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Genetic variation and diversity for grain iron, zinc, protein and agronomic traits in advanced breeding lines of pearl millet [Pennisetum glaucum (L.) R. Br.] for biofortification breeding

OAR@ICRISAT

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Relation http://oar.icrisat.org/11624/
https://doi.org/10.1007/s10722-020-00956-x
doi:10.1007/s10722-020-00956-x
 
Title Genetic variation and diversity for grain iron, zinc, protein and agronomic traits in advanced breeding lines of pearl millet [Pennisetum glaucum (L.) R. Br.] for biofortification breeding
 
Creator Pujar, M
Govindaraj, M
Gangaprasad, S
Kanatti, A
Shivade, H
 
Subject Plant Breeding
Pearl Millet
Plant Nutrition
Seeds/Seed Bank
 
Description Genetic improvements of iron (Fe) and
zinc (Zn) content in pearl millet [Pennisetum glaucum
(L.) R. Br.] may reduce the problems of anemia and
stunted growth among millet dependent staple food
consumers. The availability of variation in diversebreeding
lines is essential to improve grain micronutrients
in high-yielding cultivars. This study aimed to
determine the extent of variability, heritability and
diversity for grain Fe, Zn and protein, along with key
agronomic traits, in 281 advanced breeding lines bred
at ICRISAT and evaluated across two seasons (environments).
A pooled analysis of variance displayed
significant variation for all these traits. Highest
variability was recorded for Fe (35–116 mg kg-1),
Zn (21–80 mg kg-1), and protein (6–18%), and a
three-fold variation was observed for panicle length,
panicle girth and 1000-grain-weight (TGW). Diversity
analysis showed 10 clusters. Cluster-III had maximum lines (25%) and Cluster-V showed the highest mean
values for Fe, Zn, protein and TGW. These results
highlight the success of breeding program that aimed
both the maintenance and creation of genetic variability
and diversity. A significant positive correlation
among Fe, Zn, protein and TGW indicated the
potential for simultaneous improvement. Grain yield
had a non-significant association with Fe and Zn,
while protein showed a negative correlation. These
results suggest that significant variability exists in
elite-breeding lines, thus highlighting an opportunity
to breed for biofortified varieties without compromising
on the grain yield. The lines with high Fe, Zn and
protein content can be used as hybrid parents and may
also help in further genetic investigations.
 
Publisher Springer
 
Date 2020-05
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11624/1/GRACE%20iron%20zinc%20protein%20and%20agronomic%20traits%20Final%201.pdf
Pujar, M and Govindaraj, M and Gangaprasad, S and Kanatti, A and Shivade, H (2020) Genetic variation and diversity for grain iron, zinc, protein and agronomic traits in advanced breeding lines of pearl millet [Pennisetum glaucum (L.) R. Br.] for biofortification breeding. Genetic Resources and Crop Evolution (TSI). ISSN 0925-9864