qRgls1.06, a major QTL conferring resistance to gray leaf spot disease in maize

Gray leaf spot(GLS)caused by Cercospora zeae-maydis and C.zeina is an extremely devastating leaf disease that limits maize production annually.The use of GLS-resistant maize hybrids is the most cost-effective approach for reducing losses.Resistance to GLS is quantitatively inherited in maize(Zea mays L.)and further sources of resistance remain to be analyzed.Here,we detected qRgls1.06,a major quantitative trait locus for GLS resistance in bin 1.06 that explained approximately 55%of the phenotype variance.Fine mapping over 2 consecutive years localized qRgls1.06 to a 2.38-Mb region.Homozygous qRgls1.06^(WGR/WGR) plants in DZ01 background displayed higher GLS resistance and 100-grain weight than DZ01 plants.The GLS responses of several susceptible elite inbred lines were improved by the introduction of qRgls1.06 by marker-assisted backcrossing.Our findings extend the understanding of the genetic basis of resistance to GLS and provide a set of resistant germplasm for genetic improvement of resistance to GLS in maize.

玉米新品种腾龙2607的选育

玉米新品种腾龙2607是以DH8G108为母本、MK1为父本进行杂交组配育成的单交种,于2020-2021年参加湖北省玉米山区组绿色通道品种区域试验和生产试验,2022年通过审定,适宜鄂西山区及西南相似生态区种植。该品种株型清秀,综合抗性好,适合大豆玉米带状复合模式种植。对腾龙2607的选育思路、选育过程、特征特性及栽培制种技术要点进行介绍,以促进此类品种的推广应用。

长江经济带农业全要素生产率变动实证研究

利用2003—2015年长江经济带分省面板数据和DEA-Malmquist指数对农业全要素生产率进行分解与分析,通过对整个长江经济带、长江经济带各省(市)、长江经济带各省(市)所属地区的农业全要素生产率进行分解与分析。结果表明,(1)长江经济带农业全要素生产率保持增长,各构成要素贡献率不同;(2)长江经济带农业全要素生产率省际差异和地区差异明显;(3)长江经济带农业全要素分解过程中,各要素之间存在滞后性。技术进步与资源配置效率提高并举;改善农业生产环境,发展适度规模经营;省市、地区共同协作,资源互补,优势互换。