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以适宜于湖北地区栽培的5个黑杨优良品种为亲本进行杂交,对杂交子代遗传力、杂种优势表现等进行了分析。结果表明:杂交子代遗传变异丰富,杂种优势显著。苗高、地径生长均属于高遗传力性状。1年根1年秆苗木的苗高、地径的广义遗传力分别为76.74%、85.22%;苗高的一般配合力变量、特殊配合力变量分别为21.56%、78.44%,地径的分别为61.39%、38.61%。2年根1年秆苗木的生长表现与其一致。杨树对锈病、溃疡病、天牛的抗性均受多基因控制。子代的锈病抗性与亲本关系显著,溃疡病和天牛抗性与亲本无显著相关性。以现有的主栽杨树品种的生长为标准进行苗期选择后,杂交子代可获得显著的超亲优势和遗传增益,部分杂交子代的生长量比当前主栽品种有较大提高。
Five elite Poplar varieties cultivated in Hubei Province were used as parents for their hybridization, and their heritability and heterosis performance were analyzed. The results showed that the hybrid progeny had abundant genetic variation and significant heterosis. Seedling height and diameter growth belong to high heritability. The general heritability of seedling height and diameter of stalk seedlings was 76.74% and 85.22% respectively in 1 year and 1 year. The general combining ability variable and special combining ability variable of seedling height were 21.56% and 78.44% 61.39%, 38.61%. The growth of stalk seedlings in 2 years and 1 year was consistent with that. Poplar rust, ulcer disease, the resistance of Beat are controlled by multiple genes. The offspring of rust resistance and parental significant relationship, ulcer disease and resistance of cattle and no significant correlation with parents. After selecting the seedlings for the growth of the existing main poplar varieties, the hybrid progeny can obtain significant super-parents superiority and genetic gain, and the growth of some hybrid progenies is greatly increased compared with the current main cultivars.