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A line × tester analysis was carried out in mulberry (Morus spp.) to determine the genetic interaction in the expression of
various quantitative characters including leaf yield. Eight clonal varieties were selected, 3 of them were designated as lines
(♀) viz. Berhampore-1, China white and MS-5 and 5 of them were called as testers (♂) viz. Mandalaya, Kosen, Assamjati, MS-1
and Kajli. Combining ability studies were conducted on these parents along with their F1 hybrids for the variables laminar index, growth rate, weight of 100 dry leaves, number of primary branches per plant, plant
height, nodal distance, leaf-twig ratio, aerial biomass, moisture content, moisture retention capacity and leaf yield. Broad
genetic variability was observed among the genotypes. The ratio of General Combining Ability (GCA) and Specific Combining
Ability (SCA) indicated the predominance of non-additive genes in mulberry. While China white (female) and MS-1 (male) were
the best general combiners among the parents, Berhampore-1 × Kajli was the best cross for leaf yield. Results suggest that
selective crossing followed by proper screening may be the best approach for breeding of high yielding varieties in mulberry.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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Janarthanan Gunasekaran Nagalakshmi Kannuchamy Sathishkumar Kannaiyan Rupshankar Chakraborti 《Journal Of Aquatic Food Product Technology》2013,22(5):429-442
Utilization of shrimp head waste from the processing industry offers a solution to environmental pollution and also produces valuable bioactive peptides. The present study was aimed to optimize the alcalase assisted extraction conditions by response surface methodology (RSM) to obtain protein hydrolysates from shrimp (Metapenaeus dobsoni) head waste with maximum antioxidant activity. Based on the models derived by RSM, the optimized conditions for maximum degree of hydrolysis (DH) were pH 8.2, temperature of 45.4°C, and enzyme/substrate (E/S) of 1.8%. Meanwhile, the optimized conditions for maximum antioxidant activity of protein hydrolysates as measured by 2, 2-diphenyl-1-picrylhydrozyl (DPPH) and ferric reducing antioxidant power (FRAP) assays were pH 8.2 and 8.1, temperatures of 49.7 and 59.4°C, and E/S of 2.1 and 2.7%, respectively. The maximum predicted values for DH, DPPH, and FRAP were 42.44%, 39.64% inhibition, and 8.3 μM Fe (II)/g wet wt. of sample, respectively. The extraction of protein hydrolysates at optimal conditions derived by these models resulted in DH, DPPH, and FRAPs of 40.31%, 38.93%, and 8.21 μM Fe (II)/g of sample, respectively, demonstrating the fitness of the models. The present study demonstrates the potential of Metapenaeus dobsoni head waste as a source of protein hydrolysates with prospective antioxidant activity. 相似文献
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S. Gandhi Doss S. P. Chakraborti S. Roychowdhuri N. K. Das K. Vijayan P. D. Ghosh 《Euphytica》2012,185(2):215-225
Sericulture is an agro-based industry, which heavily depends on mulberry (Morus spp.) for its sustainability, as mulberry leaf is the only available feed for the silkworm Bombyx mori L. Sericulture, in West Bengal and other subtropical regions in India, suffers from lack of adequate quantity of quality
mulberry leaf during the colder months, the best season for rearing the high yielding bivoltine silkworm hybrids. In order
to develop mulberry varieties, which can sustain normal growth during these colder months to yield better, efforts have been
made in different research institutes in India. The present report is part of such an effort in which accessions in germplasm
bank were screened for better growth, leaf retention and leaf yield contributing associated traits. Twenty three selected
parents were crossed, 3,500 seeds were sown, 2,700 seedlings were transplanted to progeny row trail, selected 210 hybrids
were evaluated under primary yield trial and finally nine hybrids along with a control variety were studied in detail for
all leaf yield contributing traits under final yield trial. Stability analysis was adopted to identify hybrids, which can
yield stably across seasons. The hybrids CT-44 and CT-11 out yielding the control by 17.17 and 7.11% were selected as these
hybrids yield 7.93 and 8.15 mt/ha leaf respectively during the colder months (February) for their direct use as cultivars
in West Bengal and other subtropical areas of India to sustain bivoltine sericulture to produce quality and gradable silk
fibers. 相似文献
4.
M. Weisbart P. K. Chakraborti F. Gottschall H. C. Freeman 《Fish physiology and biochemistry》1989,7(1-6):267-272
The cytosol and nuclear extract of gill tissue obtained from laboratory held Atlantic salmon,Salmo salar manifested saturable cortisol binding of high affinity and low capacity (cytosol: Ka = 0.198 ± 0.024 × 109/M, Nmax = 116.8 ± 20.8 fmol/mg protein; nuclear extract: Ka = 0.823 ± 0.057 × 107/M, Nmax = 1563 ± 330 fmol/mg protein; n = 4). The cytosol receptor activity displayed high steroid and tissue specificity and a single
binding peak at 191,000 Da following gel permeation chromatography.
Atlantic salmon exposed for 3 or 8 months to waters from the Medway River (pH about 5.1), the Westfield River (pH about 4.8)
and calcium carbonate treated Westfield River (pH about 5.6) showed no gill cytosol receptor activity. Cortisol receptor activity
in the gill nuclear extracts from fish in limed Westfield River water in December (3 months) was less than half the activity
in the fish treated with Medway River water (p < 0.05) although the plasma cortisol values were not different. In May (8 months),
the plasma cortisol of fish in limed water was almost twice that of the fish held in acid Westfield River water (p = 0.058). 相似文献
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A. Purohit S. Ganguly G. Ghosh R. Kundu Chaudhuri S. Datta D. Chakraborti 《European journal of plant pathology / European Foundation for Plant Pathology》2017,147(1):73-84
Soft rot of Chinese cabbage is a disease of great economic importance to the State of Pernambuco, Brazil. The present study aimed to evaluate the effect of two calcium sources in different concentrations (calcium nitrate [Ca(NO3)2] at 0, 0.15 and 0.3 g l?1 and calcium chloride (CaCl2) at 0, 1 and 5 g l?1) that were applied through two methods (leaf spraying and soil drenching) on the control of soft rot. Further, it aimed to analyze calcium absorption by the plant and to determine calcium’s role in leaf and cell structure using microscopy. Ca(NO3)2 applied by both methods was effective in controlling soft rot caused by Pectobacterium carotovorum subsp. carotovorum, as it reduced the disease by up to 48.5 % when sprayed onto the leaves (0.15 g l?1). A significant increase in the leaf calcium content was observed only in the plants that were sprayed with higher doses of Ca(NO3)2 and CaCl2. In all of the calcium treatments, light microscopy analyses revealed an increased number of chloroplasts and improved structuring of the palisade parenchyma, while transmission electron microscopy analyses revealed an increased cell wall thickness that was especially evident for the 0.15 g l?1 Ca(NO3)2 treatment applied by leaf spraying and soil drenching. 相似文献
6.
1. Male chicks hatched from eggs heavier than 60 g weighed more (P less than 0-05) than female chicks from eggs of similar weight. 2. The weight of the residual yolk was similar in both sexes. 3. It is concluded that male embryos are better able to utilise the energy supplies in the egg, particularly after the 18th day of incubation. 相似文献
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Interspecific compatibility barriers,development of interspecific hybrids through embryo rescue and lineage of Trifolium alexandrinum (Egyptian clover)—important tropical forage legume 下载免费PDF全文
Devendra R. Malaviya Ajoy K. Roy Pankaj Kaushal Mridul Chakraborti Aradhana Yadav Ambica Khare Richa Dhir Dushyant Khairnar Ginu Percis George 《Plant Breeding》2018,137(4):655-672
Genetic improvement of Trifolium alexandrinum L. is hampered because of narrow genetic base and lack of interspecies compatibility information. The study was envisaged to understand the interspecies incompatibility and the affinity between T. alexandrinum and 22 species of the genus representing different sections and to develop interspecific crosses. Development of interspecific hybrids with T. resupinatum, T. lappaceum, T. subterraneum, T. vesiculosum and T. echinatum, through embryo rescue, revealed their affinity with T. alexandrinum. Failure of pollen germination or restricted pollen tube growth showed its distant relatedness with T. clypeatum, T. balansae, T. purpureum, T. leucanthum, T. hirtum, T. pilulare and T. hybridum. Pollen tubes reached up to ovule among the crosses with T. alpestre, T. repens and T. nigrescens, whereas it travelled up to ovary among the crosses with T. angustifolium, T. grandiflorum and T. dasyurum indicating need of manipulation to overcome barrier. Thus, incompatibility of T. alexandrinum with many Trifolium species could be overcome through embryo rescue with intensive crossing. Egyptian clover ecotype ‘Fahli’ was more compatible with other species than ‘Mescavi’. 相似文献
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Late maturity α-amylase (LMA) is a genetic defect that is fairly widely spread in bread wheat (Triticum aestivum L.) germplasm, and recently detected in durum cultivars, which can result in unacceptably high α-amylase activity (low falling
number) in ripe grain. LMA has also been observed at unexpectedly high frequency and severity in synthetic hexaploid wheats
derived from the interspecific hybridisation of Triticum durum (AABB) and Aegilops tauschii (DD). Since synthetic hexaploids represent an important new source of resistances/tolerances to a range of biotic and abiotic
stresses for wheat breeders, there is a pressing need to understand the mechanisms involved in LMA in synthetics and develop
strategies for avoiding its adverse effects on grain quality. The objectives of this study were to firstly, compare the LMA
phenotype of synthetics that varied for plant height, secondly, to characterise the LMA phenotype in groups of synthetics
derived from the same durum parents and finally to determine whether LMA in primary synthetics is associated with the QTL
previously reported in conventional bread wheat. More than 250 synthetic hexaploids, a range of durum cultivars and a doubled
haploid population derived from Worrakatta (non-LMA) × AUS29663 (high LMA synthetic) were phenotyped and genotyped with markers
reported to be linked to LMA in conventional bread wheat and markers diagnostic for the semi-dwarfing gene, Rht1. More than 85% of synthetics were prone to LMA, approximately 60% ranked as very high. Genetic control of LMA in synthetic
hexaploids appeared to involve QTL located on 7B, and to a lesser extent 3B, similar to bread wheats. However, the LMA phenotype
of many synthetic hexaploids appeared to be more extreme than could be explained by comparisons with bread wheat even taking
into account the apparent absence of Rht1 in most genotypes. Other mechanisms, possibly triggered by the interaction between the AABB and DD genomes cannot be excluded.
The presence of wild type rht1 in most synthetic hexaploids and their extreme height is difficult to reconcile with the semi-dwarf, Rht1, stature of many of the durums used in the interspecific hybridisation process. Mechanisms that could explain this observation
remain unclear. 相似文献
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