黑杨派杨树不同杂交组合F_1代遗传分析及苗期选择  

F_1 Genetic Analysis and Seedling Selection of Different Cross Combinations of Black Poplar

作　　者：王瑞文[1] 黄国伟[1] 李振芳[1] 陈慧玲[1] 彭婵[1] 张新叶[1] 

机构地区：[1]湖北省林业科学研究院,武汉430075

出　　处：《中国农学通报》2017年第10期48-52,共5页Chinese Agricultural Science Bulletin

基　　金：湖北省科技厅技术创新专项重大项目"速生丰产人工林可持续生产关键技术研发"(2016ABA111)

摘　　要：为获得适合长江中下游江汉平原发展的杨树新品种,以黑杨派不同杨树品种为亲本进行杂交试验,测定并分析了杂种F1代苗期的生长性状和表型变异系数、遗传变异系数、重复力等遗传参数。结果表明:Fl代杂种优势显著,苗高变异幅度为2.9~5.7 m;地径变异幅度为13.5~52.0 mm;不同杂交组合苗高的重复力在16.7%~56.3%之间,地径的重复力在30.7%~64.7%之间,同一杂交组合地径重复力大于苗高。经过综合评价,初步从6个杂交组合中筛选出234个优良无性系,选择后苗高平均遗传增益为6.7%,地径平均遗传增益10.8%,将进一步开展大田造林对比试验,对选出无性系进行综合评价。In order to obtain new poplar varieties suitable for Jianghan Plain in the middle and lower reaches of the Yangtze River, different varieties of black poplar used as parents were selected to hybrid. The growth traits and genetic parameters, such as phenotypic coefficient of variation, genetic coefficient of variation and repeatability, were determined and analyzed at the seedling stage of FI hybrid progenies. The results showed that F~ generation showed obvious hybrid vigor. The variation range of seedling height and ground diameter was 2.9-5.7 m and 13.5-52.0 ram, respectively. The repeatability of seedling height and ground diameter was 16.7%-56.3% and 30.7%-64.7%, respectively, while the repeatability of ground diameter was higher than that of the seedling height in the same hybridized combination. A total of 234 clones from 6 cross combinations were selected through comprehensive evaluation. Average genetic gain of seedling height and ground diameter of selected clones were 6.7% and 10.8%, respectively, which meant they could be applied to comparative evaluation in the comparative experiment of field afforestation in the future.

关 键 词：杨树 杂交 苗期测定 重复力 遗传增益 

分 类 号：S792.11[农业科学—林木遗传育种]