Abstract: It is very important to study the genetic diversity of early-maturing cotton for breeding early-maturing cultivar.To improve the prematurity of early-maturing cotton and select right parent combinations,we analysed the genetic diversity of 83 early-maturing cotton germplasms from different ecotypes in China using 35 pairs of SSR primer.As a result,we got 22 pairs of polymorphic primer and 30 allelic variations.The result of NTSYS-pc2.11 analysis indicated that genetic similarity coefficient of the 83 germplasms ranged from 0.73 to 0.98,which showed that there was limited genetic diversity in early-maturing cotton germplasms.The 83 early-maturing cotton germplasms were divided into 2 groups with the genetic similarity coefficient at 0.73,which included 59 and 24 members respectively.We should select parent combinations with distant phylogenetic relationships for early-maturing cotton breeding in future work.

Key words: Early-maturing cotton, Germplasms, SSR marker, Genetic diversity

CLC Number: 

• S562