Abstract:

Abstract: To understand the relationship among species, this paper research on heredity trend of morphological characters of tomato germplasm resource.The experiment hopes to provide theoretical basis for the exploitation of tomato germplasm resources. Inheritance of some characters including stem length, foliage index, canopy were studied with 50 jianhuang,47（A-6t）,93-29,A33-1,46（A-10t）,93-11,A-17,49（7-1t）,48(7t)and F1 progenies from 93-29×A33-1,50jianhuang×47（A-6t）,46（A-10t）×93-11,50jianhuang×A-17,93-11×49（7-1t）,3-11×48（7t）.Results show that(1)There existed commonly the heterosis in crosses of 93-29×A33-1 in stem length.The other five species show the mid-parent heterosis.(2)There also existed the heterosis in crosses of 93-29×A33-1,93-11×48（7t）,93-11×49（7-1t）,50jianhuang×A-17 93-29×A33-1 in canopy,and,The cross-breeding method to increase canopy is feasible.(3)There existed the heterosis in crosses of 93-11×48(7t)and 50jianhuang×A-17 in foliage index, the other four combinations show the mid-parent heterosis.(4)F1 progenies from 93-29×A33-1 and 93-11×49(7-1t) are resistant to bacterial wilt of tomatoes.The cross- breeding can change the partial morphological characters of the tomato, so as to improve the yield, quality and resistance of the tomato.