Evaluation of yearly generations of interspecific crosses of Carthamus species for productive recombinants
KrishiKosh
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Title |
Evaluation of yearly generations of interspecific crosses of Carthamus species for productive recombinants
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Creator |
Lucy Kumari
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Contributor |
R.L.Ravi Kumar
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Subject |
Genetics and Plant Breeding
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Description |
The field experiment comprising four interspecific F2 and F3 populations was carried out during rabi 2008-09. The laboratory experiment was conducted to identify the polymorphic molecular markers between parental lines A 1 and C. palaestinus and to study the segregation of some of the polymorphic markers in F2 population A 1 x C. palaestinus. The main objectives of the study were to assess the genetic variability for seed yield and its components, identification of superior recombinants in early segregating generations of interspecific crosses and analysis of molecular diversity in parental lines of Carthamus and segregation of selected markers in F2 generation. The comparison of mean revealed that the F2 populations were having significantly higher mean compared to that of F3 populations for important productive traits like plant height, test weight, volume weight and seed yield/plant. All the four populations differed for variance value for majority of the traits studied. Correlation studies indicated that seed yield/plant was strongly associated with plant height, number of capitula/plant, volume weight and capitulum diameter in both the F2 populations, whereas, in F3 populations it was strongly correlated with plant height, number of capitula/plant and number of branches/plant. The volume weight is significantly associated with seed yield/plant in all the four populations suggesting selection for high yield may not reduce the oil content. Path analysis for seed yield revealed that seed yield was directly influenced by plant height, number of capitula/plant and volume weight in all the four populations. The polymorphism between the parental lines A 1 and C. palaestinus was studied by using 13 ISSR and 16 EST-SSR markers. ISSR5 showed highest number of polymorphic bands. Seven EST-SSR markers were polymorphic and among these three (SES-33, SES-100 and SES-144) were selected to study the segregation pattern in interspecific F2 population of A 1 x C. palaestinus. The SES-33 produced the expected 1:2:1 monogenic ratio and remaining two showed significant deviation from the monogenic ratio. |
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Date |
2016-10-28T16:22:06Z
2016-10-28T16:22:06Z 2009 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/82863
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Format |
application/pdf
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Publisher |
UAS, Dharwad
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