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Identification of heterotic groups in South-Asian-bred hybrid parents of pearl millet

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Relation http://oar.icrisat.org/11358/
https://doi.org/10.1007/s00122-019-03512-z
doi:10.1007/s00122-019-03512-z
 
Title Identification of heterotic groups in South-Asian-bred hybrid parents of pearl millet
 
Creator Gupta, S K
Sudarshan Patil, K
Rathore, A
Yadav, D V
Sharma, L D
Mungra, K D
Patil, H T
Gupta, S K
Kumar, R
Chaudhary, V
Das, R R
Anil Kumar, V
Singh, V K
Srivastava, R K
Gupta, R
Boratkar, M
Varshney, R K
Rai, K N
Yadav, O P
 
Subject Pearl Millet
Crop Yield
Genetics and Genomics
 
Description Five hundred and eighty hybrid parents, 320 R- and 260 B-lines, derived from 6 pearl millet breeding programs in
India, genotyped following RAD-GBS (about 0.9 million SNPs) clustered into 12 R- and 7 B-line groups. With few exceptions, hybrid parents of all the breeding programs were found distributed across all the marker-based groups suggesting good diversity in these programs. Three hundred and twenty hybrids generated using 37 (22 R and 15 B) representative parents, evaluated for grain yield at four locations in India, showed significant differences in yield, heterosis, and combining ability. Across all the hybrids, mean mid- and better-parent heterosis for grain yield was 84.0% and 60.5%, respectively. Groups
G12 B × G12 R and G10 B × G12 R had highest heterosis of about 10% over best check hybrid Pioneer 86M86. The parents
involved in heterotic hybrids were mainly from the groups G4R, G10B, G12B, G12R, and G13B. Based on the heterotic
performance and combining ability of groups, 2 B-line (HGB-1 and HGB-2) and 2 R-line (HGR-1 and HGR-2) heterotic
groups were identified. Hybrids from HGB-1 × HGR-1 and HGB-2 × HGR-1 showed grain yield heterosis of 10.6 and 9.3%,
respectively, over best hybrid check. Results indicated that parental groups can be formed first by molecular markers, which may not predict the best hybrid combination, but it can reveal a practical value of assigning existing and new hybrid pearl millet parental lines into heterotic groups to develop high-yielding hybrids from the different heterotic groups.
 
Publisher Springer Verlag
 
Date 2020-01
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11358/1/10.1007_s00122-019-03512-z.pdf
Gupta, S K and Sudarshan Patil, K and Rathore, A and Yadav, D V and Sharma, L D and Mungra, K D and Patil, H T and Gupta, S K and Kumar, R and Chaudhary, V and Das, R R and Anil Kumar, V and Singh, V K and Srivastava, R K and Gupta, R and Boratkar, M and Varshney, R K and Rai, K N and Yadav, O P (2020) Identification of heterotic groups in South-Asian-bred hybrid parents of pearl millet. Theoretical and Applied Genetics (TSI). ISSN 0040-5752