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Assessing tolerance to Asian soybean rust in soybean inbred lines from exotic and adapted crosses
Euphytica ( IF 1.6 ) Pub Date : 2020-03-27 , DOI: 10.1007/s10681-020-02597-8
Fernando Garcia Espolador , Rafael Massahiro Yassue , Júlia Silva Morosini , Elesandro Bornhofen , Pedro Augusto Medeiros Barbosa , Renan Silva e Souza , Natal Antonio Vello

Asian soybean rust (ASR) is one of the most important diseases in soybean and is responsible for large economic losses. However, the use of tolerant genotypes is a sustainable strategy to address this issue. The aims of this study were to evaluate the tolerance to ASR across agronomic traits and to characterize the genetic control of the tolerance to this disease. We evaluated 257 inbreed lines from North Carolina Design II between four exotic parents and five adapted ones over F 5:6 and F 5:7 generations in management practices with and without ASR control. The traits seed yield (SY), hundred-seed weight (HSW), number of days to maturity (NDM), plant height at maturity, and agronomic value (AV) were considered to perform the rust difference (RD) index, analysis of variance, combining ability, and correlations. The SY, HSW, and NDM were significant to the line × management interaction, enabling selection for tolerance, and 44.7% of the lines demonstrated simultaneous tolerance to these traits based on the RD significance parameter. The correlations between the RD indices were nonsignificant with the exception of the RD for SY and AV. Our results suggest that the SY for the inbred lines is controlled by additive and parental additive-by-additive epistatic effects, while the tolerance for the SY is controlled by recombinant additive-by-additive epistatic effects. In addition, the results indicate that tolerance to Asian soybean rust occurs with different traits that are independent from one another. Therefore, tolerance should be addressed using a multitrait approach.

中文翻译:

评估来自外来和适应杂交的大豆自交系对亚洲大豆锈病的耐受性

亚洲大豆锈病(ASR)是大豆最重要的病害之一,造成巨大经济损失。然而,使用耐受基因型是解决这个问题的可持续策略。本研究的目的是评估农艺性状对 ASR 的耐受性,并表征对该病害耐受性的遗传控制。我们在有和没有 ASR 控制的管理实践中评估了来自北卡罗来纳州设计 II 的 257 条近交系,在 F 5:6 和 F 5:7 世代的四个外来亲本和五个适应的亲本之间。性状种子产量(SY)、百粒重(HSW)、成熟天数(NDM)、成熟株高和农艺价值(AV)被考虑执行锈病差异(RD)指数,分析方差、组合能力和相关性。SY、HSW、和 NDM 对品系×管理交互作用显着,可以选择耐受性,并且 44.7% 的品系根据 RD 显着性参数表现出对这些性状的同时耐受性。除了 SY 和 AV 的 RD 外,RD 指数之间的相关性不显着。我们的结果表明,自交系的 SY 受加性和亲本加性上位效应控制,而对 SY 的耐受性受重组加性加性上位效应控制。此外,结果表明对亚洲大豆锈病的耐受性发生在不同的相互独立的性状中。因此,应使用多特征方法来解决容忍问题。根据 RD 显着性参数,7% 的品系同时表现出对这些性状的耐受性。除了 SY 和 AV 的 RD 外,RD 指数之间的相关性不显着。我们的结果表明,自交系的 SY 受加性和亲本加性上位效应控制,而对 SY 的耐受性受重组加性加性上位效应控制。此外,结果表明对亚洲大豆锈病的耐受性发生在不同的相互独立的性状中。因此,应使用多特征方法来解决容忍问题。根据 RD 显着性参数,7% 的品系同时表现出对这些性状的耐受性。除了 SY 和 AV 的 RD 外,RD 指数之间的相关性不显着。我们的结果表明,自交系的 SY 受加性和亲本加性上位效应控制,而对 SY 的耐受性受重组加性加性上位效应控制。此外,结果表明对亚洲大豆锈病的耐受性发生在不同的相互独立的性状中。因此,应使用多特征方法来解决容忍问题。我们的结果表明,自交系的 SY 受加性和亲本加性上位效应控制,而对 SY 的耐受性受重组加性加性上位效应控制。此外,结果表明对亚洲大豆锈病的耐受性发生在不同的相互独立的性状中。因此,应使用多特征方法来解决容忍问题。我们的结果表明,自交系的 SY 受加性和亲本加性上位效应控制,而对 SY 的耐受性受重组加性加性上位效应控制。此外,结果表明对亚洲大豆锈病的耐受性发生在不同的相互独立的性状中。因此,应使用多特征方法来解决容忍问题。
更新日期:2020-03-27
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