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首页> 外文期刊>Crop and Pasture Science >Variation in growth, development, and yield of durum wheat in response to high soil boron. II. Differences between genotypes
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Variation in growth, development, and yield of durum wheat in response to high soil boron. II. Differences between genotypes

机译：高硼土壤对硬质小麦生长，发育和产量的影响。二。基因型之间的差异

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摘要

This greenhouse study examined the variation in growth, development, and yield between 9 durum wheat (Triticum turgidum L. var. durum Desf., syn. T. durum) lines in response to high soil boron (B) levels. The lines were selected to represent the range of B-toxicity tolerance in an earlier screening experiment. Three soil B levels (hot-water extractable B concentrations of 0·3, 7·1, and 17·4 mg/kg, designated as B0, B25, and B50, respectively) were set up by mixing different amounts of boric acid with soil. Foliar B-toxicity symptom score, dry weight, and shoot-B concentration were measured at tillering. Agronomic traits and yield were measured. There were differential responses to high soil B levels between the durum lines. The boron×line interaction was significant for B-toxicity symptom score and shoot-B concentration. Based on these 2 characters, and percentage of shoot dry weight and grain yield reduction from B0 to B50, Oued Zenati, Omrabi-5, and Gezira-17 were the most tolerant of the 9 durum lines, yet they were less tolerant to high soil B levels than the tolerant bread-wheat check, Halberd. Nonetheless, until more tolerant materials are developed, these moderately tolerant durum lines could still be useful for areas, like southern Australia, where B toxicity is a problem.
机译：这项温室研究调查了9个硬质小麦（Triticum turgidum L. var。durum Desf。，同质T. durum）品系对土壤高硼（B）水平响应的生长，发育和产量变化。选择这些线以代表较早的筛选实验中B毒性耐受性的范围。通过将不同量的硼酸与水混合，设置了三种土壤B水平（可热水提取的B浓度为0·3、7·1和17·4 mg / kg，分别命名为B0，B25和B50）。泥。分till时测量叶面B毒性症状评分，干重和芽B浓度。测定农艺性状和产量。硬质线之间对高土壤B水平有不同的反应。硼×线相互作用对B-毒性症状评分和芽-B浓度具有重要意义。基于这两个性状，以及从B0到B50的茎干重量百分比和籽粒减产百分比，Oued Zenati，Omrabi-5和Gezira-17在9个硬粒小麦品种中最耐，但对高土壤的耐性却较低。 B水平超过宽容的面包小麦检查，戟。尽管如此，在开发出更多的耐受性材料之前，这些中等耐受性的硬质线仍可用于诸如B毒性问题的澳大利亚南部地区。

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