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利用10年积累的两次调查的59个根蘖型苜蓿无性系资料,分析了根蘖性状的变异系数和广义遗传力。研究结果表明:在根蘖与非根蘖植株杂交F_1代群体中,亲本双方均为有根蘖习性的植株F_1代4年生植株发生根蘖的比率较高(64.2％～76.0％);亲本单方为根蘖植株的F_1代4年生植株根蘖发生率较低(10.7％～53.7％)。根蘖型苜蓿群体的根蘖植株枝条数及其伸展范围的变异幅度较大,距主根颈越远处其变异系数越高,40cm外的变异系数达110.4％～166.4％。苜蓿根蘖植株枝条数及其伸展范围的广义遗传力均较低,分别为20.7％～52.5％和34.9％～46.0％,距主根越远范围内根蘖植株枝条数的广义遗传力越低(20.7％),环境因素对根蘖性状的影响较大。
Based on the data of 59 root-tiller type alfalfa clones collected in two surveys over the past 10 years, the coefficient of variation and general heritability of root-tillering traits were analyzed. The results showed that the ratio of root tillers to 4-year-old F1 plants was the highest (64.2% -76.0%) in the F1 generation with the combination of root tillers and non-root tillers, The root tillers had lower incidence of root tillers in F 1 generation 4-year-old plants (10.7% -53.7%). Root tiller type of alfalfa population root tiller number of branches and its extension range of variation, the greater the distance from the main root of the higher coefficient of variation, 40cm outside the coefficient of variation of 110.4% ~ 166.4%. The broad heritability of alfalfa root tillers and their extension range were low, ranging from 20.7% to 52.5% and 34.9% to 46.0%, respectively. The lower heritability of broad-leaved heritability was 20.7%), environmental factors have a greater impact on the root tillering traits.