title: Analysis of genetic distance  by SSR in waxy maize.
abstract: We  examined the genetic diversity of 80 inbred waxy maize lines using 22 SSR  molecular markers that could be used to achieve heterosis in waxy maize. Eighty  inbred waxy maize lines with different phenotypes, 40 yellow, 25 white, 13  black, and two red lines were analyzed by SSR molecular marker fingerprint and  cluster analysis. Using a standard genetic distance of 0.55, the 80 waxy maize  inbred lines were clustered into nine groups. Among them, group II, group V,  groups VII and VIII, and group IX were divided into three subgroups at a  genetic distance of 0.46, into two subgroups at 0.49, into two subgroups at  0.46, and into four subgroups at 0.493, respectively. All but one of the yellow  waxy maize inbred lines were clustered in groups VI, VII, VIII, and IX. Group  IX (30 lines) contained 28 yellow lines; the other 11 yellow lines were  distributed among groups VI, VII and VIII. Among the 25 white lines, 21 were clustered  in groups III, V, VI and the third subgroup of group II. The black line N72 was  in a group of its own. The black lines N75, N76 and N78 were distributed in  groups VII, VIII and IX, respectively. The other nine black lines were  clustered in group II. The red lines were distributed in the second subgroup of  group II and there was no difference in genetic distance between them. In  conclusion, there were considerable genetic differences among waxy maize inbred  lines of different colors. The mean genetic distance of inbred lines of the  same color was significantly less than that of lines of different colors.  Therefore, we concluded that it was more accurate to determine the difference  between the populations using the highly stable DNA genetic markers.
authors.affiliation: College of Agronomy, Jilin Agricultural University, Changchun, China. yuronghai2011@163.com
authors.forename: R H
authors.initials: RH
authors.lastname: Yu
authors.forename: Y L
authors.initials: YL
authors.lastname: Wang
authors.forename: Y
authors.initials: Y
authors.lastname: Sun
authors.forename: B
authors.initials: B
authors.lastname: Liu
mesh_terms: D018744:DNA, Plant / Q000235:genetics*; D005819:Genetic Markers; D014644:Genetic Variation; D006823:Hybrid Vigor / Q000235:genetics; D007178:Inbreeding; D018895:Microsatellite Repeats; D010641:Phenotype; D003313:Zea mays / Q000235:genetics*
chemical_list: D018744:DNA, Plant; D005819:Genetic Markers