Reducing the number of tillers per plant using a tiller inhibition (tin ) gene has been considered as an important trait for wheat production in dryland environments. We used a spatial analysis approach with a daily time‐step coupled radiation and transpiration efficiency model to simulate the impact of the reduced‐tillering trait on wheat yield under different climate change scenarios across Australia's arable land. Our results show a small but consistent yield advantage of the reduced‐tillering trait in the most water‐limited environments both under current and likely future conditions. Our climate scenarios show that whilst elevated [CO₂] (e[CO₂]) alone might limit the area where the reduced‐tillering trait is advantageous, the most likely climate scenario of e[CO₂] combined with increased temperature and reduced rainfall consistently increased the area where restricted tillering has an advantage. Whilst long‐term average yield advantages were small (ranged from 31 to 51 kg ha⁻¹ year⁻¹), across large dryland areas the value is large (potential cost‐benefits ranged from Australian dollar 23 to 60 MIL/year). It seems therefore worthwhile to further explore this reduced‐tillering trait in relation to a range of different environments and climates, because its benefits are likely to grow in future dry environments where wheat is grown around the world.

中文翻译：

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分iller性状降低表明旱地小麦产量小但重要的增产。

减少使用单株分蘖数吨Iller河畔在hibition（锡）基因已被认为是用于小麦生产旱地环境的一个重要性状。我们使用空间分析方法以及每日时步辐射和蒸腾效率模型，来模拟澳大利亚耕地在不同气候变化情景下分t性状对小麦产量的影响。我们的结果表明，在当前和未来可能出现的水限制最大的环境中，减少分t性状具有很小但持续的产量优势。我们的气候情景表明，虽然[CO ₂ ]（e [CO ₂]）本身可能会限制分iller性状有利的地区，最有可能出现e [CO ₂ ]的气候情景，再加上温度升高和降雨减少，这会持续增加分restricted有利的地区。尽管长期平均单产优势较小（范围从31到51千克公顷- ¹ 年^-1），但在大片干旱地区，价值却很大（潜在的成本收益范围从23澳元到6000万澳元/年）。因此，似乎有必要针对各种不同的环境和气候条件进一步探索这种分reduced减少的特征，因为在世界各地都有小麦生长的未来干旱环境中，其好处可能会增加。