Phenotypic and molecular diversity-based prediction of heterosis in pearl millet ( Pennisetum glaucum L. (R.) Br.)

Gupta, S K and Nepolean, T and Shaikh, C G and Rai, K N and Hash, C T and Das, R R and Rathore, A (2017) Phenotypic and molecular diversity-based prediction of heterosis in pearl millet ( Pennisetum glaucum L. (R.) Br.). The Crop Journal (TSI). pp. 1-11. ISSN 22145141 (In Press)

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Abstract

Genetic distances between hybrid parents based on phenotypic traits and molecular markers were investigated to assess their relationship with heterosis for grain and stover yield and other traits in pearl millet (Pennisetum glaucum [L.] R. Br.). Fifty-one hybrids developed using 101 hybrid parents (B and R lines) and showing a wide range of genetic distance between their parents based on eight phenotypic traits and 28–38 SSRs were evaluated in two sets for two seasons. The correlation between Euclidean distance (phenotypic distance, ED) and simple matching distance (molecular distance, SM) for parents of both sets was low but positive and significant (r = 0.2, P < 0.001).The correlation of ED in parents with better-parent heterosis for grain yield was similar in both sets (r = 0.38, P < 0.05). SM was not correlated with heterosis for grain yield in either set of hybrids. The results showed that phenotypic distance could be a better predictor of heterosis than molecular distance. The correlation between phenotypic distance and heterosis was not strong enough to permit the use of phenotypic diversity among parents as a major selection criterion for selection of parental lines displaying high levels of heterosis for grain and stover yield in pearl millet.

Item Type: Article
Divisions: Research Program : Asia
Research Program : West & Central Africa
CRP: CGIAR Research Program on Dryland Cereals
Uncontrolled Keywords: Hybrid parents, Agronomic traits, Euclidean distance, Molecular markers, Simple matching distance, Molecular diversity, Pearl millet
Subjects: Others > Molecular Biology
Mandate crops > Millets > Pearl Millet
Others > Genetics and Genomics
Depositing User: Mr Ramesh K
Date Deposited: 10 Apr 2018 06:37
Last Modified: 10 Apr 2018 06:37
URI: http://oar.icrisat.org/id/eprint/10546
Official URL: http://dx.doi.org/10.1016/j.cj.2017.09.008
Projects: UNSPECIFIED
Funders: ICRISAT-Sehgal Family Foundation Endowment Fund
Acknowledgement: This research was supported by the ICRISAT-Sehgal Family Foundation Endowment Fund (YSFF06) and the CGIAR Research Program on Dryland Cereals. Open Access funded by Institute of Crop Sciences.
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