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Genetic diversity analysis among advanced breeding lines in pearl millet for grain iron, zinc and agronomic traits

OAR@ICRISAT

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Relation http://oar.icrisat.org/11283/
 
Title Genetic diversity analysis among advanced breeding lines in pearl millet for grain iron, zinc and agronomic traits
 
Creator Pujar, M
Gangaprasad, S
Govindaraj, M
Kanatti, A
 
Subject Plant Breeding
Pearl Millet
Genetics and Genomics
 
Description Evaluation of genetic diversity within breeding populations will help in parents’ diversification
and identification of trait-specific inbred sources. Total of 294 inbreds were evaluated for
grain iron (Fe), zinc (Zn) and agronomic traits in two contrasting seasons using alpha-lattice
field design. There was a significant variability observed for all traits. Three-to-four-fold
variability noticed for Fe (31-120 mg kg-1), Zn (19-88 mg kg-1), yield (0.6-2.6 tha-1) and 1000-
grain weight (6-16 g 1000-1). The magnitude of genetic coefficient of variation explained by
traits were varied in the order of Fe (25%)>Zn>TGW>PL>PH>GY>PG>DF (7%) and
heritability (broad sense) was very high as >84% for all traits except grain yield (56%). Nine
clusters formed at 90% genetic similarity. Clusters I to IV and VII had higher mean value for
Fe density (78-100 mg kg-1) and agronomic traits. Highest number of genotypes grouped in
cluster I (63) followed by cluster III (54) having higher yield,1000-grain weight, panicle girth,
Fe and Zn. Top-10% of high-Fe lines had significantly higher Fe (64%), Zn (49%), grainweight
(29%) and panicle girth (19%) than bottom-10% genotypes. This implies that high-
Fe/Zn sources are available with eliteness and can be incorporated into any genetic
background without compromising agronomic superiority. Higher heritability and genetic
advance as percentage of mean were observed for Fe, Zn and grain-weight suggesting
these traits are predominantly determined by additive gene and can be improved through
selection.
 
Date 2018-12
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11283/1/2018_Pujar%20et%20al.%2C%202018_Conf_NGC2018_page102-103.pdf
Pujar, M and Gangaprasad, S and Govindaraj, M and Kanatti, A (2018) Genetic diversity analysis among advanced breeding lines in pearl millet for grain iron, zinc and agronomic traits. In: 1st National Genetics Congress on Genetics for Sustainable Food, Health and Nutrition Security, December 14-16, 2018, ICAR-lndian Agricultural Research Institute, New Delhi, India.