Abstract: In this study we investigated the locum of fertility restorer gene of A₂ cytoplasmic male sterility(CMS) in Sorghum with two cytoplasmic male sterile lines and maintainer lines(A₂V4/B₂V4,A₂TX622/B-2TX622),two restorers(1383-2,Jinliang 5) and F₁ and F₂ populations of three cross classifications(A₂V4×1383-2,A₂V4×Jinliang 5 and A₂TX622×Jinliang 5) by simple sequence repeat(SSR) technique.The results demonstrated that only one SSR marker,Xtxt65 was found to link with fertility restorer gene in F₂ population of A₂Tx622×Jinliang 5 and located in linkage groups(LG) J,the map distance between them was 3.4cM;only one SSR marker,Xtxt141 was found to link with fertility restorer gene in F₂ population of A₂V4×Jinliang 5 and located in LG G,the map distance between them was 13.4cM;no SSR marker was found to link with fertility restorer gene in F₂ population of A₂V4×1383-2.This showed that the fertility restorer genes linked with these two SSR marker were located two independent loci of one restore Jinliang 5,and at least three independent loci in restorers were associated with A₂cMS restoration.

Key words: Sorghum bicolor L.Meonch, CMS, A₂, SSR, Fertility restorer gene

CLC Number: 

• S514.03