以骨干自交系ZNC442和SCML0849为亲本构建F_2:3家系，分别在雅安、宜宾、南充、绵阳等试点播种，针对多个环境的青贮玉米干物质产量和青贮品质进行评价和分析。结果表明，随着播期的推迟，雅安试点青贮玉米生育期缩短且干物质产量减少。绵阳、南充和雅安早春播种试点的酸性洗涤纤维含量和中性洗涤纤维含量较低，粗蛋白含量和淀粉含量较高，青贮品质较好，干物质产量较高；宜宾试点的酸性洗涤纤维含量和中性洗涤纤维含量较高，淀粉含量和粗脂肪含量较低，青贮品质较差。5个环境下，F_2:3家系的酸性洗涤纤维含量和中性洗涤纤维含量均达到极显著正相关水平，相关系数在0.56～0.88；大多数青贮品质性状在雅安晚春播种试点与宜宾试点间的相关性较高。

To evaluate and analyze the dry matter yield and silage quality of silage maize in multiple-environment trials, the inbred lines ZNC442 and SCML0849 were used as parents to construct F_2:3 families, which were sown in Ya'an, Yibin, Nanchong and Mianyang, respectively. The results showed that with the delay of sowing date, the growth period of silage maize in Ya'an was shortened and the dry matter yield decreased. Early spring sowing in Ya'an, Mianyang, and Nanchong resulted in lower acid detergent fiber(ADF) and neutral detergent fiber(NDF) content, while crude protein and starch contents were higher, leading to better the silage quality and higher dry matter yield. The acid detergent fiber and neutral detergent fiber content in Yibin were relatively high, while the starch content and crude fat content were low, and the silage quality was poor. The acid detergent fiber and neutral detergent fiber content of the F_2:3 family in 5 environments showed a highly significant positive correlation level, with correlation coefficient between 0.56 and 0.88. Most silage quality traits showed high correlations between late spring sowing pilot in Ya'an and Yibin.

S513.01

四川省“十四五”农作物育种攻关项目(2021YFY0017)