Crossability between Arachis hypogaea L.and Erectoides species A.sp.9990 GKP

Eighteen cultivars representing five botanical types of Arachis hypogaea L.were se-lected as female parents to cross with A.sp.9990,an Erectoides accession with resistance to mul-tiple diseases and pests.All the crosses failed to produce viable seeds mainly due to embryo abor-tions.Three morphologically different types of embryo abortion were recorded.Marked differ-ences were observed between subspecies,and among botanical types and genotypes in hybrid podproduction and embryo development.In terms of pod production per 100 pollinations,subspeciesfastigiata was superior to subspecies hypogaea,and Valencia and Virginia types performed betterthan Spanish and Peruvian types.Fengqiu Yibazhua and Silihong were among the most acceptablegenotypes by showing higher pod productions and delayed embryo abortions.These results sug-gest that through extensive screenings,particular genotypes with higher crossability or lessincompatibility with A.sp 9990 can be obtained,and the use of such genotypes in

Eighteen cultivars representing five botanical types of Arachis hypogaea L. were selected as female parents to cross with A. sp. 9990,an Erectoides accession with resistance to multiple diseases and pests. All the crosses failed to produce viable seeds mainly due to embryo abortions. Three morphologically different types of embryo abortion were recorded. Marked differences were observed between subspecies,and among botanical types and genotypes in hybrid pod production and embryo development. In terms of pod production per 100 pollinations, subspecies fastigiata was superior to subspecies hypogaea,and. Valencia and Virginia types performed better than Spanish and Peruvian types. Fengqiu Yibazhua and Silihong were among the most acceptable genotypes by showing higher pod productions and delayed embryo abortions. These results suggest that through extensive screenings, particular genotypes with higher crossability or less incompatibility with A. sp 9990 can be obtained,and the use of such genotypes in hybridization program will certainly facilitate the transfer of desirable genes from A. sp. 9990 into the cultivated peanut.