Genetics of Fertility Restoration in A4-Based, Diverse Maturing Hybrids of Pigeonpea [Cajanus cajan (L.) Millsp.]

    Saxena, K B and Sultana, R and Saxena, R K and Kumar, R V and Sandhu, J S and Rathore, A and Kavi Kishor, P B and Varshney, R K (2011) Genetics of Fertility Restoration in A4-Based, Diverse Maturing Hybrids of Pigeonpea [Cajanus cajan (L.) Millsp.]. Crop Science, 51. pp. 574-578. ISSN 0011-183X

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    Abstract

    Recently, a breeding technology for hybrid pigeonpea [Cajanus cajan (L.) Millsp.] based on cytoplasmic-nuclear male sterility (CMS) and partial natural outcrossing was developed at ICRISAT. The limited number of experimental hybrids tested has shown the presence of a considerable amount of hybrid vigor for seed yield. In the present study, one extra-early- (120 d), two early- (150 d), and two late-maturing (180 d) pigeonpea hybrids were studied to generate information on the genetics of fertility restoration of the A4 CMS system. In the extra-earlymaturing hybrids, pollen fertility was controlled by a single dominant gene, whereas in the earlyand late- maturing hybrids, male fertility was governed by two duplicate dominant genes. It was also observed that hybrids with two dominant genes produced a greater pollen load and expressed greater stability as compared with those carrying a single dominant gene. The information on the inheritance of fertility restoration will help in designing strategies for breeding elite hybrid parents, and it was concluded that for breeding hybrids with stable fertility restoration, the presence of two dominant genes is essential.

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Agro Tags: <b>Agrotags</b> - fertilizers | hybrids | equipment | genes | sire evaluation | planting | crossing over | segregation | crops | dominant genes <br><b>Fishtags</b> - pearls <br><b>Geopoliticaltags</b> - india | marches | punjab
    Subjects: Mandate crops > Pigeonpea
    Depositing User: Siva Shankar
    Date Deposited: 16 May 2011 04:29
    Last Modified: 16 Sep 2013 09:10
    URI: http://oar.icrisat.org/id/eprint/5
    Official URL: http://dx.doi.org/10.2135/cropsci2010.07.0440
    Projects: UNSPECIFIED
    Funders: Government of India National Food Security Mission, Bill and Melinda Gates Foundation
    Acknowledgement: The authors are thankful to the National Food Security Mission,the government of India, and the Bill and Melinda Gates Foundation (through the Tropical Legume II Project) for providing financial support to conduct this research
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