Mapping of chromosome regions conferring boron toxicity tolerance in barley (Hordeum vulgare L.)
Mapping of chromosome regions conferring boron toxicity tolerance in barley (Hordeum vulgare L.)
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DOI：
10.1007/s001220051195
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发表时间：
1999-06-01
影响因子：
5.4
通讯作者：
Langridge, P
中科院分区：
文献类型：
--
作者：
Jefferies, SP;Barr, AR;Langridge, P
在澳大利亚南部、西亚和北非的低降雨量地区，硼毒性已被认为是限制产量的一个重要问题。大麦耐硼毒性的遗传变异已被鉴定，但其遗传方式和控制耐硼性的基因的位置以前并不清楚。人口的150个双单倍体品系之间的杂交硼毒性耐受阿尔及利亚地方品种，撒哈拉3771，和不耐受的澳大利亚品种快船进行了筛选，在四个耐受性试验。利用Clipper × Sahara群体的RFLP连锁图鉴定与大麦耐硼性相关的染色体区域。区间回归作图允许检测四个染色体区域参与测得的耐硼性状。染色体2H上的一个区域与叶症状表达相关，染色体3H上的一个区域与硼毒性对根生长抑制的影响的减少相关，染色体6H上的一个区域与硼吸收减少相关，染色体4H上的一个区域也与硼吸收的控制以及与根长反应相关，干物质生产和症状表现。讨论了分子标记辅助选择在植物耐硼毒育种中的应用价值和潜力。
Boron toxicity has been recognised as an important problem limiting production in the low-rainfall regions of southern Australia, West Asia and North Africa. Genetic variation for boron toxicity tolerance in barley has been characterised but the mode of inheritance and the location of genes controlling tolerance were not previously known. A population of 150 doubled-haploid lines from a cross between a boron toxicity tolerant Algerian landrace, Sahara 3771, and the intolerant Australian cultivar Clipper was screened in four tolerance assays. An RFLP linkage map of the Clipper x Sahara population was used to identify chromosomal regions associated with boron tolerance in barley. Interval regression-mapping allowed the detection of four chromosomal regions involved in the boron tolerance traits measured. A region on chromosome 2H was associated with leaf-symptom expression, a region on chromosome 3H was associated with a reduction of the affect of boron toxicity on root growth suppression, a region on chromosome 6H was associated with reduced boron uptake, and a region on chromosome 4H was also associated with the control of boron uptake as well as being associated with root-length response, dry matter production and symptom expression. The benefits and potential of marker-assisted selection for boron toxicity tolerance are discussed.