耐热耐贮番茄品种改良

利用Lima品种作为父本与冬季栽培的番茄品种 (413、4 5 2、4 99、5 14和 5 6 0 )进行杂交 ,改良冬季栽培番茄品种的产量和品质 ,通过对杂交后代自交纯化 ,获得 4 5 2×Lima自交系产量最高 ,为 4 4 .2 9t·hm-2 ,比对照Lima和VF134 1 2增产 33.0 %和 31.6 % ,大部分自交系的果实硬度与对照相同 ;将耐热品种 6 6 7(CL5 915 2 0 6D4 2 5 0 )和 6 6 9(CL5 915 2 2 3D4 2 1 0 )与耐热的冬季栽培番茄品种进行杂交 ,然后自交并对其自交系的耐热性和果实品质进行选择 ,其中 5 0 2× 6 6 9、5 74× 6 6 7的自交系产量分别为 6 9.16和 6 6 .16t·hm-2 ,比对照Lima和VF134 1 2增产 18.2 %和 38.7% ,果实硬度与对照相同 ;将耐热品种L2 2和含突变基因 (nor1、nor2 )材料进行杂交和回交 ,对L2 2的货架期进行改良 ,其中BC2 和BC3 产量比L2 2高 4 %～ 9% ,果实在室温下保存 30d ,其完好率为 18%～...

Improvement of Heat Tolerant and Long-shelf Life Tomato

Winter tomato varieties were improved by using variety Lima as a male parent to cross to some recurrent winter tomato varieties 413,452,499,514 and 560. Progenies of the hybrids were selected by pedigree method. The inbred lines of the crosses showed 12 %-32 % higher yield than control varieties VF134-1-2 and Lima.The inbred line from crossed 452×351 showed the highest yield,44.29 t·hm -2 and while varieties Lima and VF134-1-2 showed 33.29 and 33.66 t·hm -2,respectively. Most of the inbred lines sho...