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The Journal of Heredity 2001:92(5)
© 2001 The American Genetic Association 92:437-439

Brief Communication

Genetics of a New Male-Sterility Locus in Pigeonpea (Cajanus cajan [L.] Millsp.)

K. B. Saxena, and R. V. Kumar

From the Genetic Resources and Enhancement Program, International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru 502 324, A. P. India.

Address correspondence to K. B. Saxena at the address above or e-mail:k.saxena{at}cgiar.org.

A natural male-sterile mutant was found in the population of a short-duration pigeonpea (Cajanus cajan[L.] Millsp.) cultivar ICPL 85010. This mutant is characterized by light yellow anthers of reduced size that are devoid of pollen grains. This mutant was crossed with two pigeonpea cultivars to study its inheritance. The F1, F2, and test cross data of the two crosses suggested that this male sterility trait is genetic in origin and is controlled by a single recessivegene. The F1 (mutant x ICPL 85010) plants were crossed with translucent (ms1) and arrowhead type (ms2) genetic male steriles reported earlier to study their allelic relationships. Segregation in the three-way cross F1 and F2 populations revealed that the mutant male-sterile gene was nonallelic to ms1 and ms2 loci and it is designated ms3. The new male sterility sources in pigeonpea will help in producing high-yielding hybrids and populations in diverse phenological groups.


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