适宜西南山区的高产优质多抗玉米杂交种贵单8号选育研究

Breeding Study of High Yield,Good Quality and High Resistance Corn Hybrid Vareity Guidan No.8

贵单8号是贵州大学农学院选育的适宜西南山区种植的高产、优质、多抗玉米杂交种。在2004～2005年贵州省玉米杂交种西部组区试和生产试验中,均居参试品种第1位,两年区试平均产量为9 867.7 kg/hm2,16个点次全部增产,其中8个点次是第1位,两年分别比对照增产23.27%和23.42%;生产试验平均产量7 864.5 kg/hm2,平均较对照增产16.92%,5个试点全部增产,其中3个试点是第1位。该品种种子顶土能力强,幼苗生长健壮,抗旱耐瘠,综合抗性好,高产稳产,适应性广,品质优良。2006年5月已通过贵州省品种审定委员会审定。在贵州中西部玉米主产区及我国西南山区具有广阔的推广应用前景。它的育成和应用将推动西南山区玉米大面积产量水平的提高。

Guidan No.8, bred by agricultural college of guizhou university, is a hybrid corn variety with characteristics of high yield, good quality and high resistance to diseases and adversity environment. In 2004 - 2005 regional test and production experiment of Guizhou western group of hybrid varieties, the performance of Guidan No.8 ranked first. The average yield of Guidan No.8 in the two-year regional test reached 9 867.7 kg/ha. And at all 16 test sites it yielded over the control, and ranked first at 8 sites. Compared with the control, the yields of Guidan No.8 increased by 23.27% and 23.42% respectively in 2004 and 2005. In the production experiment its average yield was 7 864.5 kg/ha, increasing 16.92% by average against the control. It yielded higher than the control at all 5-experimental sites, and performed best at the 3 sites. Guidan No.8 showed excellent performance in many aspects： strong seed emerging vigor from soil, strong and well-growing seedlings, high resistance to adversity environment including drought and barren soil, high adaptability, high and stable yield, and good quality. In May 2006 Guidan No.8 passed examination and approval to extension of agricultural variety approval commission of Guizhou province. The new variety of Guidan No.8 is a great achievement of mountainous corn breeding. It has great potential to be extended to central and western Guizhou province and as well as southwest mountainous areas of China, will greatly contribute to yield increase of corn in a large scale in those region.