毛叶山桐子19个半同胞家系子代苗期遗传测定评价

Genetic Test and Evaluation on Growth Traits of Nineteen Half-sib Families of Idesia polycarpa in the Seedling Stage

为研究不同家系山桐子的生长差异,促进山桐子的开发利用,对19个半同胞家系的山桐子苗期生长性状进行了测定与分析。结果表明:不同家系的山桐子苗期生长性状有较大差异,苗高和地径生长量的变异幅度较大,存在着丰富的遗传变异,有利于家系选择;山桐子家系的苗高、地径和主根长的遗传力分别达到0.94、0.87和0.91,属于高度遗传控制;综合考虑苗高和地径,初步选择出隆亨20号、隆亨27号和汉中6号3个优良家系,具有良好的速生性和较好的适应性。

To study the growth rule of seedlings of Idesia polycarpa Maxim. and to promote the develop- ment and utilization,investigation and analysis were made of growth traits of seedlings of I. polycarpa, from nineteen d^fferent families~ The results showed that there were major differences in growth traits of I. poly- carpa among nineteen different families, and a wide range of variation and a abundant genetic variation ex- isted in the height and ground diameter of seedlings ,which was good for choosing fine famillies. According to the results of correlation analysis, significant positive correlations were found between the height and the seedling ground diameter, and week positive ameter and the root cap. The family heritability of seedling seedling correlations were found between the ground di- height, ground diameter and main root length was 0. 94,0. 87 and 0. 91 respectively,all of them were mainly controlled by their genetic character and belonged to a strong addictive genetic degree selected as fast- growing and good-adapting ling height and ground diameter factors. ~ The family Longheng 20, Longheng 27 and Hanzhong 6 were families according to comprehensively considering the seed-