Abstract The current study evaluated the development and growth of three major rapeseed genotypes (Hyola308, Hyola401, and RGS003 as early-, mid-, and late-maturity genotypes, respectively) as well as seed yield under different irrigation regimes (full irrigation, withholding irrigation at the flowering stage, withholding irrigation at the pod initiation stage, and withholding irrigation at the seed filling period) and also the spatial yield potential. APSIM-Canola model was applied to investigate the response of rapeseed genotypes to irrigation regimes in ten locations. Simulated results indicated that yield potential for rapeseed production was higher in the west which is a temperate agro-climatic zone (2852.6 kg ha−1) than in the southwest which is a hot agro-climatic zone (1885.1 kg ha−1). Although Hyola401 (the mid-maturity genotype) had the maximum seed yield (2798.4 kg ha−1), RGS003 (the late-maturity genotype) was found to be more drought-resistant due to a lower decrease in seed yield (18.1 %) under water-limited conditions compared with full irrigation conditions. The current findings suggest that the mid-maturity genotype has more yield potential in the studied locations (with different climates and soils) under full irrigation conditions due to higher seed yield, and the late-maturity genotype can be suggested as a resistant genotype for future breeding programs to introduce new-high-yielding genotypes with high drought tolerance, especially in drought-prone environments. Furthermore, withholding irrigation at seed filling onwards, which showed the lowest decrease in seed yield (13.6 %), can be recommended as a strategy for water-saving at the end of the growing season, and farmers can allocate irrigation water to other crops.

中文翻译：

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将停止灌溉制度和抗旱基因型作为在易干旱环境中增加油菜籽产量的策略：一种建模方法

摘要 本研究评估了三种主要油菜籽基因型（Hyola308、Hyola401 和 RGS003 分别为早熟、中熟和晚熟基因型）的发育和生长以及不同灌溉制度（全灌、截留）下的种子产量。花期灌溉、荚果萌发期停灌、灌浆期停灌）以及空间产量潜力。应用 APSIM-Canola 模型来研究油菜籽基因型对十个地点灌溉制度的响应。模拟结果表明，西部温带农业气候区（2852.6 kg ha-1）油菜籽产量潜力高于西南炎热农业气候区（1885.1 kg ha-1）。尽管 Hyola401（中熟基因型）的种子产量最高（2798.4 kg ha-1），但由于种子产量下降幅度较小（18.1 %），发现 RGS003（晚熟基因型）更耐旱与全灌溉条件相比，在限水条件下。目前的研究结果表明，由于较高的种子产量，中熟基因型在研究地点（具有不同气候和土壤）在充分灌溉条件下具有更大的产量潜力，并且晚熟基因型可以被认为是未来的抗性基因型育种计划，以引入具有高耐旱性的新高产基因型，尤其是在干旱易发环境中。此外，在种子灌浆后停止灌溉，种子产量下降幅度最小（13.6%），