摘要
为评价控制双亲混合选择对1份非洲玉米种质合成基础群体AC0主要性状适应性改良效果,利用联合方差分析和变异系数分析群体间性状变异程度。结果表明,改良群体AC1和AC2的株高分别比AC0提高了8.60%和11.60%,差异达到极显著水平;穗位分别比AC0提高了11.34%和16.18%,差异达到极显著水平;改良群体AC1和AC2的穗长与AC0相比分别降低2.60%和提高1.57%,AC1与AC2间达到极显著水平;与AC0相比,AC1和AC2穗行数分别提高了2.44%和1.12%,均未达到显著水平;与AC0相比,AC1和AC2的秃尖长分别提高了0.75%和13.12%,均未达到显著水平。由以上可知,虽然控制双亲混合选择对热带种质产量性状早期改良进展较小,但随着改良的进行,群体多数性状的表型变异系数有所下降,但也有部分性状变异系数的变化幅度较小或有所增大,但控制双亲混合选择较好地保持了群体的遗传多样性。
In order to evaluate the effect of controlled parental mixed selection on the adaptive improvement of main characters of AC0, an African maize germplasm synthesis base population. The combined analysis of variance and coefficient of variation were used to analyze the variation of characters among populations. The results showed that compared with the basic population AC0, the plant height of the improved populations AC1 and AC2 increased by 8.60% and 11.60%, respectively, reaching a extremely significant level. The ear height increased by 11.34% and 16.18% respectively, reaching a extremely significant level. Compared to AC0, the ear length of improved populations AC1 and AC2 decreased by 2.60% and increased by 1.57%, and there was extremely significant difference between AC1 and AC2;the number of rows per ear increased by 2.44% and 1.12%, respectively, which did not reach significant level. The barren tip length of AC1 and AC2 increased by 0.75% and 13.12%, respectively, which did not reach significant level. In condusion, the early improvement of tropical germplasm yield traits by controlling parental mixed selection was less advanced. With the progress of improvement, the phenotypic variation coefficients of most traits in the populations decreased, but the variation coefficients of some traits were smaller or increased. However, controlled parental mixed selection could maintain the genetic diversity of the population better.
作者
张艳茹
杨子和
杨荣
韩建
焦金龙
赵丽
吴元奇
Zhang Yanru;Yang Zihe;Yang Rong;Han Jian;Jiao Jinlong;Zhao Li;Wu Yuanqi(Maize Research Institute,Sichuan Agricultural University,Chengdu 611130,Sichuan,China;Ya'an Agricultural Science Research Institute,Ya'an 625000,Sichuan,China;Agriculture and Rural Bureau of Peng'an County,Nanchong 637800,Sichuan,China)
出处
《作物杂志》
北大核心
2021年第5期14-19,共6页
Crops
基金
国家重点研发计划(2016YFD0300309)
四川省教育厅项目(17EA0317)。
关键词
玉米
热带种质
控制双亲混合选择
适应性改良
性状
Maize
Tropical germplasm
Controlled parental mixed selection
Adaptive improvement
Traits
