Linkage analysis of phonotypic traits of Lagerstroemia caudata and L. indica F1 population using SSR markers.

Hereditary variations of plant height, caliper diameter, leaf length, leaf width, and leaf area of 192 F1 individuals generated from a cross between female L. caudate and male L. indica ‘Xiang Xueyun’ were measured and analyzed. Fifty pairs of SSR primers, which were selected from 150 pairs, showed the polymorphisms on both parents and F1 populations and were used to analyze F1 generation. The results indicated that above five phenotypic traits showed a continuous distribution, fitted better with normal distribution curve, and significantly correlated with each other. Using the single factor variance analysis, linkage between phenotypic traits and SSR markers showed that SSR3-153, SSR40-131 and SSR40-137 significantly correlated with leaf width and the contributions were 25.5%, 12.1% and 11.6%; SSR34-158 and SSR34-161 significantly correlated with leaf length and the contributions were 7.8% and 9.1%. SSR10-172 significantly correlated with plant height and diameter, and the contributions were 15.7% and 10.3%.