优良玉米杂交种农大3138的选育与推广

农大3138的选育主要是针对生产用品种的缺点和弱点,通过亲本材料的科学选择,实现性状互补,加大亲本间的遗传差距;同时加大适应性、抗逆性和抗病性等的选择压。该品种在多年各类区域试验中表现优异,名列1,2位。先后通过北京市、山西省、河北省及国家品种审定。山西省近3年种植面积累计达40.7万hm2,居省内玉米品种占有面积的第1位(2年)和第2位(1年),总增产1.5亿kg。1997～2001年在国内9省市累计推广166.7万hm2,其中2001年种植面积达53.3万hm2。全国5年累计增产玉米12.5亿kg,增收12.5亿元。制种增收获利1.25亿元。

Selection and Extension of Maize Hybrid Nongda3138

Aimed at weakness of some cultivars,Nongda3138 was bred through selection of parent material for characters complementary,bigger hereditary difference,better adaptability and stronger stress/disease resistance.Technique of molecular marking identification and two seperate hybrid vigor populations of Zong31 and P138 provide new model for hybrid optimization.Nongda3138 has shown outstanding performance in various regional trails for years and has been among the best of the successful candidates.Nongda 3138 has been approved by Beijing,Shanxi,Hebei and the national variety appraisal.In recent 3 years it has got an accumulated acreage planted of 407 000hm2 in Shanxi and increased total output of 15 million kilogram.From 1997 to 2001,Nongda 3138 has been extended in other 9 provinces/cities for altogether 1.667 million hm2 and increased output of 1 250 million kilogram,income of 1 250 million Chinese Yuan and got a profit of 125 million Chinese Yuan for its seed propagation.