Effect of cytoplasm and cytoplasm-nuclear interaction on combining ability and heterosis for agronomic traits in pearl millet {Pennisetum glaucum (L) Br. R}.

Chandra-Shekara, A.C. and Prasanna, B.M. and Singh, B.B. and Unnikrishnan, K.V. and Seetharam, A. (2007) Effect of cytoplasm and cytoplasm-nuclear interaction on combining ability and heterosis for agronomic traits in pearl millet {Pennisetum glaucum (L) Br. R}. Euphytica, 153 (1-2). pp. 15-26.

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Abstract

Cytoplasmic male sterility (CMS) is considered an efficient genetic tool in pearl millet hybrid breeding. Of the several CMS sources available in pearl millet, A1 is the only CMS widely exploited to produce commercial hybrids in India. To explore the possibility of using alternate CMS sources, we studied the cytoplasmic effects of different CMS sources on agronomic characters in pearl millet. Five CMS (A) lines representing A1, A2, A3, A4 and A5 cytoplasms, their respective maintainer (B) lines and eight restorer (R) lines were used to generate 40 A × R and B × R experimental crosses. The experimental material was evaluated at two different locations in India. Analysis of combining ability and heterosis revealed that A4 and A5 cytoplasms had desirable effects for earliness. The A5 CMS was found to be particularly promising, as compared to other CMS sources for improving grain yield. The study also indicated that the cytoplasmic effects on general combining ability (GCA) for various agronomic characters were largely non-significant. However, cytoplasmic effects on specific combining ability and heterosis were found to be modulated by cytoplasmic-nuclear interactions and influenced by the environmental conditions. The study also demonstrated the advantage of utilizing diverse male-sterile and restorer combinations in maximizing the productivity as well as for genetic and cytoplasmic diversification of hybrids in pearl millet

Item Type: Article
Uncontrolled Keywords: Cytoplasmic male sterility combining ability heterosis pennisetum glaucum Introduction
Author Affiliation: Division of Genetics, Indian Agricultural Research Institute, New Delhi 110 012, India
Subjects: Crop Improvement
Divisions: Millet
Depositing User: Mr B Krishnamurthy
Date Deposited: 10 Jan 2012 05:31
Last Modified: 10 Jan 2012 05:34
Official URL: http://dx.doi.org/10.1007/s10681-006-9194-4
URI: http://eprints.icrisat.ac.in/id/eprint/2958

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