不同密度下黄早4改良系单株产量的遗传分析  

Genetic Analysis of Per Plant Yield of Huangzao 4 at Different Density

作　　者：王克伟 杨巍[1] 慈佳宾[1] 任雪娇[1] 李忠南[1] 杨伟光[1] 

机构地区：[1]吉林农业大学农学院,长春130118

出　　处：《分子植物育种》2017年第11期4746-4751,共6页Molecular Plant Breeding

基　　金：国家重点研发计划(2016YFD0101202-3);吉林省科技发展计划项目(20140306024NY);吉林省科技发展计划项目(20140306039NY;20160204001NY)共同资助

摘　　要：本研究利用6个Reid、No-Reid群的优良自交系作为母本,5个DH系为父本,采用增广NCII设计组配30个杂交组合,设置三种密度梯度,对杂交组合单株产量的杂种优势、配合力及遗传特点进行了研究。结果表明,在6.0×104株/hm2、7.5×104株/hm2、9.0×104株/hm2三种密度条件下30个杂交组合均存在杂种优势,低密度时F1单株产量杂种优势较大,随着密度的增加F1杂种优势值降低。三个密度下的最高组合分别为郑58×3DH20(127.39)、郑58×3DH26(117.11)、J1255×3DH26(86.17)。在三种密度下对一般配合力进行分析,结果表明DH系3DH26和3DH6一般配合力均较高,说明其配合力及稳产性较好,3DH26在高密度下的一般配合力较高,说明其耐密植。特殊配合力分析表明,以3DH26作父本与J1255和郑58的杂交组合在高密度下有较高的SCA效应值,产量高,适宜密植。遗传参数分析表明,三种密度下,单株产量广义遗传力50%以上,非加性效应较大。通过上述结果,以期鉴定黄改DH系的应用潜力,为黄改系遗传改良及玉米DH育种提供参考。In this research we used six superior inbred lines of Reid and No-Reid populations as female parents and male parents were five DH lines. And the heteroses, combining abilities and genetic characteristics of hybrid cross combinations per plant yield were studied by using the enhanced NCII design matching 30 hybrid combinations with three density gradients. The results showed that there were heteroses for 30 cross combinations under the density of 6.0 ×104 plants/hm2, 7.5 ×104 plants/hm2 and 9.0 ×104 plants/hm2, the heterosis of F1 per plant yield under low density was relatively large, and F1 heterosis decreased with the increasing of the density. Under the three densities the highest combinations were Zheng 58 ×3 DH20（127.39）, Zheng 58×3 DH26（117.11） and J1255×3 DH26（86.17）, respectively. The results of general combining ability analysis showed that the general combining ability of both 3 DH26 and 3 DH6 in DH lines under the three densities were relatively high, which indicated they had relatively good combining ability and yield stability, and the general combining ability of 3 DH26 was higher under high density, that indicated its resistance to dense planting. The analysis of special combining ability showed that the cross combination of 3 DH26 as male parent and J1255 or Zheng 58 under high density had a relatively high SCA effect value with high yield, which suitable for close planting. Genetic parameter analysis showed that the broad-sense heritability of per plant yield under the three densities was more than 50%and non-additive effect was relatively large, The above results identified the potential application of the DH lines,that provided a reference for the inheritan improvement of yellow system and maize DH breeding.

关 键 词：玉米 密度 杂种优势 配合力 遗传 

分 类 号：S513[农业科学—作物学]