Large-scale screening for Aegilops tauschii tolerant genotypes to phosphorus deficiency at seedling stage
Large-scale screening for Aegilops tauschii tolerant genotypes to phosphorus deficiency at seedling stage
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DOI：
10.1007/s10681-014-1327-6
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发表时间：
2015-08
期刊：
影响因子：
1.9
通讯作者：
Lang Wang;Kun Liu;Shuangshuang Mao;Zhanyi Li;Yanli Lu;Jirui Wang;Yaxi Liu;Yuming Wei;Youliang Zh
中科院分区：
文献类型：
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作者：
Lang Wang;Kun Liu;Shuangshuang Mao;Zhanyi Li;Yanli Lu;Jirui Wang;Yaxi Liu;Yuming Wei;Youliang Zh
节节麦作为小麦的野生近缘种，对生物/非生物因子具有广泛的抗性。为了更好地利用和为改良耐低磷育种提供遗传基础，对耐磷性A进行了大规模筛选。采用水培方法进行了黄瓜缺磷试验。总计380A。利用苗期根系测定了两个品种的耐低磷能力。结果表明，与施磷条件相比，供试性状在380A间的遗传变异较大。在不施磷条件下，表型差异显著。遗传力估计表明，根干重、地上部干重和总干重具有较高的遗传力。主成分(PC)分析表明，前4个主成分解释了总变异的81.387-10%。S测定值和耐低磷指数显示ALLA。其类型可分为高耐受组(17%)、中耐受组(58%)和低耐受组(25%)。与其他栽培小麦相比，用S评价值和PDTI值计算，耐性排名前五位的A。与其他栽培小麦相比，节麦品种具有更强的耐低磷能力。总之，我们对Large-Scalea进行了系统的评估。选择了63个耐性品系和部分根系性状作为选择标准。耐受性排名前五的A。与其他类型的小麦相比，tauschiigo型具有较高的耐性，可进一步用于小麦的遗传改良和非生物抗逆性分子育种。
Aegilops tauschii, as one of wheat wild relatives, possesses a wide range of resistance to biotic/abiotic factors. To better utilize and provide the genetic basis of breeding for improving phosphorus deficiency tolerance, large-scale screening for tolerantA. tauschiito phosphorus deficiency was conducted using hydroponic experiment. A total of 380A. tauschiigenotypes were used to evaluate their phosphorus deficiency tolerance using root system at seedling stage. The results indicate that compared to applied phosphorus condition, genetic variation of the tested traits among 380A. tauschiigenotypes was significant under non-applied phosphorus condition. Heritability estimates showed that root dry weight, shoot dry weight, and total dry weight is highly inheritable. Principal component (PC) analysis showed that first four PCs explained 81.387 % of total variation. S value and phosphorus deficiency tolerance index (PDTI) showed that allA. tauschiigenotypes can be divided into three groups, high (17 %), moderate (58 %) and low (25 %) tolerance groups. Compared with other cultivated wheat using S value and PDTI, the top five tolerantA. tauschiigenotypes have stronger ability of phosphorus deficiency tolerance than other cultivated wheat. In conclusion, we systematically evaluated large-scaleA. tauschiigenotypes, and 63 tolerant lines and some root traits used as selection criteria were selected. The top five tolerantA. tauschiigenotypes have relative higher tolerance than other wheat, and can be further used for wheat genetic improvement and molecular breeding for abiotic stress tolerance.