大豆杂交后代中叶片茸毛着生状态对豆卷叶螟抗性的选择效应

wo breeding line populations with diverse leaf pubescence status were established from a double cross between Tongshanbopihuangdoujia and Aiganhuang (TA), and a three-way cross of (Tongshanbopihuangdoujia × Aiganhuang) × N8855 (NTA), respectively, and selection effects of leaf blade pubescence status on resistance to bean pyralid (Lamprosema indicata Fabricius) were evaluated in these populations. Joint analysis of variance of rolled leaves percentage showed the existence of significant difference among years, observation dates, lines and blocks in a two-year test. There was also significant interaction between lines and years as well as lines and observation dates. Correlation analysis showed that the resistance to bean pyralid was stable in different years and observation dates. There existed significant difference of pubescence angle on leaf blade in breeding lines of TA and NTA populations, and very significant correlation was found between pubescence angle on leaf blade and resistance to bean pyralid. Three types of leaf pubescence status, i.e. prostrate, semi-prostrate and skewed, had different selection effects on rolled leaves percentage by bean pyralid, and the average selection values were -31.82%, 50.00% and 81.82% in TA population, and -37.09%, 14.87% and 103.21% in NTA population, respectively. Significant selection effects of leaf blade pubescence status on resistance to bean pyralid were found in R1-R6 stages. It indicated that the pubescence status on leaf blade can be used as an indirect indicator for the resistance to bean pyralid in marker-assisted selection breeding.