Combining Ability for Biological Nitrogen Fixation Traits and Yield Components in Blackgram(Vigna mungo(L.) Hepper)
By: Beena Thomas.
Contributor(s): Sreekumar S G (Guide).
Material type:
BookPublisher: Vellayani Department of Plant Breeding and Genetics, College of Agriculture 1996DDC classification: 630.28 Online resources: Click here to access online Dissertation note: MSc Abstract: The research programme was carried out at the Department of Plant
Breeding and Genetics, College of Agriculture, Vellayani during 1995-96.
The objective was to assess the general and specific combining abilities and
gene action involved in the inheritance of biological nitrogen fixation traits
and yield components in blackgram, as a preliminary step for developing high
yielding varieties with good biological nitrogen fixation capacity. The five
lines, three testers and their 15 combinations were evaluated in a replicated
field experiment and data on twelve characters were collected and subjected
to line x tester analysis.
The best general combiners for important biological nitrogen fixation
traits were COBG305 and Pant U19 among lines and T9 among testers. The
hybrid combination Pant U19 x T9 was the best specific combiner for these
characters. In the case of number of pods and grain yield per plant, among.
lines WBG-13 and among testers T9 were the best general combiners. The
hybrids, LBG 17 x VBN 1 and WBG 13 x AKU4 were the best specific
combinations for these traits.
Considering the mean performance, sea effect and standard heterosis
percentage Pant U 19 x T9 was identified as the best hybrid combination for
nodule weight and nitrogen content at 50 per cent flowering. Regarding
yield, the best hybrid was WBG 13 x AKU4. These superior combinations can
be utilized further for developing improved blackgram varieties.
| Item type | Current location | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|
Theses
|
KAU Central Library, Thrissur Theses | 630.28 BEE/CO (Browse shelf) | Available | 171183 |
MSc
The research programme was carried out at the Department of Plant
Breeding and Genetics, College of Agriculture, Vellayani during 1995-96.
The objective was to assess the general and specific combining abilities and
gene action involved in the inheritance of biological nitrogen fixation traits
and yield components in blackgram, as a preliminary step for developing high
yielding varieties with good biological nitrogen fixation capacity. The five
lines, three testers and their 15 combinations were evaluated in a replicated
field experiment and data on twelve characters were collected and subjected
to line x tester analysis.
The best general combiners for important biological nitrogen fixation
traits were COBG305 and Pant U19 among lines and T9 among testers. The
hybrid combination Pant U19 x T9 was the best specific combiner for these
characters. In the case of number of pods and grain yield per plant, among.
lines WBG-13 and among testers T9 were the best general combiners. The
hybrids, LBG 17 x VBN 1 and WBG 13 x AKU4 were the best specific
combinations for these traits.
Considering the mean performance, sea effect and standard heterosis
percentage Pant U 19 x T9 was identified as the best hybrid combination for
nodule weight and nitrogen content at 50 per cent flowering. Regarding
yield, the best hybrid was WBG 13 x AKU4. These superior combinations can
be utilized further for developing improved blackgram varieties.
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