16个青贮玉米品种农艺性状与产量的通径分析  

Path Analysis on Agronomic Traits and Yield of 16 Silage Maize Hybrids

作　　者：雷志刚[1] 王业建[2] 梁晓玲[2] 赵海菊 闫秀香 阿布来提[2] 韩登旭[2] 杨杰[2] 李铭东[2] 郗浩江[2] 

机构地区：[1]新疆畜牧科学院草原研究所,新疆乌鲁木齐830000 [2]新疆农业科学院粮食作物研究所,新疆乌鲁木齐830091 [3]新疆九禾种子研究院,新疆昌吉831100

出　　处：《草食家畜》2016年第4期43-49,共7页Grass-Feeding Livestock

基　　金：国家玉米产业技术体系建设专项(CARS-02-68);新疆农业科学院优秀青年科技人才基金(xjnky-2012-13);新疆自治区攻关重大专项(201230116-2);自治区公益性科研院所基本科研业务经费资助项目(KY2015066)

摘　　要：为了明确农艺性状对青贮玉米产量所产生的直接和间接影响,客观评价农艺性状对产量的实际贡献。本研究选用16个青贮玉米品种,采用随机区组设计,利用DPS统计软件,对生物产量与农艺性状进行相关和通径分析。结果表明,青贮玉米生物产量与茎粗(r=0.6662**)、株数(r=0.5789**)和株高(r=0.5534**)呈极显著正相关。茎秆重(P=4.54283)对产量贡献最大,茎粗(P=4.0889)对产量的贡献次之,同时通过出苗-吐丝天数所起的间接效应均为正值。通过增加茎粗和茎秆重量,适当延长生育期,适度增加株高,有助于青贮玉米整体产量水平的提高。在青贮玉米高产育种中应对茎粗、株数、株高、茎秆重和生育期进行重点选择。To clarify the direct and indirect impact and to evaluate objectively contribution of agronomic traitsto yield, 16 silage maize hybrids were tested by randomized block design. Correlation and path coefficientbetween whole plant biomass yield and agronomic traits were analyzed by DPS statistical software. The resultshowed that the yield of silage maize hybrid was extremely significantly correlated with diameter of stalk （r =0.6662^）, number of plant（r =0.5789＂）, height of plant（r =0.5534^）and weight of stalk（r =0.5266）. Weight ofstalk（P=4.54283）and diameter of stalk（P=4.0889） contributed to yield comparatively larger and effected withdays of germination to silk positively. Therefore, selection of the traits of diameter of stalk, number of plant,height of plant, weight of stalk and days of germination to silk should be paid more attention to silage maizewith high yield breeding.

关 键 词：青贮玉米 产量 农艺性状 通径分析 

分 类 号：S816.53[农业科学—饲料科学]