Grass pea (Lathyrus sativus L.) has a Mediterranean origin and was spread to Western Europe, Africa and South Asia. Over time, this grain legume crop has become important in South Asia, where it is often affected by waterlogging at germination. Therefore, varieties with waterlogging tolerance of seeds at germination are needed. This study evaluated waterlogging tolerance in a grass pea diversity panel. First, morpho-agronomic traits of 53 grass pea genotypes from 7 diverse countries (Afghanistan, Australia, Bangladesh, Cyprus, Ethiopia, Greece and Pakistan) were measured in a glasshouse. Seeds of the collection were then sown into waterlogged soil for 6 days and is subsequently drained for 8 days. Finally, representative genotypes from each country of origin of the three survival patterns (described below) were then tested to identify the effect of seed priming on germination and seedling growth in waterlogged soil. Canonical analysis of six traits (seed weight, pod length, pod width, flowering time, time to maturity and seedling survival) showed that genotypes from Bangladesh and Ethiopia were similar. There was a significant variation amongst genotypes in waterlogging tolerance. Genotypes from Bangladesh and Ethiopia showed the highest percent seedling survival (54% and 47%), with an ability to germinate under waterlogging and then maintain growth from the first day of draining to the final sampling (Pattern 1). In contrast, genotypes from other origins either germinated during waterlogging, but did not survive during drainage (Pattern 2) or failed to germinate and had low seedling survival during waterlogging and drainage (Pattern 3). Priming seeds reduced seedling survival in grass pea. Despite Mediterranean origin, specific ecotypes of grass pea with greater waterlogging tolerance under warm wet conditions have been favoured in Bangladesh and Ethiopia where adaptation to extreme precipitation events at germination and seedling survival upon soil drainage is critical for successful crops.

中文翻译：

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草豌豆（Lathyrus sativus L.）发芽期的耐涝性与原产国有关

草豌豆 (枸杞L.) 起源于地中海，并传播到西欧、非洲和南亚。随着时间的推移，这种谷物豆类作物在南亚变得很重要，在那里它在发芽时经常受到涝灾的影响。因此，需要种子在发芽时具有耐涝性的品种。本研究评估了草豌豆多样性面板的耐涝性。首先，在温室中测量了来自 7 个不同国家（阿富汗、澳大利亚、孟加拉国、塞浦路斯、埃塞俄比亚、希腊和巴基斯坦）的 53 种草豌豆基因型的形态农艺性状。然后将收集的种子播种到浸水的土壤中 6 天，随后排水 8 天。最后，然后测试来自三个生存模式（如下所述）的每个原产国的代表性基因型，以确定种子引发对浸水土壤中发芽和幼苗生长的影响。对六个性状（种子重量、豆荚长度、豆荚宽度、开花时间、成熟时间和幼苗存活率）的典型分析表明，孟加拉国和埃塞俄比亚的基因型相似。耐涝性基因型之间存在显着差异。来自孟加拉国和埃塞俄比亚的基因型显示出最高的幼苗存活率（54% 和 47%），能够在涝渍下发芽，然后从排水的第一天到最终取样（模式 1）保持生长。相比之下，其他来源的基因型要么在涝灾期间萌发，但在排水过程中不能成活（模式2）或在涝排水过程中不能发芽并且幼苗存活率低（模式3）。引发种子降低了草豌豆的幼苗存活率。尽管起源于地中海，但在温暖潮湿的条件下具有更高耐涝性的特定草豌豆生态型在孟加拉国和埃塞俄比亚受到青睐，在这些地方适应极端降水事件的发芽和土壤排水后的幼苗存活对于作物的成功至关重要。