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Bharathi et al. (1982) have analysed the cytological and embryological behaviour of triploid inter-specific hybrids btween 9 cultivated varieties of Arachis hypogaea L. and A. chacoense Krap. et Greg. nom. nud. (PI 276235) a diploid wild species with recorded resistance to leaf spot, rust, thrips and aphids. Based on the occurrence of restitution of chromosomes on the female side, they concluded that production of triploid hybrids, selection for fertile types and isolation of desirable types provides a rapid method for alien incorporation in groundnut. Subsequently triploid hy brids were obtained from crosses of A. hypogaea with two more diploid species A. correntina (Burk) Krap. et Greg. nom. nud. (PI 331194) and A. villosa Benth and in the present study results of cytological analysis of these triploids, and their deriva tives consisting of tetraploids, pentaploids and hexaploids have been presented.

Inter specific gene transfer in Arachis hypogaea L, in relation to the Behaviour of Triploid, pentaploid and hexaploid derivatives.