大豆超高产品种类型的设计与选育

报道了大豆超高产育种方面的进展。根据超高产育种目标 ,选育产量潜力达到 5 0 0 0kg/hm2 的品种 ,设计并选育了几个品种类型 :①群体最大叶面积指数为 5 5 ;②小叶、多分枝、紧凑型品种 ;③亚有限适宜密植型品种。试验表明 :这些品种类型都比较容易获得超过 4 0 0 0kg/hm2 的产量水平 ,具有 5 0 0 0kg/hm2 的产量潜力。系谱分析表明 ,这几个超高产品种中 ,吉林省本地血缘较少 ,仅为 1/ 16～ 5 / 16 ,相邻省的血缘各占约 1/ 4 ,其余为地理远缘

Design and Breeding of Super high Yielding Variety Types in Soybean

This paper reported new progress on supper-high-yielding breeding in soybean.The object of super-high-yielding breeding was to develop new variety that had 5 000 kg/hm 2 seed yield potential.Several variety types were designed and selected:① Maximum leaf area index of canopy was 5.5.②Leaflet,branchy geem,tight trye varieties.③Semi-determinate dense-planting type.Experiment showed that more than 4 000 kg/hm 2 seed yield was easily obtained using these varieties and the super-high-yielding varieties had 5 000 kg/hm 2 yield potential.Pedigree analysis shown that local germplasm from Jilin province was only 1/16 to 5/16,germplasm from Heilongjiang and Liaoning province respectively1/4.Proportion of local germplasm in the super-high-yielding varieties was less than that in high-yielding varieties.