Xue Y, Jiang L, Su N, Wang J K, Deng P, Ma J F, Zhai H Q, Wan J M
National Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, China.
Planta. 2007 Dec;227(1):255-62. doi: 10.1007/s00425-007-0613-0. Epub 2007 Aug 25.
Aluminium (Al) toxicity is a primary cause of low rice productivity in acid soils. We have mapped a number of quantitative-trait loci (QTL) controlling Al tolerance in a recombinant inbred line population derived from a cross between the tolerant japonica cultivar Asominori and the sensitive indica cultivar IR24. Tolerance was assessed on the basis of relative root elongation. QTL were detected on chromosomes 1, 9, and 11, with the percentages of phenotypic variance explained ranging from 13.5 to 17.7%. Alleles from Asominori at all three QTL were associated with increased Al tolerance. qRRE-9 is expressed both in the genetic background of IR24 and in an Asominori/IR24-mixed background. qRRE-9 was reduced to the single recessive Mendelian factor Alt-9. High-resolution genetic and physical maps were constructed for Alt-9 in a BC(3)F(2) population of 1,043 individuals. Alt-9 maps between RM24702 and ID47-2 on chromosome 9, and co-segregates with RM5765.
铝（Al）毒性是酸性土壤中水稻产量低下的主要原因。我们在一个重组自交系群体中定位了多个控制铝耐受性的数量性状位点（QTL），该群体来源于耐铝粳稻品种“阿苏之光”（Asominori）与铝敏感籼稻品种“IR24”的杂交。基于相对根伸长来评估耐受性。在第1、9和11号染色体上检测到QTL，其解释的表型变异百分比在13.5%至17.7%之间。在所有三个QTL上，来自“阿苏之光”的等位基因都与铝耐受性增加有关。qRRE - 9在“IR24”的遗传背景以及“阿苏之光”/“IR24”混合背景中均有表达。qRRE - 9被简化为单隐性孟德尔因子Alt - 9。在一个由1043个个体组成的BC(3)F(2)群体中，为Alt - 9构建了高分辨率遗传图谱和物理图谱。Alt - 9定位于第9号染色体上的RM24702和ID47 - 2之间，并与RM5765共分离。
