Studies on inheritance of Geneic Male Sterility (GMS) and hybrid seed productionin okra [Abelmoschus esculentus (L.) Moench.]
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Society for Promotion of Horticulture
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Inheritance of geneic male sterility in GMS line MS-1 of okra [Abelmoschus esculentus (L.) Moench.] wasstudied using F1, F2 and test-cross generations of crosses between GMS line MS-1 and normal fertile genotypes, andthe varieties Arka Anamika, Parbhani Kranti, Arka Abhay, IIHR-108-1-31, IIHR-109-20-6, IIHR-116-23-6, IIHR-180-6-3, IIHR-161-10-1 and IIHR-130-2-10. All the F1 were found fertile. Segregation of pollen fertility in F2 and test- cross generations involving ms1 was segregated in the ratio 1 fertile: 1 sterile, respectively. This indicated thatGMS trait in the line is controlled by a single recessive gene (ms1ms1). Large-scale F1 hybrid seed production inokra becomes rather slow due to the tedious hand-emasculation, followed by hand-pollination, incurring additionallabour and cost of F1 seed production. In comparison to fertile lines, this saves approximately 70% time and manuallabour. Use of Geneic Male Sterile (GMS) line MS-1 can make F1 hybrid seed production in okra easy and moreeconomical compared to hand-emasculation.
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