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 microsporogenesis and genetics of fertility restoration of A4 cytoplasmic-nuclear male-sterility (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
Author Affiliation: Pigeonpea Breeding, International Crops Research Institute for the Semi-Arid Tropics, Patancheru, Andhra Pradesh, India
Subjects: Plant Physiology and Biochemistry > Plant Physiology
Plant Physiology and Biochemistry > Biochemistry
Divisions: Pigeonpea
Depositing User: Syamala
Date Deposited: 10 Jun 2011 06:15
Last Modified: 10 Jun 2011 06:15
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