摘要
为筛选单株粒重及氮肥农学效率配合力较高的玉米自交系,以15个自交系为材料,按照NCⅡ交配设计组配成56个杂交组合,在低氮胁迫下,估算了自交系单株粒重和氮肥农学效率的一般配合力与杂交组合的特殊配合力。结果表明:单株粒重的一般配合力表现为正向效应的自交系是WZ14212、WZ1718-2、1734A10、Z7A-21、1734B325、1735A2和WZ853,效应值分别为3.97、2.86、2.55、2.13、1.14、0.75和0.74,特殊配合力效应值>7的杂交组合有8个,效应值为7.46~10.64。氮肥农学效率的一般配合力表现为正向效应的自交系是WZ14212、1734A10、WZ853、195-73、WZ1718-2和1735A2,效应值分别为9.96、5.06、4.63、2.45、1.78和1.55,特殊配合力效应值>10的杂交组合有11个,效应值为10.95~24.86。相关分析显示,在低氮胁迫下,杂交组合单株粒重与父本自交系单株粒重的一般配合力呈显著正相关,r为0.2921*;杂交组合氮肥农学效率与其母、父本自交系氮肥农学效率的一般配合力呈极显著和显著正相关,r分别为0.3848**和0.3289*;杂交组合单株粒重和氮肥农学效率与其配合力总效应呈极显著正相关,r分别为0.9669**和0.9455**。研究结果预示WZ14212、WZ1718-2、Z7A-21、1734A10、1734B325、1735A2和WZ853是玉米杂交育种中组配单株粒重和氮肥农学效率较高的杂交组合可以选用的自交系。
To screen maize inbred lines with high combining ability for single plant grain weight and nitrogen fertilizer agronomic efficiency,using 15 inbred lines as materials,56 hybrid combinations were constructed according to the NCⅡmating design.Under low nitrogen stress,the general combining ability of inbred lines for single plant grain weight and nitrogen fertilizer agronomic efficiency were estimated,as well as the specific combining ability of hybrid combinations.The results indicated that the inbred lines with positive general combining ability effects for single plant grain weight were WZ14212,WZ1718-2,1734A10,Z7A-21,1734B325,1735A2 and WZ853,with effect values of 3.97,2.86,2.55,2.13,1.14,0.75 and 0.74,respectively.There were 8 hybrid combinations with the special combining ability effect values greater than 7,ranging from 7.46 to 10.64.The inbred lines showed positive general combining ability for nitrogen fertilizer agronomic efficiency were WZ14212,1734A10,WZ853,195-73,WZ1718-2 and 1735A2,with effect values of 9.96,5.06,4.63,2.45,1.78 and 1.55,respectively.There were 11 hybrid combinations with the special combining ability effect values greater than 10,ranging from 10.95 to 24.86.Correlation analysis showed that under low nitrogen stress,there was a significant positive correlation between the single plant grain weight of hybrid combinations and the general combining ability of the single plant grain weight with male parent inbred line,r were 0.2921*;there were highly significant and significant positive correlations between nitrogen fertilizer agronomic efficiency of hybrid combinations and the general combining ability of nitrogen fertilizer agronomic efficiency with its diploid inbred lines,r were 0.3848**and 0.3289*,respectively;and there were highly significant positive correlations between both the single plant grain weight and agronomic efficiency of nitrogen fertilizer in hybrid combinations with their total combining ability effects,r were 0.9669**and 0.9455**,respectively.The results suggested that WZ14212,WZ1718-2,Z7A-21,1734A10,1734B325,1735A2 and WZ853 could be inbred lines developing hybrid combinations with high single plant grain weight and nitrogen fertilizer agronomic efficiency in maize breeding programs.
作者
向振凡
霍川
冯云超
羊炼
黄美瑕
晏庆九
霍仕平
XIANG Zhenfan;HUO Chuan;FENG Yunchao;YANG Lian;HUANG Meixia;YAN Qingjiu;HUO Shiping(Chongqing Three Gorges Academy of Agricultural Science,Chongqing 404155;Chongqing Three Gorges University,Chongqing 404100;Modern Agricultural Service Center of Ziyang,Sichuan Province,Ziyang,Sichuan 641400)
出处
《中国农学通报》
2025年第20期1-9,共9页
Chinese Agricultural Science Bulletin
基金
重庆市技术创新与应用发展专项重大项目“宜机优质饲用玉米种质培育与应用”(CSTB2022TIAD-KPX0007)
重点项目“肥高效利用和镉低积累玉米种质创制与应用”(CSTB2022TIAD-KPX0006)
重庆市科企联合体重大项目“优质玉米资源收集利用与基因型试验示范”(2021-2025)。
关键词
玉米自交系
低氮胁迫
单株粒重
氮肥农学效率
配合力
maize inbred lines
low nitrogen stress
grain weight per plant
nitrogen fertilizer agronomic efficiency
combining ability
