Development of F_1 and BC_1F_1 interspecific hybrids of O. sativa cv. Savitri / O.brachyantha to introgress yellow stem borer resistance genes into cultivated rice

摘要

In the present study an attempt has been made to introgress yellow stem borer resistance genes from O. brachyantha (FF) to cultivated rice through development of F_1 and BCjF'y interspecific hybrids of O. sativa cv Savitri / 0. brachyantha. The morpho-cytological characterization of the hybrids was done in order to know the phenotypic characters of the interspecific hybrids and cytological behavior of the chromosomes. The data revealed that in general morphologically, the F_1 was intermediate betweenthe donor and recipient parents. In F_1 interspecific hybrid no chromosome pairing was observed, where as in BC_1F_1 presence of 0-2 trivalents and bivalents was observed.