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首页> 外文期刊>African Journal of Biotechnology >Screening maize (Zea mays L.) hybrids for salt stress tolerance at germination stage
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Screening maize (Zea mays L.) hybrids for salt stress tolerance at germination stage

机译：筛选玉米（Zea mays L.）杂交种发芽期耐盐胁迫

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摘要

Plant breeding may provide a relatively cost effective short-term solution to the salinity problem by producing cultivars that are able to remain productive at low to moderate levels of salinity. To determine the most tolerant hybrid to salinity stress, an experiment was performed as factorial form under completely randomized design (CRD) with three replications. Hybrid factor consisted of fifteen hybrids and five levels of stress (0, -0.3, -0.6, -0.9 and -1.2 MPa). Results indicated that significant decrease was observed in germination percentage, germination rate, root length, shoot length, seedling length and seed vigour traits in stress conditions. Hybrid K166B×K47/2-2-21-2-1-1-1 showed the highest germination percentage, root length, shoot length, seedling length and seed vigour traits in salinity conditions. Results of cluster analysis using the data for all measured traits under different levels of salinity stress (Ward’s minimum variance method) showed clustered hybrids in three groups; Hybrid K166B×K47/2-2-21-2-1-1-1 in the third cluster, hybrids K18×K47/2-2-21-2-1-1-1 and K3651/1×K166A in?the?second cluster, and twelve other hybrids were in?the?first cluster. Hybrid K166B×K47/2-2-21-2-1-1-1 was found to be tolerant, while hybrids of?the?first cluster were sensitive to salt.
机译：通过育种能够在低至中等盐度水平下保持生产力的品种，植物育种可以为盐度问题提供相对成本有效的短期解决方案。为了确定对盐胁迫最耐受的杂种，在完全随机设计（CRD）下以阶乘形式进行了一次实验，并进行了三个重复。混合因子由15个混合体和5个应力水平（0，-0.3，-0.6，-0.9和-1.2 MPa）组成。结果表明，在胁迫条件下，发芽率，发芽率，根长，苗长，幼苗长和种子活力性状均明显降低。在盐度条件下，杂种K166B×K47 / 2-2-21-2-1-1-1具有最高的发芽率，根长，枝长，幼苗长和种子活力。使用不同盐分胁迫水平下所有测得性状的数据进行聚类分析的结果（沃德最小方差法）显示了三组聚类杂交。第三个集群中的混合动力K166B×K47 / 2-2-21-2-1-1-1，第二个集群中的混合动力K18×K47 / 2-2-21-2-1-1-1和K3651 / 1×K166A第二个群集，其他十二个杂种在第一个群集中。发现杂种K166B×K47 / 2-2-21-2-1-1-1具有耐性，而第一簇的杂种对盐敏感。

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