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GENETIC VARIABILITY AND DIVERGENCE STUDIES BY D2 STATISTICS AND RAPD ANALYSES IN FIELD BEAN (Lablab purpureus L. Sweet)

KrishiKosh

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Title GENETIC VARIABILITY AND DIVERGENCE STUDIES BY D2 STATISTICS AND RAPD ANALYSES IN FIELD BEAN (Lablab purpureus L. Sweet)
 
Creator BELAGHIHALLI NANJAPPA GNANESH
 
Contributor REDDI SEKHAR, M
 
Subject GENETIC, VARIABILITY, DIVERGENCE, STUDIES, D2, STATISTICS, RAPD, ANALYSES, FIELD, BEAN
 
Description The present investigation was carried out during Kharif
2004 to study the genetic divergence, genetic parameters,
character associations and path-coefficient analysis in 64 field
bean genotypes. In addition RAPD analysis was carried out for
15 selected genotypes of field bean based on D2 analysis. The
experiment was laid out at Dryland Farm of S.V. Agricultural
College, Tirupati in a randomized block design, with three
replications. Data was recorded on 12 quantitative characters.
Analysis of variance indicated the existence of significant
genotypic differences for all the 12 attributes. The genotypes viz.,
GA 40-3, GA 16-3, GA 48, GA 28-10, GA 22-9 and Madarabavi
gudda showed high mean performance for pod yield as well as for
most of yield components.
The analysis of genetic parameters revealed higher phenotypic
and genotypic coefficients of variation, heritability and genetic
advance as per cent of mean for inflorescences per plant, pod yield
per plant, pods per plant, days to first flowering and plant height.
Genetic divergence studies by Mahalonobis’s D2 analysis
revealed considerable variability among the 64 genotypes and were
grouped into 11 clusters. The results revealed that the geographic
diversity might not always be related to genetic diversity. The
characters pod yield per plant and plant height contributed
maximum towards genetic divergence and this was confirmed by
canonical analysis.
RAPD analysis detected a high level of genetic variation
among the 15 field bean genotypes selected from different clusters
formed from D2 analysis. A high degree of polymorphism was
obtained with the primers OPM 20 (11 bands), OPM 1 (9 bands)
and OPM 3 (9 bands). The similarity index values ranged from
0.286 to 0.897 indicating a wide range of genetic diversity.
Character association studies indicated the significant
positive correlation of pods per plant, 100-seed weight, seeds per
pod, days to first flowering, days to maturity, pod length, plant
height and inflorescences per plant with pod yield and also among
themselves. Path co-efficient analysis revealed that pods per plant,
100-seed weight and seeds per pod are important yield
components having direct bearing on the improvement of pod
yield.
 
Date 2016-08-19T11:41:14Z
2016-08-19T11:41:14Z
2005
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/72964
 
Language en
 
Relation D7727;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD