Inheritance and linkage studies in soybean

Inheritance of nine morphological characters in six crosses of soybean revealed hypocotyl colour (Hphp), petal colour (W₁w₁), leaf let shape (Ln₂ln₂), growth habit (Dt₁dt₁), pubescent pods (P₂P₂) and pod shattering (Sh₁sh₁) each to be governed by a single gene whereall, seed coat colour (GtG₂gtg₂) and defective seed coat (De₁De₂de₁de₂) were under digenic control. Pod colour (L₁L₂l₁l₂) gave monogenic and digenic segregation in different crosses. Out of 122 joint segregations, significant linkages was observed in 35 cases with the crossing over values for differentgene pairs in the range of 1.08–46.60%. Based on the pooldata of straight and reciprocal crosses three gene maps are constructed. Linkage association for the characters, viz., hypocotyl colour, leaflet shape, growth habit, pod shattering, etc. could not be established.