玉米自交系合选19的选育与利用

Breeding and Utilization of Maize Inbred Line Hexuan 19

针对黑龙江省第二积温带玉米单产水平低,抗病性差,适应性不强,品种单一的现状,黑龙江省农业科学院佳木斯分院利用地方系冬96×丹340(晚熟、抗病、广适、高配合力自交系)选育出优良骨干玉米自交系合选19。利用合选19作为亲本成功选育出高产稳产抗病适应性广的玉米新杂交种合玉23,3a累计推广13.56万hm2。增产商品玉米22.12万t,增加经济效益4.42亿元。

The maize varieties in the second accumulated temperature zone of Heilongjiang province had poor re- sistance, poor adaptability and low yield, taking local native line Dong 96 （early-maturing,local germplasm） and Dan 340 （late-maturing, disease resistance, wide adaptability, high combining ability） for selecting inbred line. Using this method, Hexuanl9 （middle-maturing, disease resistance, wide adaptability, high combining ability） was selected which been used for variety Heyu23 （planting area was 134. 9 thousand hectares, increase yield 221.2 thousand tones,increase economic efficiency 442 million yuan in 2012-2014）.