Major gene control of tolerance of bread wheat (Triticum aestivum L.) to high concentrations of soil boron
Major gene control of tolerance of bread wheat (Triticum aestivum L.) to high concentrations of soil boron
复制标题
面包小麦（Triticum aestivum L.）对高浓度土壤硼耐受性的主基因控制
作者：
J. Paull;A. Rathjen;B. Cartwright
研究了5个小麦品种对土壤高硼胁迫的耐性的遗传控制。每种基因型代表了对高水平硼的五种反应之一，范围从非常敏感到耐受。对硼的耐性表现为部分显性性状，尽管F1对亲本的反应因施硼水平的不同而不同。F_1代在低B处理下与耐性较强的亲本反应相似，在高B处理下与亲本反应居中。杂交组合(WI*MMC)×肯尼亚Farmer、Warigal×(WI*MMC)和Halberd×Warigal的F2和F3世代的比例符合单基因分离。Bo1、Bo2和Bo3这3个基因，以及G61450和Halberd两个耐性基因之间的超亲分离，表明了第四个控制耐硼的基因座。
SummaryThe genetic control of tolerance of wheat to high concentrations of soil boron was studied for five genotypes. Each genotype represented one of five categories of response to high levels of boron, ranging from very sensitive to tolerant. Tolerance to boron was expressed as a partially dominant character, although the response of an F1 hybrid, relative to the parents, varied with the level of boron applied. The F1 hybrids responded similarly to the more tolerant parent at low B treatments and intermediate to the parents at higher treatments. Ratios consistent with monogenic segregation were observed for the F2 and F3 generations for the combinations (WI*MMC) × Kenya Farmer, Warigal × (WI*MMC) and Halberd × Warigal. The three genes, Bo1, Bo2 and Bo3, while transgressive segregation between two tolerant genotypes, G61450 and Halberd, suggested a fourth locus controlling tolerance to boron.