Quantitative Variation and Genetic Divergence in Fodder Rice Bean [Vigna Umbellata (Thunb.) Ohwi and Ohashi]
By: Salu Appan B.
Contributor(s): Suma Bai D I (Guide).
Material type:
BookPublisher: Vellayani Department of Plant Breeding and Genetics, College of Agriculture 2002DDC classification: 630.28 Online resources: Click here to access online Dissertation note: MSc Abstract: I\. research programme was carried out at the Department of Plant
Breeding and Genetics, College of Agriculture, Vellayani during 1999-2000
with the objective of estimating the variability in the important economic
characters and the genetic divergence among the accessions in order to group
them into clusters based on the magnitude of genetic distance using
Mahalanobis 02 statistic. The experiment was conducted using 60 accessions
adopting a randomised block design with two replications. Data collected on
eleven characters were subjected to statistical analysis. Coefficient of
variation, heritability, genetic advance, correlation among the characters, path
coefficient and genetic divergence were estimated.
Analysis of variance revealed significant differences among the
accessions for all the characters except duration of the crop. Phenotypic and
genotypic coefficient of variation were high for leaf weight per plant, number
of leaves per plant and green fodder yield. I ligh heritability coupled with high
genetic advance was observed for plant height, leaf weight per plant, green
fodder yield and dry fodder yield.
Correlation studies indicated that plant height, number of leaves per
plant, leaf area index, leaf weight per plant, dry fodder yield and crude fibre
content exhibited significant positive correlation with green fodder yield.
vii
Leaf weight per plant exhibited the highest positive direct effect on
green fodder yield followed by plant height. Number of branches per plant
and leaf area index recorded negative direct effect on green fodder yield.
Based on the genetic distances computed with respect to ten characters
studied, the 60 accessions of fodder rice bean were grouped into five clusters
while accessions LRB 235, LRB 221, LRB 225, RBL 118 and LRB 145
remained as single. Maximum divergence was obtained between C4 and CID
while divergence was minimum between Cl and C3. Hence, selection of
parents from C4 and CIO will be effective [or an overall improvement of
fodder yield.
viii
| Item type | Current location | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|
Theses
|
KAU Central Library, Thrissur Theses | 630.28 SAL/QU (Browse shelf) | Available | 171997 |
MSc
I\. research programme was carried out at the Department of Plant
Breeding and Genetics, College of Agriculture, Vellayani during 1999-2000
with the objective of estimating the variability in the important economic
characters and the genetic divergence among the accessions in order to group
them into clusters based on the magnitude of genetic distance using
Mahalanobis 02 statistic. The experiment was conducted using 60 accessions
adopting a randomised block design with two replications. Data collected on
eleven characters were subjected to statistical analysis. Coefficient of
variation, heritability, genetic advance, correlation among the characters, path
coefficient and genetic divergence were estimated.
Analysis of variance revealed significant differences among the
accessions for all the characters except duration of the crop. Phenotypic and
genotypic coefficient of variation were high for leaf weight per plant, number
of leaves per plant and green fodder yield. I ligh heritability coupled with high
genetic advance was observed for plant height, leaf weight per plant, green
fodder yield and dry fodder yield.
Correlation studies indicated that plant height, number of leaves per
plant, leaf area index, leaf weight per plant, dry fodder yield and crude fibre
content exhibited significant positive correlation with green fodder yield.
vii
Leaf weight per plant exhibited the highest positive direct effect on
green fodder yield followed by plant height. Number of branches per plant
and leaf area index recorded negative direct effect on green fodder yield.
Based on the genetic distances computed with respect to ten characters
studied, the 60 accessions of fodder rice bean were grouped into five clusters
while accessions LRB 235, LRB 221, LRB 225, RBL 118 and LRB 145
remained as single. Maximum divergence was obtained between C4 and CID
while divergence was minimum between Cl and C3. Hence, selection of
parents from C4 and CIO will be effective [or an overall improvement of
fodder yield.
viii
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