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1.
Inheritance and Correlation of Self-Compatibility and other Yield Components in the Apricot Hybrid F1 Populations 总被引:2,自引:0,他引:2
Xuesen Chen Yan Wu Meixia Chen Tianming He Jianrong Feng Qing Liang Wen Liu Honghua Yang Lijie Zhang 《Euphytica》2006,150(1-2):69-74
Summary To provide genetic basis for apricot (Prunus armeniaca Lam.) breeding, inheritance and correlation of yield components including self-compatibility, self-pollinated fruiting rate, fertile flower rate, average fruit weight and fruit number per plant were studied with 5-year-old seedlings of apricot F1 hybrids from ‘Katy’ × (‘Xinshiji’, ‘Katy’ × (‘Hongfeng’ and ‘Katy’ × (‘Taianshuixing’, respectively. Using the criteria that cultivars with self-pollinated fruiting rate ≥6% were self-compatible(SC), we found that the ratios of self-compatible (SC) to self-incompatible (SI) individuals were 27:25, 9:12 and 15:19 in the above three families, respectively, and conformed to the ratio of 1:1 segregation by χ2 test, indicating that the S-locus of ‘Katy’ was heterozygous and self-compatibility was dominant to self-incompatibility. Twenty-seven seedlings from the F1 population of ‘Katy’ × ‘Xinshiji’ were chosen for S-allele-specific PCR. As a result, four S-genotypes with the ratio of 10:6:4:7 were obtained, which was linear to the 1:1:1:1 ratio by χ2 test. Great differences in self-compatibility degree were observed among seedlings even with the same S-genotype. In the F1 populations, a very extensive segregation in self-pollinated fruiting rate, fertile flower rate and average fruit weight was observed, and average values of these traits were lower than that of mid-parent. Therefore, these traits were confirmed to be quantitative. However, significant differences were found in broad heritability (H
b
2) of following three characters: the H
b
2 of self-pollinated fruiting rate (87.1% – 91.4%) was the greatest, with the variation mainly resulted from inheritance; fertile flower rate (36.8% – 49.1%) was the least and its variation was mainly caused by environmental factors. In addition, self-pollinated fruiting rate and fertile flower rate had very significantly positive correlations with single plant yield, so both may play important roles in the determination of single plant yield. In contrast, correlation between yield and average fruit weight was not significant. 相似文献
2.
Patterns of flowering and seed set were explored by principal component (PC) analysis of counts of fresh flowers, total flowers
and seeds at four observation times. This pattern analysis was attempted because of the complicated rhythms of flowering and
seed set over an extended period. The approach was considered superior to regressions (over time) for this data because of
these pattern complexities, and because these were few time-nodes. Also it avoided the need to find optimum regression functions.
Parsimony was achieved with a two-component ordination based on truncation at 70% of the total variance. The results for all
characters showed that the first component concentrated on the middle period of flowering/seed set, and de-emphasized the
early phase. The second component emphasized the extremities of the flowering/seed set span. The first component accounted
for a large proportion of total variance (45.5% to 69.2%), which indicated its importance. The general meaning of the first
component was ‘median flowering’, ‘general flower production’ and ‘median-to-late seed set’ for these characters fresh flowers,
total flowers and seed set, respectively. The results showed that PC analysis successfully summarized the complex patterns
of flowering/seed set and revealed the pattern differences between plants. It was apparent that no particular pattern of general
flowering and seed set could be regarded as ‘typical’ in meadowfoam. It was confirmed that the population was diverse, this
being typical of segregating plants within a randomly fertilized population.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
3.
Marina Novo Silvia Romo Manuel Rey María Jesús Prado María Victoria González 《Euphytica》2010,175(1):109-121
Fruit set in kiwifruit is strongly dependent on pollination, which is limited by the lack of efficient male pollen donors,
among other factors. We searched for molecular markers that could be polymorphic in relation to flowering time in order to
classify male kiwifruit plants to discard those that are not likely to perform as efficient pollen donors. Random amplified
polymorphic DNA (RAPD) and modified amplified fragment length polymorphism (AFLP) markers were generated using 41 male kiwifruit
plants in two flowering groups, early- and late-flowering males (with respect to the female cultivar ‘Hayward’). One RAPD
and nine modified-AFLP markers polymorphic between male plants exhibiting different flowering time were identified, sequenced
and analysed in databases. Unweighted pair group method with arithmetic average (UPGMA) clustering and multidimensional scaling
showed that these markers could be used to classify the male plants into flowering groups. Analysis of molecular variance
(AMOVA) agreed with this classification, showing that most of the genetic variation is found between flowering groups. Sequence
analysis based on a database search revealed that the polymorphism PolM contains a 7-nucleotide long element involved in the
repression of the phytochrome A gene, that Pol4 is a partial sequence of a phytochrome B gene, and that sequences Pol3, Pol5,
Pol7, and Pol9 show high identity with ESTs from kiwifruit buds treated with hydrogen cyanamide. Clustering analysis supported
the previous classification of males into flowering groups, making it feasible to predict male plants’ flowering times with
respect to the cultivar ‘Hayward’ based upon these molecular markers. 相似文献
4.
In contrast to the yellow color of pollen of European hazelnut (Corylus avellana L.) cultivars, an unusual cream color was observed in some seedlings from self-pollination of the Sicilian cultivar ‘Montebello.’
After elimination of accidental outcrosses, the segregation fit a 3 yellow: 1 cream ratio, indicating the possibility of simple
genetic control. Two seedlings with cream-colored pollen were backcrossed to their parent ‘Montebello,’ and the progeny segregated
1 yellow: 1 cream for pollen color. When two seedlings with cream-colored pollen were crossed with each other, all of the
resulting seedlings had cream-colored pollen. These segregation ratios indicate that pollen color in hazelnut is controlled
by a single locus with yellow dominant to cream color. The symbol pc is proposed for this locus.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
5.
Sarika Mathure Asif Shaikh N. Renuka Kantilal Wakte Narendra Jawali Ratnakar Thengane Altafhusain Nadaf 《Euphytica》2011,179(2):237-246
Eighty-eight aromatic cultivars collected from Maharashtra state were assessed for determinants of kernel quality (kernel
size-shape, test weight and aroma) and grain morphology such as awning, lemma and palea characters, pubescence, colour of
sterile lemma and apiculus colour. We, report seven cultivars—‘Girga’, ‘Kothmirsal’, ‘Kala bhat’, ‘Chimansal’, ‘Jiri’, ‘Kalsal’
‘Velchi’ and ‘Kali kumud’ as indigenous to southern India. Of the 69 cultivars characterized for agronomic traits 36 cultivars
were exquisite genotypes and possessed one or more superior traits such as early flowering, dwarf stature, higher number of
productive tiller per plant; long panicles; higher number of filled grains per panicle and strong aroma. Variability in aromatic
cultivars was assessed on the basis of nine traits placed aromatic rice cultivars in five clusters. Number of cultivars in
each cluster ranged from 1 to 33. 27 significant correlations were obtained in the physical, agronomic and grain morphology
traits. Aroma was found to be negatively associated with days to 50% flowering as well as with filled grains per panicle.
However, correlation between panicle length and effective tillers with aroma was not observed. Therefore, to increase the
yield, improvement in length of panicle and increasing number of productive tillers in medium or mild scented cultivars would
be the best strategy. 相似文献
6.
Identification and genetic characterization of different resistance sources to ascochyta blight within the genus Lens 总被引:2,自引:0,他引:2
The self-incompatibility mechanism in 10 local radish cultivars was investigated through seed set analysis and pollen tube
growth behavior. The objective was to identify self-incompatible local radish lines for hybrid seed production. Based on a
seed set ratio as an estimate for self-incompatibility, cultivars Tangail Local, Tasaki, Kuni, Aushi and Indian Aushi were
identified as self-compatible. An intermediate seed ratio was observed in ‘Red Mollika’, ‘Pinky’ and ‘Red Bongi’. Moderately
strong self-incompatibility was observed in ‘Red Kalpin’ and ‘Kuni White’. Pollen tube growth behavior revealed that self-incompatible
lines had a relatively lower number of germinated pollen grains per stigma and pollen tubes per style than those of self-compatible
lines. The two self-incompatibility test methods gave comparable results. None of the cultivars under study was found to be
fully self-incompatible.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
7.
To obtain crossing products, an efficient pollination and subsequent fertilization is essential. This efficient pollination is achieved by pollen germination and tube growth. Here, these pollen characteristics of 2 genetically differentiating cultivars of Anemone coronaria L. were investigated in vitro. For the essential components boron, calcium and an osmoticant, only calcium showed to be crucial for pollen germination. Boron concentrations influenced the pollen tube length with a concentration of 100 mg l?1 H3BO3 resulting in the longest pollen tubes. For the osmoticant sucrose, a concentration of 100 g l?1 caused a significant positive effect on both pollen germination and pollen tube length for the 2 cultivars. The cultivars reacted similarly with respect to the investigated compounds. Next to this, the pollen development was correlated with 8 different flower stages in A. coronaria. As a final point, the germination of an optimized pollen germination medium was compared with in vivo pollen germination in cross-pollinations within the same cultivar (identified by aniline blue staining). For ‘Mistral Wine’, pollen germination percentage was lower in vitro than in vivo, while ‘Wicabri Blue’ pollen showed no significant difference in germination rates in vivo and in vitro. To achieve fertilization a following requisite is that the stigma is receptive. To study this, the most receptive female flower stage of the 8 different flower stages for A. coronaria was characterized by aniline blue staining. A. coronaria clearly showed protogyny. 相似文献
8.
H. Jonkers 《Euphytica》1958,7(1):41-46
For shortening the life-cycle of strawberry plants a combination of seed- and plant treatment was applied to seeds and resulting seedlings of the varieties Climax, Jucunda and Deutsch Evern.Of the seed treatments applied, a cold treatment of 16 days at 3–5°C produced a very bad germination. A treatment with H2SO4 96% gave a more rapid germination and a considerably higher percentage of germination.Seedlings with three trifoliate leaves cannot be induced to flower by short-day treatment. For an effective short-day treatment of Deutsch Evern at least five and with Climax and Jucunda at least seven trifoliate leaves should be formed prior to short-day treatment. The freshly harvested seed from seedlings forced to rapid flowering has normal germination power.Through a combination of sulfuric acid treatment of the seed and a short-day treatment of the seedlings as soon as the latter have become sensitive, the life-cycle can be shortened from 18–24 months to 8–9 months.
Publikatie 175 相似文献
Publikatie 175 相似文献
9.
F. Lin S. L. Xue D. G. Tian C. J. Li Y. Cao Z. Z. Zhang C. Q. Zhang Z. Q. Ma 《Euphytica》2008,164(3):769-777
Flowering time is an important trait for the adaptation of wheat to its target environments. To identify chromosome regions
associated with flowering time in wheat, a whole genome scan was conducted with five sets of field trial data on a recombinant
inbred lines (RIL) population derived from the cross of spring wheat cultivars ‘Nanda 2419’ and ‘Wangshuibai’. The identified
QTLs involved seven chromosomal regions, among which QFlt.nau-1B and QFlt.nau-2B were homoeologous to QFlt.nau-1D and QFlt.nau-2D, respectively. Nanda 2419, the earlier flowering parent, contributed early flowering alleles at five of these QTLs. QFlt.nau-1B and QFlt.nau-7B had the largest effects in all trials and were mapped to the Xwmc59.2–Xbarc80 interval on chromosome 1BS and the Xgwm537–Xgwm333 interval on 7BS. Most of the mapped QTL intervals were not coincident with known vernalization response or photoperiod sensitivity
loci and QFlt.nau-1B seems to be an orthologue of EpsA
m
1. Four pairs of loci showed significant interactions across environments in determining flowering time, all of which involved
QFlt.nau-1B. These findings are of significance to wheat breeding programs. 相似文献
10.
DNA amplification fingerprinting and marker screening for pseudo-testcross mapping of flowering dogwood ( Cornus florida L.) 总被引:2,自引:0,他引:2
DNA amplification fingerprinting (DAF) with arbitrary oligonucleotide primers was used to study genetic relationships between
cultivars of flowering dogwood (Cornus florida L.), evaluate extent of plant hybridization, and generate markers in pseudo-testcross
mapping at the intraspecific level. Modified Taguchi optimization methods defined a robust DAF system based on high annealing
temperature (48–52 °C) and primer concentration (typically 8 μM) that was used to study genetic diversity of representative
dogwood cultivars and hybrids. Phenetic analysis using cluster and numerical methods showed that: (1) cultivars were relatively
conserved at the genetic level; (2) their hybridization could be identified in the F1 progeny in the absence of phenotypic
or physiological markers; (3) several cultivars grouped according to their recorded ancestry; and (4) dogwood anthracnose-resistant
lines originally selected in Catoctin Mountain Park (Maryland) grouped separately from those of southern origin. The DAF protocol
was also tested in pseudo-testcross mapping of dogwood at the intraspecific level. A preliminary screening of parents ‘Pink
Sachet’ and ‘Fragrant Cloud’ and 7 F1 segregants with 22 octamer primers produced 703 amplified loci, 30 and 39 of which were
male and female markers segregating at 1:1 ratios with 98.6% confidence levels in pseudo-testcross configuration. Overall
results show that DAF generated markers very efficiently (3 per primer) despite the close relatedness of parental dogwood
cultivars. This study constitutes the basis for a future genetic linkage mapping and marker-assisted selection (MAS) effort
initially targeted to control important fungal diseases in dogwood.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
11.
Self and cross-incompatibility determination by means of fruit and seed set experiments or pollen tube growth observations
in the style has been frequently reported to be unclear in pear (Pyrus communis L.). Thus,in order to develop a reliable in vivo method to test pollen-pistil incompatibility in pear, pollen tube performance has been studied along the pistil following
self and cross-pollinations. Results show that, while pollen tube growth in the style may be an unclear test, ovule observation
at the microscope for the presence of pollen tube in the nucellus is a proper method to test incompatibility in this crop.
With this analysis we could identify S-alleles of ‘Williams’ (S1S2) and ‘Coscia’(S3S4), and three of the four possible S-genotypes resulting from the ‘Williams’ × ‘Coscia’ cross, as represented by ‘Butirra Precoz
Morettini’ (S1S3), ‘Santa Maria Morettini’ (S2S3)and ‘Tosca’ (S1S4). This result demonstrates that ‘Williams’ and ‘Coscia’ cultivars do not share any allele in common. We also established
two new inter-incompatibility groups in pear. Furthermore, the presence of a common allele between ‘Williams’ and ‘Agua de
Aranjuez’,and ‘Coscia’ and ‘Agua de Aranjuez’, three apparently unrelated old cultivars, may indicate a narrower genetic base
than expected for European pear. This finding together with the fact that 40% of new released cultivars have direct or indirect
parental relationship with the cultivars ‘Coscia’ and/or ‘Williams’, anticipates the possibility of new cases of cross-incompatibility
for this crop in the future. Both the method described and the determination of the S-genotypes will facilitate the characterisation
of self and cross-incompatibility relationships in this species.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
12.
Interspecific hybridisation between Hibiscus syriacus, Hibiscus sinosyriacus and Hibiscus paramutabilis 总被引:1,自引:0,他引:1
Interspecific hybrids from crosses between H. syriacus × H. paramutabilis and H. syriacus × H. sinosyriacus were obtained. In both cases unilateral incongruity was observed and reciprocal crosses yielded no fruits. In vitro embryo
rescue, 11 weeks after pollination, increased the germination capacity of H. syriacus × H. sinosyriacus embryos, while this was not the case for H. syriacus × H. paramutabilis embryos. However, a lot of the generated H. syriacus × H. sinosyriacus seedlings were lost due to variegated and total albinism. In the progeny of H. syriacus ‘Oiseau Bleu’ × H. paramutabilis about 95% of the seedlings had an intermediate flower and leaf morphology compared to both parent plants. Leaves on the adult
F1 hybrids showed a polymorphism. In total four different leaf types could be observed on the same plant. This leaf polymorphism
also was seen in the progeny of H. syriacus ‘Melwhite’ × H. sinosyriacus ‘Lilac Queen’. In this progeny about 50% of the seedlings had an intermediate flower and leaf morphology compared with the
parent plants. The hybrid nature of the seedlings of both progenies was also confirmed by AFLP analysis. Despite the low germination
vigour of the pollen of the hybrids, a small F2 generation was obtained from H. syriacus ‘Oiseau Bleu’ × H. paramutabilis. 相似文献
13.
Arancha Arbeloa M. E. Daorden E. García A. Wünsch J. I. Hormaza J. A. Marín 《Euphytica》2006,147(3):389-394
The incidence of fortuitous pollination on interspecific hybridizations of the plum rootstock Myrobalan with the apricot cultivars
‘Moniquí’ and ‘Moniquí Borde’ was assessed in this work. Progeny was originated through hand pollination of emasculated flowers
of three Myrobalan clones, without bagging, in 1998 and 1999. Fruit set was low and variable among years (1.8–8.0%), but higher
than the level of accidental pollination measured with emasculated and non-pollinated flowers (1.2%). Molecular characterization
of the progeny was performed with three SSR markers showing that only 28% of the seedlings, obtained by in vitro germination
and culture of immature embryos, were hybrids. This represents a lower percentage than expected, and is explained here by
the low viability of hybrid embryos and seedlings. The use of molecular markers is discussed in terms of a convenient method
for an early identification of putative hybrids in breeding programs with low setting crosses, where the proportion of non-hybrids
is magnified. 相似文献
14.
Celso Lopes de Albuquerque Frederico Denardi Adriana Cibele de Mesquita Dantas Rubens Onofre Nodari 《Euphytica》2011,181(2):277-284
Apple plants are self-incompatible because a genetic mechanism allows the female reproductive organ to recognize and reject
self-pollen or pollen from genetic related individuals and allows non-self pollen to effect fertilization. Thus, there are
implications to both breeding strategies and orchard management for fruit production. The purpose of this study was to identify
and to characterize the S-RNase alleles of the gametophytic incompatibility among apple cultivars developed in Brazil, seeking
to give support for choosing right combinations of parent in the apple breeding programs. It also sought to identify correct
combinations of scion/pollinator cultivars of commercial apple orchards. A total of 16 specific S-RNase alleles primers were
tested against DNA extracted from 12 Brazilian cultivars and their parents. The molecular analysis confronted to the reference
cultivars, showed that the cultivars Daiane, Imperatriz and Princesa have the same incompatibility S3 and S5 alleles, while
‘Lisgala’ showed the alleles S2 and S5; ‘Suprema’, S1 and S9; ‘Catarina’, S1 and S19; ‘Joaquina’ and ‘Fred Hough’, S5 and
S19; ‘Baronesa’, S3 and S9; ‘Duquesa’, S2 and S3. For ‘Primícia’ and ‘Condessa’ it was only possible to identify one of the
S-alleles, namely S24 and S2, respectively, with the second allele remaining to be identified. Progeny test indicated the
Mendelian inheritance for RNase alleles. Results of this study will be helpful to judiciously choose parents in apple breeding
programs to improve compatibility. 相似文献
15.
Summary Three staining methods (acetocarmine, fuchsin and oxidation of benzidine) and germination in vitro and in vivo were applied to estimate pollen fertility in Solanum species and dihaploids. Pollen was divided into six classes based on shape and contents of the grains. With acetocarmine, fuchsin, peroxidase and germination in vitro 4, 3, 2 and 1 classes, respectively, are supposed to be included in the percentage of good pollen as measured by these methods. This percentage therefore, in more than 96% of the cases studied, shows a decrease in the order indicated. Neither aging of pollen at room conditions nor collecting pollen from flowers on 1–9 days after anthesis does influence the percentage of good pollen with acetocarmine and fuchsin, whereas this percentage drops sharply to zero with peroxidase and germination in vitro. The latter two methods apparently measure as good pollen only the grains with living cytoplasm. When pollen is collected at three successive dates from the same flowers the percentage of good pollen drops sharply with all methods used. There is a relation between quantity of pollen per flower and pollen quality (% good), low-quantity pollen containing significantly lower percentages of good pollen than medium- and high-quantity pollen. The latter two are not significantly different in this respect.From calculations of correlation coefficients it is concluded that only germination of pollen in vitro is significantly correlated with berry and seed set and thus gives a reliable estimate of male fertility. This does not hold true for the two staining methods without due reserve. The peroxidase method is not useful for the Solanum material studied.After standardized pollination the average number of haploid pollen grains on diploid stigmata was found to be 1625±127, that of diploid pollen on tetraploid stigmata 2863±98.A. W. B. Janssen 1975. 相似文献
16.
Shigeki Moriya Hiroshi Iwanami Kazuma Okada Toshiya Yamamoto Kazuyuki Abe 《Euphytica》2011,177(1):135-150
Differentiation of cultivars with simple sequence repeat (SSR) markers is a very useful technique for the true-to-type characterization
of cultivars and clarification of parent-offspring relationships. We developed an SSR marker set for cultivar identification
comprising 15 markers that were screened from 46 previously published SSRs. This marker set could be used for apple varieties
including Malus × domestica and/or other Malus species. These SSRs successfully characterized 95 apples, including the leading and major founding cultivars used worldwide
for modern apple breeding. Therefore, this marker set could be applied to almost all apple cultivars. We also analyzed the
parent-offspring relationships of 69 cultivars by considering allele transmissions. This analysis revealed the true parentage
of the following seven cultivars: ‘Kizashi’, ‘Chinatsu’, ‘Honey Queen’, ‘Haruka’, ‘Seirin’, ‘Ozenokurenai’, and Morioka #48.
This analysis also revealed a parentage discrepancy for ‘Hacnine’. From the parent-offspring analysis, two microsatellite
mutation events at alleles inherited from pollen parents were observed. 相似文献
17.
Summary Early flowering carnation cultivars, responding to artificial long days, can assist the grower to plant the onset of flowering and achieve a better distribution of flower production over the year.A comparative trial is described of 20 carnation genotypes (cultivars and backcrosses of interspecific hybrids), representing a wide variation in flowering time and response to long days. The trial was planted in September in a phytotron under a winter light intensity of 15 W/m2 for eight hours per day. In one half of the trial, daylength was increased to 24 hours for 25 days in December-January. At the end of February the plants were transferred to a glasshouse where they were observed until all primary shoots had flowered. The main purpose of the experiment was to analyse the genetic factors responsible for the large differences in flowering behaviour between genotypes. Average flowering dates varied from 132 days from pinching in a Dianthus chinensis hybrid to 181 days in the mediterranean cultivar Raggio di Sole. LD response was most pronounced in the earliest flowering Diantini selections and least in the traditional commercial cultivars. In the former the LD effect was evident in all shoots of a plant, but mostly so in the lower (older) shoots; in the traditional cultivars only the higher placed shoots responded to LD. As a result, the proportion of the shoots actually responding to LD varied from 28% in the traditional cultivars to 54% in the Diantini x D. Allwoodii cv Doris group of genotypes. 相似文献
18.
The quantity and quality of pollen produced by a genotype are important attributes to be considered in the selection of male
parents for breeding. The objective of this research was to determine the quantity and quality of pollen in 13 selected East
African Highland bananas (EAHB) in relation to six diploids commonly used as male parents. Pollen quantity was scored on a
scale of 0–6 while the variation of pollen stainability along the rachis was determined using acetocarmine glycerol jelly.
Actual male fertility was determined by using pollen from the EAHB varieties on M. acuminata spp. burmannicoides, ‘Calcutta 4’, as the female. The diameter of 200 viable pollen grains was measured under a microscope with the aid of a
graduated eyepiece. Significant differences were obtained for mean pollen stainability and pollen diameter. The pollen stainability
for diploids was higher than that for the EAHB. Node numbers contributed significantly to variation of pollen stainability
in EAHB (P ≤ 0.01) and ‘Pisang lilin’ (P ≤ 0.001). ‘Pisang lilin’ and the EAHB varieties had about 100 nodes as opposed to about 200 in other diploids. The EAHB varieties
produced less pollen than most of the diploids. The actual male fertility of EAHB varieties was low (1 seed/bunch), compared
to that of ‘Calcutta 4’ (223.3 seeds/bunch) and ‘Pisang lilin’ (13.7 seeds/bunch). Although the production of 2n pollen in EAHB varieties was low (0–7%), the potential exists for using them in new breeding approaches. 相似文献
19.
A unique flower initiation of the wild Junebearing strawberry strain ‘CHI-24-1’ in Fragaria chiloensis occurs under 24 h DL and high temperature conditions. To introduce the floral initiation characteristics of ‘CHI-24-1’ into
cultivated strawberries of F. × ananassa, a cross pollination was conducted between ‘CHI-24-1’ and the Japanese short-day type strawberry cultivar ‘Nyoho’. The floral
initiation of ‘CHI-24-1’ was induced in both parent and daughter plants linked with runners under a 24 h DL and 23/20 ∘C, but not 8 and 16 h DLs at the same temperatures. Of the 21 F1 hybrids grown under the 24 h DL, 12 showed flower truss production
in the parent and/or daughter plants linked with runners. Among 64 F1 hybrids, 26 exposed to 8, 16 and 24 h DLs for 30 days
produced no flower trusses. However, 32, one and five F1 hybrids produced flower trusses under the 24 h DL alone, 8 h DL alone
and both the 8 and 24 h DLs, respectively. The results of the experiments indicated that none of the F1 hybrids were day-neutral
plants, but approximately 60% had the characteristics of floral initiation under 24 h DL, which was inherited from the pollen
parent of ‘CHI-24-1’. The importance of the unique floral initiation characteristics under 24 h DL with high temperature for
strawberry breeding was discussed. 相似文献
20.
Fei Zhang Sumei Chen Fadi Chen Weimin Fang Yanming Deng Qingshan Chang Pusheng Liu 《Euphytica》2011,177(1):15-24
The inheritance of two flowering traits of chrysanthemum, initial blooming time and the duration of flowering, was investigated
using segregation within an F
1 population derived from a cross between the autumn-flowering ‘Yuhualuoying’ and the summer-flowering ‘Aoyunhanxiao’ cultivars.
The analysis, based on a single segregating generation and the major gene plus polygene mixed inheritance model, showed that
the inheritance of both traits was compatible with the presence of two pairs of major genes displaying additivity–dominance–epistasis,
with additivity predominating. As the heritability of both pairs of major genes was high (initial blooming time ~65%, duration
of flowering ~72%), it should be possible to select for both traits in early breeding generations. A marker-trait association
analysis based on sequence-related amplified polymorphism (SRAP) genotyping uncovered 10 (initial blooming time) and 12 (duration
of flowering) markers significantly associated with phenotype, cumulatively explaining, respectively, 46 and 54% of the variation.
Some potentially useful markers were identified. 相似文献