中文摘要：

利用花生RIL群体，分析了11个花生根部性状的遗传力，估算基因对数及性状间的相互关系，根据偏度系数（g1）和峰度系数（g2）估算控制性状的基因互作情况。结果表明：11个性状都是受多基因控制的数量性状，在RIL群体中基因型间的差异均表现为连续变异和明显的超亲分离。侧根干重的遗传力最高达0．60，其次是侧根鲜重，为0.58，而其他性状的遗传力均较低。控制主根长性状的多基因间存在互作，互作方式为重叠作用；控制主根粗（3cm）性状的基因间也存在一定的重叠作用，但是作用不明显；控制其他性状的基因都存在互作，表现为互补作用，但互补作用的强弱有差异。主根粗（1cm）、主根粗（3cm）、主根干重、主根鲜重、侧根干重和侧根鲜重之间都显著或极显著相关；根体积与主根粗（1cm）、主根粗（3cm）、侧根干重和侧根鲜重显著或极显著相关。

英文摘要：

Heritability of 11 peanut root traits of a RIL population was analyzed. And number of genes controlling the characters was evaluated, relationship of the traits was estimated, and genes interaction of controlling the root characters was studied based on their skewness and kourtosis values. The results revealed that all of the tested traits in RIL populations showed continuously variation and large aggressive segregation. Peanut root characters were quantitative traits genetically controlled by polygenes. There were about 10 genes controlling nodule number of lateral and axial root and dry weight of lateral root ; there were about 5 - 8 genes in other characters. Except for dry weight of lateral root （h = 0.60） and fresh weight of lateral root （h = 0.58）, the heritability of the others was under 0.50 in the RIL population. At the same time, gene interaction was observed in some of characters, transgressive segregation gene interaction was observed in polygenes controlling length of axial root and thickness of root base （ 1cm）, complementary gene interaction was significantly detected in nodule number of lateral root and dry weight of lateral root and nodule number of lateral root, but not detected or significant in the others. There was significant correlation between dry weight of axial and lateral root, thickness of root base （1 cm） and root base （3 cm）, fresh weight of axial and lateral root. There was significant correlation between root volume and thickness of root base （ 1 cm） and root base （3 cm） , fresh and dry weight of lateral root too.