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51.
G. Ram M. K. Bhan Ashok Ahuja S. R. Meena M. K. Kaul K. K. Gupta R. L. Jolly R. K. Khajuria 《Genetic Resources and Crop Evolution》2007,54(3):649-654
Variability studies were carried out among different accessions of Argyrolobium roseum for 12 metric traits under natural and cultivated conditions. Almost all characters showed higher values in cultivated than
natural population. Leaf breadth recorded highest CV (30.59%). Highest percentage of vitexin and D-pinitol (0.208 and 0.773%
dwb) was observed in RAR-7 and RAR-6, respectively, under cultivated conditions. Phenotypic coefficient was higher than genotypic
coefficient of variation. The association analysis revealed that root yield had positive significant correlation with 100
seed weight (r=0.839) biomass yield (r=0.601), where biomass yield had a positive significant correlation with leaf length, single pod weight. High heritability
(97.4–99.8%) coupled with moderate genetic advance ranged between (49–67%) as a percent of mean was observed for leaf breadth,
pod length, total foliage biomass yield and total root yield/plant. This suggests that direct selection for these traits is
suitable for the improvement of this crop. 相似文献
52.
Arun Kumar M. K. Kaul M. K. Bhan Punit K. Khanna K. A. Suri 《Genetic Resources and Crop Evolution》2007,54(3):655-660
Six phenotypic characters and three withanolide markers were assessed in 25 accessions of Withania somnifera collected from different states of India for studying genetic variability. The variability ranges observed at phenotypic
and chemotypic levels were polymorphic. Based on D2 values and PCA (Principal Component Analysis) of phenotypic traits like plant height, no. of branches/plant, no. of seeds/berry,
root length, root diameter and root yield, these 25 accessions were grouped in five clusters. The relative contribution of
each character towards genetic divergence was worked out. Five accessions–AGB002 (Rajasthan), AGB003 (J&K), AGB004 (Madhya
Pradesh), AGB006 (J&K) and AGB009 (Punjab) representing clusters 2 and 4 exhibited maximum intra and inter-cluster divergence.
Cluster 5 representing accession AGB053 (Andhra Pradesh) was having mixed traits. Chemically most of the accessions in cluster
3 showed uniformity in presence of three marker withanolides Withaferin A, Withanone and Withanolide A in the leaves. 相似文献
53.
H K Pradhan G C Mohanty W Y Lee L Kaul J M Kataria 《Veterinary immunology and immunopathology》1988,19(2):165-171
Chickens infected with Marek's disease (MD) virus developed immune complex (IC)-mediated glomerulopathy. Fluorescent antibody staining technique using antichicken globulin and antichicken complement was used to demonstrate IC in the kidney glomeruli. During the initial stages of MDV infection, IC deposits were seen on the glomerular basement membrane, but subsequently the entire glomerulus was involved. Mesangial cells also had IC deposits. Chicken complement was demonstrated in the glomeruli which had IC deposits. The number of glomeruli with IC deposition was higher in tumor-bearing birds than in non-tumor-bearing birds. Histologically, kidney lesion were characterized by thickening of basement membrane and proliferation of mesangial cells. It is suggested that IC-mediated glomerulopathy might be one of the major causes of death in MD. 相似文献
54.
MT Maurano R Humbert E Rynes RE Thurman E Haugen H Wang AP Reynolds R Sandstrom H Qu J Brody A Shafer F Neri K Lee T Kutyavin S Stehling-Sun AK Johnson TK Canfield E Giste M Diegel D Bates RS Hansen S Neph PJ Sabo S Heimfeld A Raubitschek S Ziegler C Cotsapas N Sotoodehnia I Glass SR Sunyaev R Kaul JA Stamatoyannopoulos 《Science (New York, N.Y.)》2012,337(6099):1190-1195
55.
56.
Nardostachys jatamansi is a perennial, endangered medicinal and aromatic herb of family Valerianaceae, distributed in subalpine to alpine areas. Being an endangered species it should be conserved through in situ as well as ex situ methods. Study of reproductive biology is necessary for effective conservation of endangered plants and pollination behaviour is an integral part of reproductive biology. Present study deals with pollination behaviour of N. jatamansi. Parthenocarpy, passive autogamy, active autogamy, geitonogamy and xenogamy experiments were applied in this study. Flowering (peak) takes place during the month of July–August and anthesis between 7:00–11:00 h. Anthers disperse pollen grains after 24 h of anthesis. Stigma is of protogynous type. Fruit set recorded in above experiments was 40% in passive autogamy, 70% in active autogamy, 53.33% in xenogamy and 86.67% in geitonogamy as well as open pollination experiments. The species is self-pollinated but dependent on pollinators for optimum pollination. Cross pollination may have adaptive value for species as it compensate failure of autogamy and also maintains genetic variability in the population. Crop improvement program may be initiated through xenogamy. 相似文献
57.
Kiran Kaul 《New Forests》2008,36(3):217-224
The present study investigates optimal conditions for the vegetative propagation of Himalayan yew Taxus wallichiana Zucc., an important medicinal tree, during spring. Effect of four treatments: (a) sex of donor plant (male and female), (b)
age/type of shoot (1, 2, 3 year old, long and dwarf shoots), (c) auxin treatment (IBA and NAA at 0, 0.5, 1.25, 5.0 & 50.0 mM)
and (d) rooting environment (raised beds/polythene bags) on percentage rooting in stem cuttings was studied. Randomized complete
block (RBD) designs were used for experimentation. Rooting ability of cuttings was significantly influenced by all these treatments.
The overall rooting response was higher in long shoot cuttings taken from female tree. Age of shoot also influenced the rooting
response and was highest in 1 year old long shoot cuttings of female tree. Exogenous application of auxin, α-naphthalene acetic
acid (NAA) and indole-3 butyric acid (IBA), had significant positive effect on the percentage rooting. IBA significantly enhanced
the rooting percentage in 1 year old long and dwarf shoots at lower doses and 2 and 3 year old long shoots from female tree
at higher doses. Maximum percent rooting (90% ± 2.8) was obtained with interactive effect of 0.5 mM, NAA (22 h) × 1 year old
long shoot from female tree; followed by the interactive effect of 50 mM IBA (5 s) × 3 year old long shoot from female tree
(83% ± 4.1). Cuttings planted in soil: sand medium in polythene bags showed earlier rooting response (12 weeks) than cuttings
planted in raised nursery beds (24 weeks). Overall, the findings of this study suggest that 0.5 mM IBA treatment is suitable
for enhancing adventitious rooting in 1 year old long and dwarf shoots of male and female trees. IBA at higher doses is suitable
for enhancing the rooting percentage of 2 and 3 year old long shoots from female tree. This study provides a significant lead
towards the development of a simple and inexpensive technique for large scale propagation, aforestation of elite genotypes
and raising of bush type plantation under ex-situ conditions. 相似文献
58.
Grain and stover yield are key traits for the improvement of rabi sorghum varieties and hybrids in India. Large genotype-by-environment interactions (GEI) were identified for both grain and stover yield based on 10 years’ data available from the All India Coordinated Sorghum Improvement Program (AICSIP) experiments conducted from 1986/87 to 1996/97. From the estimates of the genotypic, GEI and residual components of variance for the four traits, a multi-environment testing strategy based on 15–20 locations, 2–3 years, and two replicates per trial would be required to achieve estimates of repeatability of approximately 0.70 for grain yield, 0.45 for stover yield, 0.70 for flowering time, and 0.85 for plant height. 相似文献
59.
60.
The hydrosoluble fraction of Euphorbia royleana latex (AER), administered by gavage at doses of 50-200 mg/kg, showed dose-dependent anti-inflammatory and anti-arthritic effects in different acute and chronic test models in rats and mice. It reduced the exudate volume and the migration of leukocytes and showed a poor inhibitory effect on the granuloma formation induced by cotton pellets, while it had a low ulcerogenic score. The oral LD(50) was more than 1500 mg/kg in both rats and mice. 相似文献