Genetics and morphological studies of genetic male sterile lines in diploid cotton (Gossypium arboreum L.).

摘要

The large F₂ populations of two Asiatic cotton genetic male sterile genotypes (Hisar GMS and SRT 1 GMS) were evaluated during kharif, 2009 for morphological and inheritance studies. The male sterile plants did not show significant differences from the male fertile counterparts for plant morphological traits such as plant height and leaf area. But both the GMS populations exhibited significant differences between male sterile and fertile plants with respect to flower morphological traits viz., flower pedicel length, staminal column length, style length, filament length and anther number with each trait having lower mean values in male sterile plants and higher mean values in fertile plants of both SRT 1 GMS and HISAR GMS populations. The F₂ segregating plants scored for male sterility and fertility based on the dichotonomous criteria revealed that genetic male sterility in both the genotypes is governed by the single recessive gene.