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Assessment of cytoplasmic differences of near-isonuclear male-sterile lines in pearl millet



Assessment of cytoplasmic differences of near-isonuclear male-sterile lines in pearl millet



Tag. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik 87(1-2): 106-112



Four near-isonuclear polycytoplasmic versions of 81A and two of Pb 402A male-sterile lines of pearl millet (Pennisetum typhoides) were used in factorial matings with five inbred male testers in different combinations in three sets. The cytoplasmic differences were studied for several agronomic traits using mean values and general combining effects (gca) of male-sterile lines, and specific combining ability effects of hybrids. The fertility/ sterility behaviour of different male-sterile lines in crosses with common male parents was also studied. Significant differences among near-isonuclear polycytoplasmic lines were observed in mean values for a few traits such as plant height, leaf length and peduncle length, but the differences for combining ability were more pronounced. The A3 cytoplasm was a better general combiner than the A2 cytoplasm for grain yield and both A2 and A3 cytoplasms were better general combiners for leaf length and peduncle length. In addition, superiority of A3 cytoplasm for gca was observed for plant height and ear characters over the A2 cytoplasm in set II. A differential behaviour of cytoplasms, both in combination with a common pollinator and across pollinators, was observed for several traits. The results provide evidence for the distinctiveness of different cytoplasmic sources in pearl millet and for the influence of cytoplasmic factors on the phenotypic expression of nuclear genes. A diversification of male sterility sources in the breeding of pearl millet hybrids is suggested.

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Accession: 002305829

Download citation: RISBibTeXText

PMID: 24190201

DOI: 10.1007/bf00223753


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