湖北林业科技

Abstracts:The excellent gene resources of 47 half sib families of Catalpa bungei were screened by tests at seedling stage.The results showed that the differences of height and ground diameter growth among half sib families annual seedling were significant. The individual heritability of height was 0.528 6, and family heritability was 0.816 2. While the individual heritability of ground diameter was 0.210 5,family heritability was 0.662 2.The individual heritability of seedling height,family heritability, genetic gain and genetic variation coefficients were much higher than that of ground diameter growth. 25 superior families were selected by index selection method at seedling stage.