摘要
以一个营养生长期长的有限型大豆品系通交83—932与营养生长期短的无限型品系公交8324—19和亚有限型品种吉林27号杂交获得开花期和生育期广泛分离的F_2群体,在虫害大发生的条件下靠自然害虫群体在田间鉴定了亲本,F_1和F_2代的抗虫性,研究了开花期和成熟期对大豆抗虫性表现的影响。结果表明,三个组合F_2代单株的虫食率与开花期和成熟期均呈极显著负相关。开花期和虫食率间的关系较复杂,受多种因素的影响,可以用多项式曲线拟合。对一组正反交组合的研究表明,用营养生长期长的材料做母本时,F_2代低虫食率单株的频率显著高于其反交组合。在抗虫筛选中,按成熟期严格分组,在组内进行抗虫性选择有助于减少生育期的干拢,提高准确性。
A determinate soybean line (Tong 83-932) with late flowering character was crossed with a indeterminate breeding line (Gong 8324-19) and a semi-determinate cultivar (jilin No. 27) to obtain widely segregating F2 populations in flowering and mature dates. The P1, P2, F1 and F2 populations were evaluated in the field infested with soybean pod borer. The relationships of soybean pod borer resistance with days to flowering and maturity were investigated. The results showed that the percentage of damaged seeds by soybean pod borer of F2 plants was negatively correlated with days to flowering and maturity in all the 3 F2 populations studied. The relationships between percentage of damaged seeds and days to flowering was rather complicate but could be well expressed with polynomial curves. The results from investigating a pair of reciprocal crosses indicated that if the line with late flowering character was used as the female parent, the frequencies of F2 plants with lower percentage of damaged seeds were much larger than that in the reciprocal cross. In a breeding program, it is advisable to evaluate insect resistance by grouping the testing materials into maturity classes with minimum maturity differences. The procedure could greatly lower the interferences from maturity and flowering date, and enhance the accuracy of resistant screening.
出处
《大豆科学》
CAS
CSCD
北大核心
1993年第2期113-122,共10页
Soybean Science
关键词
大豆
食心虫
遗传
育种
Soybean pod borer
Flowering date
Mature date percentage of damaged seeds
