定位与水稻（Oryza sativa）中砷积累相关的数量性状基因座。
Mapping quantitative trait loci associated with arsenic accumulation in rice (Oryza sativa).
作者信息
Zhang Jing, Zhu Yong-Guan, Zeng Da-Li, Cheng Wang-Da, Qian Qian, Duan Gui-Lan
机构信息
Department of Soil Environmental Sciences, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
China National Rice Research Institute, Hangzhou 310006, China.
出版信息
New Phytol. 2008;177(2):350-356. doi: 10.1111/j.1469-8137.2007.02267.x. Epub 2007 Nov 7.
The quantitative trait loci (QTLs) associated with arsenic (As) accumulation in rice were mapped using a doubled haploid population established by anther culture of F1 plants from a cross between a Japonica cultivar CJ06 and an Indica cultivar TN1 (Oryza sativa). Four QTLs for arsenic (As) concentrations were detected in the map. At the seedling stage, one QTL was mapped on chromosome 2 for As concentrations in shoots with 24.4% phenotypic variance and one QTL for As concentrations in roots was detected on chromosome 3. At maturity, two QTLs for As concentrations in grains were found on chromosomes 6 and 8, with 26.3 and 35.2% phenotypic variance, respectively. No common loci were detected among these three traits. Interestingly, the QTL on chromosome 8 was found to be colocated for As concentrations in grain at maturity and shoot phosphorus (P) concentrations at seedling stage. These results provide an insight into the genetic basis of As uptake and accumulation in rice, and will be useful in identifying genes associated with As accumulation.
利用粳稻品种CJ06与籼稻品种TN1（水稻）杂交的F1植株通过花药培养建立的加倍单倍体群体，对与水稻中砷（As）积累相关的数量性状基因座（QTL）进行了定位。在该图谱中检测到4个与砷（As）浓度相关的QTL。在幼苗期，一个QTL位于第2号染色体上，与地上部As浓度相关，表型变异率为24.4%，另一个与根部As浓度相关的QTL在第3号染色体上被检测到。在成熟期，在第6号和第8号染色体上发现了两个与籽粒中As浓度相关的QTL，表型变异率分别为26.3%和35.2%。在这三个性状中未检测到共同的基因座。有趣的是，发现第8号染色体上的QTL在成熟期与籽粒中As浓度以及幼苗期地上部磷（P）浓度共定位。这些结果为水稻中As吸收和积累的遗传基础提供了深入了解，并将有助于鉴定与As积累相关的基因。
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