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Creation of genetic variability and early generation evaluation for yield and yield related traits in lentil (Lens culinaris Medik.)

KrishiKosh

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Title Creation of genetic variability and early generation evaluation for yield and yield related traits in lentil (Lens culinaris Medik.)
Ph.D.
 
Creator YERASU SURESH REDDY
 
Contributor A. Talukdar
 
Subject Transgressive segregation, Variability, PCV & GCV, Heritability, Genetic advance.
 
Description T-8753
Lentil (Lens culinaris Medik) is a bushy annual plant of the legume family, grown
for its lens-shaped seeds. For genetic improvement and yield enhancement in local
lentil genotypes through introgression of yield related traits from exotic germplasm,
twelve crosses were attempted and F2 populations were analyzed. Enormous genetic
variability was created as expressed in terms of range, mean and the coefficient of
variations in the F2 populations. Though many F2 populations performed poorly for
number of primary branches, number of pods and seed yield per plant, the crosses
viz., L-830 × P-1117, JL-3 × P-22211 and SKL-259 × P-22211prodused higher
percentage of transgressive segregants with desirable traits. All the five indigenous ×
indigenous crosses recorded higher transgressive segregants for seed index along
with two (JL-3 × P-22211 and SKL-259 × P-22211) indigenous × exotic crosses.
The twelve F2 populations were evaluated for nine characters to study variability,
coefficients of variation, heritability and genetic advance. Phenotypic coefficients of
variation (PCV) were greater than genotypic coefficient of variation (GCV) for all
the traits studied. Days to 50% flowering and days to maturity manifested high
heritability coupled with low GCV and genetic gain indicating requirement
selections for several successive generations for their improvement. Low to medium
heritability accompanied by high genetic advance, PCV and GCV were observed for
seed yield per plant. High heritability accompanied by moderate to high GCV and
genetic gain were observed for number of 100-seed weight, seeds per pod followed
by pods per plant, number of primary branches per plant, and plant height which
could be improved by simple selection in early generations. The study thus exhibited
the possibilities of improving lentil genotypes through introgression of useful traits
from exotic and indigenous germplasm.
Key words: Transgressive segregation, Variability, PCV & GCV, Heritability,
 
Date 2016-08-27T09:56:57Z
2016-08-27T09:56:57Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/74006
 
Format application/pdf
 
Publisher IARI,Division of Genetics