Combining Ability For Drought Tolerance and Yield IN Blackgram
By: Roy Isac Varghese.
Contributor(s): Abdul Khader K M (Guide).
Material type:
BookPublisher: Vellayani Department of Plant Breeding and Genetics, College of Agriculture 1997DDC classification: 630.28 Online resources: Click here to access online | Click here to access online Dissertation note: MSc Abstract: A research programme consisting of five drought tolerant lines, three
high yielding testers and their fifteen hybrids was carried out at the Department
of Plant Breeding, College of Agriculture, Vellayani, during 1996-97, to
evaluate the combining ability and gene action for drought tolerance, yield and
related characters in blackgram. The lines and testers were selected based on
previous performance and crossed and subjected to line x tester analysis and
data recorded on both yield and drought related characters. Significant
difference among the treatments was observed for all characters. Differences
among parents were observed for all characters except number of branches
per plant and number of pods per plant. Crosses were significantly different
for all the characters. Therefore combining ability analysis was carried out for
all characters. Specific combining ability variance was significant for all traits
except number of branches per plant indicating the importance of non additive
gene action. Both additive and non additive gene action were found to be
involved for duration of the crop, number of pods per plant and grain yield per
plant. However in all cases non additive gene action was predominant.
Among lines, T 9 emerged as the best general combiner for various yield
and drought related characters. The line, CoBG 302 was also found to be a
better general combiner for various characters. Among testers, WBG 67
proved to be the best general combiner followed by VB 11. No specific cross
combination was found to be significantly different for all the traits together.
However the cross PDU 101 x WBG 67, CoBG 302 x CoBG 303 and T 9 x
VB 11 were found to be the better specific combiner, when all the characters
are considered.
In short on the basis of combining ability estimated the lines T 9 and
CoBG 302? the testers WBG 67 and VB 11 and the hybrids PDU 101 x
WBG67, CoBG 302 x CoBG 303 and T 9 x VB 11 were suggested for further
utilization for improvement.
| Item type | Current location | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|
Theses
|
KAU Central Library, Thrissur Theses | 630.28 ROY/CO (Browse shelf) | Available | 171278 |
MSc
A research programme consisting of five drought tolerant lines, three
high yielding testers and their fifteen hybrids was carried out at the Department
of Plant Breeding, College of Agriculture, Vellayani, during 1996-97, to
evaluate the combining ability and gene action for drought tolerance, yield and
related characters in blackgram. The lines and testers were selected based on
previous performance and crossed and subjected to line x tester analysis and
data recorded on both yield and drought related characters. Significant
difference among the treatments was observed for all characters. Differences
among parents were observed for all characters except number of branches
per plant and number of pods per plant. Crosses were significantly different
for all the characters. Therefore combining ability analysis was carried out for
all characters. Specific combining ability variance was significant for all traits
except number of branches per plant indicating the importance of non additive
gene action. Both additive and non additive gene action were found to be
involved for duration of the crop, number of pods per plant and grain yield per
plant. However in all cases non additive gene action was predominant.
Among lines, T 9 emerged as the best general combiner for various yield
and drought related characters. The line, CoBG 302 was also found to be a
better general combiner for various characters. Among testers, WBG 67
proved to be the best general combiner followed by VB 11. No specific cross
combination was found to be significantly different for all the traits together.
However the cross PDU 101 x WBG 67, CoBG 302 x CoBG 303 and T 9 x
VB 11 were found to be the better specific combiner, when all the characters
are considered.
In short on the basis of combining ability estimated the lines T 9 and
CoBG 302? the testers WBG 67 and VB 11 and the hybrids PDU 101 x
WBG67, CoBG 302 x CoBG 303 and T 9 x VB 11 were suggested for further
utilization for improvement.
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