Genetic Identification of Quantitative Trait Loci for Contents of Mineral Nutrients in Rice Grain
Genetic Identification of Quantitative Trait Loci for Contents of Mineral Nutrients in Rice Grain
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水稻籽粒矿质营养素含量数量性状位点的遗传鉴定
DOI：
10.1111/j.1744-7909.2008.00730.x
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发表时间：
2009-01-01
影响因子：
11.4
通讯作者：
Sun, Chuanqing
中科院分区：
文献类型：
--
作者：
Garcia-Oliveira, Ana Luisa;Tan, Lubin;Sun, Chuanqing
采用电感耦合氩等离子体（ICAP）光谱法测定了特青与野生稻杂交的85个渗入系的铁、锌、锰、铜、钙、镁、磷和钾的含量。除Fe与Cu外，其余矿质元素均呈显著正相关或独立。单点分析共检测到31个推测的8种矿物元素数量性状位点（qtl）。野生稻（O. rufipogon）贡献了大部分有利等位基因（26个），其中1、9和12号染色体上有14个有利等位基因（45%）。在8号染色体上的简单序列重复标记RM152附近检测到锌含量的QTL在表型变异中所占比例最大（11% ~ 19%）。在该定位群体中观察到的部分矿质元素qtl的共定位表明，这些性状之间存在分子水平的关系，可能有助于通过标记辅助选择在水稻籽粒中同时改良这些性状。
In present study, Fe, Zn, Mn, Cu, Ca, Mg, P and K contents of 85 introgression lines (ILs) derived from a cross between an elite indica cultivar Teqing and the wild rice (Oryza rufipogon) were measured by inductively coupled argon plasma (ICAP) spectrometry. Substantial variation was observed for all traits and most of the mineral elements were significantly positive correlated or independent except for Fe with Cu. A total of 31 putative quantitative trait loci (QTLs) were detected for these eight mineral elements by single point analysis. Wild rice (O. rufipogon) contributed favorable alleles for most of the QTLs (26 QTLs), and chromosomes 1, 9 and 12 exhibited 14 QTLs (45%) for these traits. One major effect of QTL for zinc content accounted for the largest proportion of phenotypic variation (11%-19%) was detected near the simple sequence repeats marker RM152 on chromosome 8. The co-locations of QTLs for some mineral elements observed in this mapping population suggested the relationship was at a molecular level among these traits and could be helpful for simultaneous improvement of these traits in rice grain by marker assisted selection.