A comparison of screening methods to identify waterlogging tolerance in the field in Brassica napus L. during plant ontogeny.
A comparison of screening methods to identify waterlogging tolerance in the field in Brassica napus L. during plant ontogeny.
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DOI：
10.1371/journal.pone.0089731
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Zhang X
中科院分区：
文献类型：
--
作者：
Zou X;Hu C;Zeng L;Cheng Y;Xu M;Zhang X
耐涝性通常在特定的发育阶段进行评估，隐含的假设是这些系统中表达的耐涝性差异将导致田间产量表现的改善。有必要在实地考察这些标准。以25份甘蓝型油菜（Brassica napus L.）品种在不同发育阶段，如在受控环境下的幼苗期和苗期，以及在田间的成熟期。对3个生育期生理指标的评价表明，各生育期的耐涝性存在差异，为进一步选育耐涝材料提供了重要依据。结果表明，山洪内涝对植物生长有一定的抑制作用，解除胁迫后植物生长仍能恢复。产量耐涝系数与其他性状的相关分析表明，各基因型的耐涝性在成熟期前具有一致性，苗期和成苗期耐涝性好可以保证后期的耐涝性。在任何时期都可以利用一些特定的性状进行耐涝植物的选择，在苗期选择效果更好。本研究为耐涝种质的筛选提供了方法，为大量耐涝种质或耐涝育种群体的初步筛选奠定了基础，并有助于验证其在作物改良中的潜在应用价值。
Waterlogging tolerance is typically evaluated at a specific development stage, with an implicit assumption that differences in waterlogging tolerance expressed in these systems will result in improved yield performance in fields. It is necessary to examine these criteria in fields. In the present study, three experiments were conducted to screen waterlogging tolerance in 25 rapeseed (Brassica napus L.) varieties at different developmental stages, such as seedling establishment stage and seedling stage at controlled environment, and maturity stage in the fields. The assessments for physiological parameters at three growth stages suggest that there were difference of waterlogging tolerance at all the development stages, providing an important basis for further development of breeding more tolerant materials. The results indicated that flash waterlogging restricts plant growth and growth is still restored after removal of the stress. Correlation analysis between waterlogging tolerance coefficient (WTC) of yield and other traits revealed that there was consistency in waterlogging tolerance of the genotypes until maturity, and good tolerance at seedling establishment stage and seedling stage can guarantee tolerance in later stages. The waterlogging-tolerant plants could be selected using some specific traits at any stage, and selections would be more effective at the seedling establishment stage. Thus, our study provides a method for screening waterlogging tolerance, which would enable the suitable basis for initial selection of a large number of germplasm or breeding populations for waterlogging tolerance and help for verifying their potential utility in crop-improvement.
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影响因子：
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作者：
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影响因子：
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