Cytogenetic studies in A4 cytoplasmic-nuclear male-sterility system of pigeonpea

Dalvi, V A and Saxena, K B and Madrap, I A and Ravikoti, V K (2008) Cytogenetic studies in A4 cytoplasmic-nuclear male-sterility system of pigeonpea. Journal of Heredity, 99 (6). pp. 667-670.

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Efforts were made to study icrosporogenesis and genetics of fertility restoration of A4 cytoplasmic-nuclear malesterility (CMS)system in pigeonpea. The process of microsporogenesis in the male-sterile (ICPA 2039) and its maintainer (ICPB 2039) plants was normal up to the tetrad formation stage. The tapetal cells in the male-sterile anthers degenerated soon after tetrad formation, resulting in shriveled and degenerated microspores. In the maintainer plants, the tapetal cells were normal and microspores were functional. The breakdown of the tapetum before the completion of microsporogenesis was the major cause for the expression of male sterility in A4 CMS system. The studies on the inheritance of fertility restoration showed that in 3 crosses, a single dominant gene; in 1 cross, 2 duplicate genes; and in another cross, 2 complimentary genes governed the fertility restoration.

Item Type: Article
Subjects: Mandate crops > Pigeonpea
Depositing User: Library ICRISAT
Date Deposited: 07 Oct 2011 05:52
Last Modified: 07 Oct 2011 05:52
Official URL:
Acknowledgement: UNSPECIFIED
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