STUDIES ON GENETIC DIVERGENCE AND CHARACTER ASSOCIATION IN SAFFLOWER ( Carthamus tinctorius L. )
KrishiKosh
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Title |
STUDIES ON GENETIC DIVERGENCE AND CHARACTER ASSOCIATION IN SAFFLOWER ( Carthamus tinctorius L. )
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Creator |
SIRISHA, M
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Contributor |
FARZANA JABEEN
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Subject |
GENETIC, DIVERGENCE, CHARACTER, ASSOCIATION, SAFFLOWER
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Description |
A study of the range, magnitude, nature and exploitability of genetic variation and the extent to which the desirable characters are heritable plays an important role in crop improvement. The estimates of variability for yield and its heritable components in the material with which the breeder is working are pre-requisites for any breeding programme, as it helps in selecting desirable parents for evolving superior varieties showing genetic prepotency for yield. Hence, a concerted effort is required to tap the beneficial genes through conventional hybridization techniques. In the present study, a trial consisting of sixty germplasm accessions and four check varieties was laid in Simple Lattice design with two replications at College Farm, College of Agriculture, Acharya N. G. Ranga Agricultural University, Rajendranagar, Hyderabad. The data were recorded for ten morphological and 12 quantitative characters. Morphological characterization was done with IPGRI descriptor guidelines. Considerable amount of variability was observed for all morphological characters. Analysis of variance revealed significant differences among the genotypes for all the characters studied, indicating wide variability among the experimental material. The estimates of PCV and GCV were high in case of seed yield/plant followed by number of primary branches /plant and number of effective capitula /plant indicating high, variability for the characters among the genotypes while low variability estimates were noticed for days to maturity and oil content. The extent of genetic divergence between genotypes in the experimental material was assessed by Mahalanobis D2 analysis. The cluster analysis partitioned the sixty four genotypes into nine clusters based on D2 values. Maximum genetic divergence was found between cluster VI and cluster IX followed by cluster II and cluster IX, suggesting that the genotypes in these clusters could be exploited by intermating in a definite design to explore the wide range of heterosis and to release good recombinant lines. Seed yield/ plant had contributed maximum towards genetic divergence while oil content and main capitulum diameter contributed least towards divergence. Correlation analysis revealed that number of primary branches /plant, main capitulum diameter, number of effective capitula/plant, number of filled seeds in main capitulum, biological yield/plant, hull content, had positive association with seed yield/plant. Days to 50% flowering, days to maturity, plant height, 100-seed weight and oil content exhibited negative association with seed yield. Path analysis revealed that biological yield/plant had highest positive direct effect followed by 100-seed weight on seed yield/plant. Days to 50% flowering, plant height and oil content exhibited negative direct effect on seed yield. |
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Date |
2016-07-30T10:55:02Z
2016-07-30T10:55:02Z 2009 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/70214
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Language |
en
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Relation |
D8533;
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Format |
application/pdf
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Publisher |
ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY RAJENDRANAGAR, HYDERABAD
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