STUDY ON GENE ACTION AND FERTILITY RESTORATION IN F1 HYBRIDS INVOLVING CMS LINES AND RESTORER LINES IN PIGEONPEA [Cajanus cajan L. Millsp]
Journal Title: International Journal of Agriculture Sciences - Year 2017, Vol 9, Issue 9
Abstract
Line x tester analysis was carried out involving six newly converted cytoplasmic male sterile lines and five fertility restorer lines for gene action and fertility restoration in pigeonpea [Cajanus cajan L. Millsp.]. Synthesized hybrids were evaluated with check Gujarat Tur Hybrid 1, Gujarat Tur 101 and Vaishali at Sardarkrushinagar. Combining ability analysis revealed presence of both additive and non additive gene effects. The values of average degree of dominance were more than unity (>1) and predictability ratio was less than unity (<1) for all the traits except days to flowering, days to maturity, plant height and biological yield, which indicated preponderance of non-additive gene action. The CMS lines, restorer lines, standard checks and hybrids were tested for fertility restoration by observing the pollen fertility status. The male sterile lines (P1) exhibited 100 per cent pollen sterility. The pollen fertility in fertility restorer lines (P2) varied from 98 to 100 per cent. The F1 generation of all the crosses exhibited consummate fertility restoration with pollen fertility varying from 92 to 100 per cent. Thus it is evident that there were striking differences between the male sterile and male fertile lines for pollen fertility and that of resulting hybrids. Thus the success in development of pigeonpea hybrids largely depends on availability of effective pollen fertility restorer lines for evaluating fertile hybrids.
Authors and Affiliations
NEETU SONI
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