本文通过杂交初步分析一个起源于野生大豆的多小叶性状。五叶大豆与 6个正常大豆配制 6个杂交组合 ,其中 5个 F2 分离群体产生带有主要的 3叶和 5叶 ,少数 4叶 ,个别 6叶或 7叶植株 ,3叶和 5叶 (包括其它多小叶 )表现为 3∶ 1分离 ;1个组合仅产生带有 5叶株和 3叶 ,表现为 6 4∶ 1分离。遗传分析显示 ,除了一个已知的 Lf1基因控制 5叶遗传外 ,可能还存在另外 2个控制 5叶的基因。 5叶多小叶性状基因对正常 3叶是不完全显性的 ,这 3个基因是独立遗传的 ,并且具有重叠效应 In this paper, a multi-leaflet trait originating from wild soybean was primarily analyzed by crossing. Five crosses were made from five-leaf soybean and six normal soybeans, of which five F2-segregating populations produced plants with major 3 and 5 leaves, a few 4 leaves, individual 6 or 7 leaves, 3 leaves and 5 leaves Other multiple leaflets) exhibited a 3: 1 separation; one combination produced only with 5 leaf and 3 leaves, exhibiting a 6: 1 separation. Genetic analysis showed that in addition to a known Lf1 gene controlling 5-leaf genetic, there may be two other genes that control 5-leaf. The 5-leaflet trait gene is not completely dominant to the normal 3-leaf. These 3 genes are independently inherited and have overlapping effects