Dasgupta Tapash, Hossain Shahid A, Meharg Andrew A, Price Adam H
Department of Plant and Soil Science, School of Biological Sciences, University of Aberdeen, Aberdeen AB24 3UU, UK.
Present address; University College of Agriculture, Calcutta University, 35 B.C. Road, Kolkata 700 019 West Bengal, India; 3Present address; Department of Soil, Water & Environment, University of Dhaka, Dhaka-1000, Bangldesh.
New Phytol. 2004 Jul;163(1):45-49. doi: 10.1111/j.1469-8137.2004.01109.x.
• The genetics of arsenic tolerance in plants has not been extensively studied and no arsenic tolerance gene has been genetically mapped. • Screening 20 diverse genotypes of rice for reduced root growth in 13.3 m arsenate identified marked differences in tolerance. The most sensitive variety, Dawn, is known to be highly susceptible to straighthead, a condition linked to arsenic contamination of soil. • Screening 108 recombinant inbred lines of the Bala × Azucena mapping population revealed the presence of a major gene, AsTol, which mapped between markers RZ516 and RG213 on chromosome 6. • This gene is a good target for further characterisation. It should prove valuable for investigations into the physiological and molecular mechanism behind arsenic tolerance in plants and may lead to strategies aimed at breeding for arsenic contaminated regions.
• 植物对砷耐受性的遗传学尚未得到广泛研究，且尚未对任何砷耐受性基因进行遗传定位。
• 在13.3米砷酸盐环境下筛选20种不同基因型水稻的根系生长减少情况，发现耐受性存在显著差异。最敏感的品种“曙光”已知对直穗病高度敏感，直穗病与土壤砷污染有关。
• 对Bala×Azucena作图群体的108个重组自交系进行筛选，发现了一个主要基因AsTol，它位于第6号染色体上的标记RZ516和RG213之间。
• 该基因是进一步表征的良好目标。它对于研究植物砷耐受性背后的生理和分子机制应具有重要价值，并可能为砷污染地区的育种策略提供指导。
