Record Details

Genetic diversity and association studies for physiological traits under moisture stress conditions in wheat (Triticum aestivum L. Em. Thell)

KrishiKosh

View Archive Info
 
 
Field Value
 
Title Genetic diversity and association studies for physiological traits under moisture stress conditions in wheat (Triticum aestivum L. Em. Thell)
M Sc
 
Creator AMASIDDHA BELLUNDAGI
 
Contributor G. P. Singh
 
Subject proteins, genetic techniques, diseases, genes, recombination, dna, communication technology, enzymes, livestock, electrophoresis
 
Description T-8412
A study was conducted to work out the genetic divergence for morphological
and phenological traits under rainfed conditions. The variance, heritability, genetic
advance, correlation coefficients and path analysis for yield were measured,
phenological and morphological traits under rainfed conditions were recorded. High
estimates of heritability were recorded for number of tillers per meter, days to heading,
thousand kernel weights, early ground cover, chlorophyll content, flag leaf area, protein
percent, and relative water content. Positive and significant correlation was recorded
for number of tillers per meter (0.657*), thousand kernel weight (0.321*), early ground
cover (0.662**), flag leaf area (0.390*), relative water content (0.589**) and canopy
temperature depression (0.698**). The path coefficients were studied for all the traits.
Days to flowering, number of tillers per meter, days to maturity, thousand kernel
weight, early ground cover, flag leaf area, relative water content, canopy temperature
depression had positive direct effects on grain yield per plot. It is concluded that high
heritability estimates were found for number of tillers, days to heading, flag leaf area,
1000-kernel weight, relative water content, chlorophyll content, canopy temperature
depression. Positive and significant correlation was recorded for number of tillers per
meter, thousand kernel weight, early ground cover, flag leaf area, relative water content
and canopy temperature depression. Days to germination, days to maturity, thousand
kernel weight, early ground cover, flag leaf area, relative water content and canopy
temperature depression had direct positive effect on yield both at genotypic and
phenotypic levels across the two environments. This gave the evidence that the scope of
improvement of these characters was enough through the selection process.
All the 294 wheat genotypes were grouped in to six clusters. Among the six
clusters, cluster IV contained eighty six genotypes and cluster I had sixty eight
genotype, while twelve genotypes were included in cluster V. Fifty one genotypes were
grouped in cluster VI and fifty two genotypes were included in cluster II, while cluster
III was represent by twenty seven genotypes. Maximum cluster mean for the character
grain yield per plot was observed for the cluster III (667.1) followed by cluster V
(559.3). The minimum cluster mean under the rainfed conditions was observed for the
cluster IV (269.3). Intra cluster distance was maximum for cluster III (3.125). The
highest inter cluster distance was noted between cluster II and cluster IV (4.997).
Parentage of 294 genotypes revealed that genotypes were belonging to different ecogeographical
areas were included in the same cluster. This indicated that there is no
association between clustering pattern and eco-geographical distribution of genotypes.
x sgwW a ¼fVªfVde ,LVkboe ,y-½ e sa ueh izfrcy vo
 
Date 2016-11-03T09:08:33Z
2016-11-03T09:08:33Z
2011
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/83543
 
Format application/pdf
 
Publisher IARI, DIVISION OF GENETICS