Comparison of responses to drought stress of 100 wheat accessions and landraces to identify opportunities for improving wheat drought resistance
Comparison of responses to drought stress of 100 wheat accessions and landraces to identify opportunities for improving wheat drought resistance
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DOI：
10.1111/j.1439-0523.2011.01941.x
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发表时间：
2012-06-01
期刊：
影响因子：
2
通讯作者：
Surlan-Momirovic, Gordanas
中科院分区：
文献类型：
--
作者：
Dodig, Dejan;Zoric, Miroslav;Surlan-Momirovic, Gordanas
附有5图5表小麦地方品种摘要，从西巴尔干地区收集的小麦品种，被认为是小麦抗旱育种的潜在遗传资源。一组20个地方品种与80个小麦种质的世界各地的起源进行了测试，在4年的田间试验下，两种浇水制度：充分灌溉和下一个防雨小区庇护所。测定了14个农艺性状对干旱胁迫的响应，并计算了4个选择指数：平均生产力（MP）、胁迫耐性（TOL）、胁迫敏感指数（SSI）和胁迫耐性指数（STI）。在两种管理模式下，地方品种的平均产量均显著低于种质，且没有证据表明地方品种的产量稳定性优于种质。然而，TOL是更好的地方品种比加入，和产量相关的几个性状表现出遭受水分亏缺（即每穗粒数）。在地方品种中，相对较宽的多样性（CV 10.218.9%），发现大多数的性状，可以被利用为提高耐旱性的新品种的东南欧的可变干旱条件。
With 5 figures and 5 tables Abstract Landraces of wheat (Triticum aestivum L.), collected from the Western Balkans, were considered as a potential genetic resource of drought resistance for wheat breeding. A group of 20 landraces with 80 wheat accessions of worldwide origin were tested in 4-year field trials under two watering regimes: fully irrigated and under a rain-out plot shelter. Fourteen agronomic traits were evaluated for their responses to drought stress, and four selection indices were calculated: mean productivity (MP), stress tolerance (TOL), stress susceptibility index (SSI) and stress tolerance index (STI). The average yield of landraces was significantly lower than that of accessions under both regimes, and there was no evidence that yield stability of landraces was better than that of accessions. However, TOL was better in landraces than in accessions, and several traits related to yield were shown to suffer less under water deficit (i.e. kernels per spike). Amongst landraces, relatively wide diversity (CV 10.218.9%) was found for most of the traits that can be exploited for improving drought tolerance of new varieties for the variable rainfed conditions of south-eastern Europe.