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浙江大学学报（农业与生命科学版）
Journal of Zhejiang University (Agriculture and Life Sciences)  2014, Vol. 40 Issue (2): 165-174    DOI: 10.3785/j.issn.1008-9209.2013.08.021
Agricultural sciences     
Identification and physiological characterization of low potassium tolerant germplasm in Tibetan Plateau annual wild barley
Zhu Bo, Zeng Jianbin, Wu Dezhi, Cai Shengguan, Yang Li’na, Zhang Guoping*
(Key Laboratory of Crop Germplasm Resource of Zhejiang Province, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058)
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Abstract  First, a hydroponic experiment was conducted to compare the difference in low potassium (K) tolerance among 99 Tibetan annual wild barley genotypes. The wild barleys that were examined showed a significant difference in low K tolerance, with XZ107, XZ153 and XZ159 being high tolerant, and XZ141 being high sensitive. Second, these four wild barley genotypes as well as two cultivated barley cultivars were used to investigate the genotypic difference in K use efficiency (KUE), net photosynthesis and expression of HvHAK1. The results showed that the values of these parameters were larger in low K tolerant genotypes than in sensitive ones. In addition, the association analysis using DArT markers indicated that tissue K concentration was controlled by multiple genes. The current results also showed that Tibetan annual wild barley may provide elite germplasm or genes for genetic improvement of KUE in barley and other crops, and relative tissue biomass as well as KUE under low K relative to normal K level can be used as the reliable index for evaluating low K tolerance in barley.

Published: 20 March 2014
CLC:  S 512.3  
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Zhu Bo
Zeng Jianbin
Wu Dezhi
Cai Shengguan
Yang Li’na
Zhang Guoping*
Cite this article:

Zhu Bo, Zeng Jianbin, Wu Dezhi, Cai Shengguan, Yang Li’na, Zhang Guoping*. Identification and physiological characterization of low potassium tolerant germplasm in Tibetan Plateau annual wild barley. Journal of Zhejiang University (Agriculture and Life Sciences), 2014, 40(2): 165-174.

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http://www.zjujournals.com/agr/10.3785/j.issn.1008-9209.2013.08.021     OR     http://www.zjujournals.com/agr/Y2014/V40/I2/165


青藏高原一年生野生大麦耐低钾种质的鉴定及其生理特性(英文)

以99份青藏高原一年生野生大麦基因型为材料，通过水培试验比较它们对低钾耐性的基因型差异.结果显示，供试的野生大麦基因型在低钾耐性上差异显著，其中，XZ107、XZ153和XZ159表现出较高的低钾耐性，而XZ141表现为低钾敏感.然后以上述4种低钾耐性不同的野生大麦基因型和钾素利用效率不同的2个栽培品种为材料，研究它们在低钾胁迫条件下的钾素利用效率、净光合速率和HvHAK1表达量的差异.结果表明，以上参数值均为耐低钾基因型显著高于低钾敏感基因型.另外，利用DArT标记进行遗传关联分析表明，大麦组织中的钾含量受多基因控制.表明青藏高原一年生野生大麦可为栽培大麦及其他作物的钾素高效育种提供有益的种质及基因，在低钾与正常钾素水平下的相对干物质质量和钾素利用效率是评估大麦低钾耐性的可靠指标.
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