高产多抗大穗型玉米新品种黔单18号的选育及配套技术

Breeding of Qiandan 18, a New Maize Variety with High Yield, Multi-esistance and Big Ear and its Cultivated Technique

黔单 1 8号系结合贵州玉米育种和生产实际 ,用适宜贵州的重要种质Suwan选系与优良自交系黄C组配而成。 2 0 0 2～ 2 0 0 3年参加贵州省玉米区试 ,平均产量达 5 41 .5kg/ 6 6 7m2 ,较对照增产 1 0 .3%。 2 0 0 3年生产试验平均产量达 5 5 7.8kg/ 6 6 7m2 ,比对照增产 1 3.4%。 2 0 0 4年 4月通过贵州省农作物品种审定委员会审定并定名为黔单 1 8号。该品种在贵州的平均生育期为1 2 2d ,株高 2 2 6cm ,穗长 2 0 .1cm ;中抗大、小斑病及纹枯病 ,抗黑粉病、青枯病 ,较抗倒伏。适宜种植密度为 2 80 0～ 330 0株 / 6 6 7m2 。可在贵州遵义、贵阳、铜仁、黔南和黔东南等地 (州、市 )的中。

Qiandan 18 is a hybrid of single cross QB44(a selected line from Suwan)×Huang C, had been released by Guizhou (Committee) of Crops Variety Examination in April, 2003.The average yield in Guizhou maize regional test during 2002～2003 was up to 8123kg/ha,10.3% higher than CK and the average yield in maize production test in 2003 was 8367kg/ha, 13.4% higher than CK. This variety revealed 122d of average growth period in Guizhou, 226cm of plant height, (20.1cm) of ear length, middle (resistance) to leaf blight, leaf spot and sheath blight, resistant to bacterial wilt and head smut and lodging. It should be planted at 42～49.5 thousand plants/ha of plant density in land with top, or middle soil fertility in Zunyi, Guiyang, Tongren, Qiannan, Qiandongnan and so on prefectures of Guizhou.