抗除草剂简化栽培型谷子品种冀谷25的选育及配套栽培技术研究

Breeding of Foxtail Millet Cultivar Jigu 25 Resistant to Herbicide,Suitable for Simplified Cultivation and Corresponding Cultivation Techniques

运用多系品种的概念,结合从国外引进的谷子近缘野生种青狗尾草的抗除草剂基因,育成了适宜简化栽培的多系谷子新品种"冀谷25"。该品种由抗拿捕净的新品种"528-4"及不抗除草剂的同型姊妹系"528-5"组成。2004～2005年国家谷子品种区域试验平均单产为5 244.3 kg/hm2,较对照增产9.62%,2006年3月通过全国谷子品种鉴定委员会鉴定。该品种抗倒伏、抗旱且抗多种病害。通过研究姊妹系的适宜混配比例、播种量、除草剂种类、除草剂适宜喷施时期及剂量等,提出了与其配套的简化栽培技术,实现了同时化学间苗和化学除草,喷药后7 d左右自动达到大田生产所需的留苗密度,出苗25 d内对杂草防效达90%以上,全生育期基本不需要人工间苗和人工除草。本项研究的相关内容"简化栽培谷子品种选育及配套栽培方法",已获得了国家专利(专利号:ZL200410058088.9)。

Jigu 25,a multi-line foxtail millet cultivar which was suitable for simplified cultivation,was developed by applying the concept of multi-line cultivars and transferring the herbicide resistant gene from its wild relative species green foxtail introduced from abroad.It was composed of sethoxydim resistant variety 528-4 and its sib line 528-5 without herbicide resistance.The average yield was 5 244.3 kg/hm2 in the national regional test from 2004 to 2005,which increased by 9.62%.It was approved by the National Millet Cultivar Examination and Approval Committee in 2006.It had the characteristics of lodging resistance,drought resistance and disease resistance.The corresponding simplified cultivation technique were put forward by studying the appropriate mix ratio of sib-lines,seeding rate,herbicides and their proper spraying stage and dozen.Applying the techniques,the chemical thinning and weeding could be realized.The optimum density for the field production could be obtained around 7 days after spraying herbicides.25 days after seedling emergence,the efficiency on weeds control could be above 90%.Therefore,it was not basically necessary for artificial thinning and weeding in the whole growth period.The relevant contents in this study had been obtained the national patent（ZL 200410058088.9）.