高产、优质、多抗玉米新品种豫玉31的选育与示范推广

Breeding of High Yield、high Quality and Multi-Resistant New Corn Variety Yuyu No.31 and Its Demonstration and Popularization

豫玉 31(漯单 97_1)是河南省漯河农科所用自选系漯 12作母本 ,外引系丹 340作父本育成的竖叶大穗中早熟玉米单交种。该品种夏播生育期 96d。 1997～ 1998年河南省夏玉米区域试验平均单产 76 95 0kg/hm2 ,比对照种豫玉 12增产 13 5 %。两年 2 0点次试验证明 ,该品种表现高产、稳产、优质、多抗、适应性广、增产潜力大 ,适宜在黄淮海夏玉米区套种或直播种植。种植密度 45 0 0 0～ 6 0 0 0 0株 /hm2 。制种时父母本同期播种或父本浸种后与母本同期播种 ,行比 1:5～ 6。

Corn single_cross variety yuyu No 31(Luodan97_1)was bred by inbred_line luo12(female)and Dan 340(male).The growing period of Yuyu NO.31 is 96 days in summer seeding.An average yield of yuyu No.31 is 7 695.0 kg/hm 2 ,13.5%higher than yuyu No.12(CK)in the summer maize variety regional test of Henan province in 1997～1998 The test result showed:Yuyu NO.31 has the characteristics of high and stable yield,good quality,multi-resistance,wide adaptation and great potentialities.Yuyu NO.31 is suited for summer sowing or intercropping in Huang-Huai Sea area,at the same time,its density is 45 000～60 000 seedlings/hm 2,When seed propagating,Yuyu No 31's female and male were sowed mean while and their line proportion is 5～6:1