Aluminum‐tolerant wheat (Triticum aestivum L.) cultivars are often employed to damper the yield‐limiting impacts of Al toxicity in acidic soils. Tolerance is often facilitated by the Al‐activated malate transporter 1 (ALMT1) gene, which increases anion permeability of wheat roots and exudes malate in the presence of Al. However, few studies have explored the phenotypic incongruities of closely related genotypes with ALMT1(+) or without ALMT1(−). A field study initiated in Stillwater, OK, on an Easpur loam (fine‐loamy, mixed, superactive, thermic Fluventic Haplustolls) was established to determine the Al tolerance of eight related winter wheat cultivars chosen for presence or absence of ALMT1 [Duster (+), Lonerider (+), OK14319 (+), Jagger (+), Iba (−), Gallagher (−), Spirit Rider (−), Smith's Gold (−)]. Significant differences were found among cultivars in their forage yield responses to Al concentration and soil acidity. Duster (first), Spirit Rider (second), and Gallagher (third) were the most acid tolerant and consistent in forage yield across study years. However, no such trend was observed in the grain yields of any of the cultivars, as there was no clear semblance of acid tolerance in grain yields between study years. Despite the similarity of genetic backgrounds, forage and grain yield productivity of cultivars in this study varied between years and was not wholly dependent on the presence or absence of the ALMT1 gene. Nevertheless, the utilization of acid‐tolerant winter wheat cultivars has the potential to significantly reduce forage yield loss under acidic soil conditions with high Al concentrations.

中文翻译：

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美国大平原酸性土壤中密切相关的冬小麦品种表现

耐铝小麦（Triticum aestivum L.）品种通常用于抑制酸性土壤中Al毒性对产量的限制。铝激活的苹果酸转运蛋白1（ALMT1）基因通常可以促进耐受性，该基因增加小麦根的阴离子渗透性，并在铝存在下散发苹果酸。但是，很少有研究探索具有ALMT1（+）或不具有ALMT1（-）的紧密相关基因型的表型不一致。在俄克拉荷马州的斯蒂斯沃特，对伊斯普尔壤土（细壤，混合，活性，高温Fluventic Haplustolls）进行了田野研究，以确定八个有无ALMT1的相关冬小麦品种的耐铝性[除尘器（+），活动者（+），OK14319（+），贾格尔（+），伊巴（-），加拉格尔（-），圣灵骑士（-），史密斯金（-）]。品种之间的饲草产量对铝浓度和土壤酸度的反应存在显着差异。在整个研究年度中，Duster（第一），Spirit Rider（第二）和Gallagher（第三）是最耐酸的，并且饲草产量始终保持一致。然而，在任何一个品种的谷物产量中都没有观察到这种趋势，因为在研究年份之间，谷物产量中没有明显的耐酸性。尽管遗传背景相似，但本研究中各品种的草料和谷物产量仍在不同年份之间变化，并且并不完全取决于ALMT1的存在与否。基因。然而，耐酸的冬小麦品种的利用具有显着降低高铝浓度酸性土壤条件下牧草产量损失的潜力。