Type Of Self-incompatibility Research Articles

Effect of acute gamma irradiation on self-incompatibility and related characters in brown sarson

The patterns of response to radiation in three varieties of Brassica campestris var. brown sarson representing different degrees of self-incompatibility was distinctly diverse in M 1, M 2 and M 3 generations for chlorophyll recessives and other quantitative characters including the measures of self-incompatibility. The results have confirmed that changes in the genetic architecture of the irradiated populations are as important as the initial differences for the degrees of self-incompatibility among the parental populations. The studies have shown that it is possible to get a greater response in a direction opposite to the previous history of selection, in both self-compatible and self-incompatible types.

Present position regarding breeding of mango (Mangifera indica L.) in India

Progress of hybridization work at various centres in India is reviewed. With the improved technique of mango hybridization and the report of self-incompatibility in mango, it will be possible to evolve a larger number of hybrids for screening for desirable characters. Embryological studies have shown that in mango pollen tubes grow down the style and effect fertilization but the development of zygote is blocked leading to a sporophytic type of self-incompatibility. Hybrids recently evolved through the combinations of regular and commercial biennial bearing varieties indicate that largescale hybridization may offer a solution to the biennial bearing problem in mango.