论文部分内容阅读
按Griffing双列杂交(Ⅳ)方法,分析了8个玉米自交系的穗长、秃尖长、穗粗、穗行数、行粒数、单穗重、单株产量和百粒重等与抗旱性相关的性状在雨养地和水分胁迫下的GCA、SCA及遗传变量。结果表明:穗长、单穗重、穗行数、行粒数和单穗产量以加性基因效应为主,穗粗、百粒重以非加性基因效应为主。6221、6620、5003及330能产生抗旱高产且产量性状良好的杂交组合,是有利用价值的亲本。6221×8902、6221×5003、6221×6270、6620×8902、6620×6270、6620×330、金599×8902和Mo17×330等组合可在干旱、半干旱地区示范种植。产量性状在不同水分环境下的遗传特点存在一致性,对其遗传改进和产量潜力的选择宜在无胁迫条件下进行。
According to the method of Griffing double row hybridization (IV), the spike length, bald length, ear diameter, ear number per row, grain number per line, single ear weight, single plant yield, GCA, SCA and genetic variables of drought-resistant traits under rain and water stress. The results showed that there were additive gene effects in panicle length, panicle weight per panicle, panicles per panicle, panicles per panicle and single panicle yield, while panicle weight and panicle weight were dominated by non-additive gene effect. 6221, 6620, 5003 and 330 can produce hybrids with good drought-resistance and good yield traits, which are valuable parents. 6221 × 8902,6221 × 5003,6221 × 6270,6620 × 8902,6620 × 6270,6620 × 330, gold 599 × 8902 and Mo17 × 330 can be planted in arid and semi-arid areas. The genetic traits of yield traits in different water environments are consistent. The selection of their genetic improvement and yield potential should be conducted under stress-free conditions.