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Genetic architecture of yield components and diversity analysis based on DNA markers in garden pea (Pisum sativum L. subsp. hortense (Neilr.) Asch. &Graebn.)

KrishiKosh

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Title Genetic architecture of yield components and diversity analysis based on DNA markers in garden pea (Pisum sativum L. subsp. hortense (Neilr.) Asch. &Graebn.)
M Sc
 
Creator ARUL, S.
 
Contributor Shri Dhar
 
Subject peas, genetics, genotypes, additives, crossing over, genes, yields, planting, rapd, developmental stages
 
Description T-8642
The knowledge of the nature of gene action for pod yield attributes related to
productivity is important for genetic enhancement of yield using suitable breeding
methodology because the pod yield is a complex character and is associated with
several yield contributing traits. Genetics of yield components of 3 garden pea crosses
(GP 473 × GP 468, GP473 × Arkel and Pusa Pragati × VL 7) were studied through
generation means analysis using 6 parameter model to estimate the nature and
magnitude of gene action in order to formulate breeding strategy for identifying the
segregants with desirable horticultural traits. Generation mean analysis indicated that
additive [d], dominance [h] and at least one of the epistatic effect (additive × additive
[i], additive × dominance [j] and dominance × dominance [l]) were involved in the
inheritance of the traits under study. The results revealed that the nature and
magnitude of gene effects differed in different crosses and showed the importance of
additive as well as non-additive gene effects in the inheritance of different characters
with preponderance of the later. Thus, selection in segregating generation would be
more effective preferably in later generation to reduce the dominance gene effects.
Mostly duplicate type of epistasis was found for most of the traits in all the cross
combinations whose effect can be eliminated by following sophisticated selection
procedure such as restricted selection, modified pedigree method and/or biparental
mating in early segregating generations for the development of high yielding garden
pea varieties with desirable horticultural traits.
 
Date 2016-09-19T16:32:16Z
2016-09-19T16:32:16Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/77496
 
Format application/pdf
 
Publisher IARI, Division of Vegetable Science