Letícia da Silva Araújo, Alexandre Pio Viana, Silvaldo Felipe da Silveira, Beatriz Murizini Carvalho, Débora Souza Mendes, Joameson Antunes Lima
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引用次数: 0
摘要
桃金娘锈病严重影响番石榴的种植。目前，尚未发现抗锈病的番石榴栽培品种。本研究旨在利用混合模型从番石榴属植物的种间杂交种中鉴定抗锈病植物。2020 年 9 月至 10 月，在温室中对 26 个杂交品种进行了评估。对幼叶和花蕾进行接种，测量潜伏期、传染期和病程曲线下面积等特征，以确定方差成分和遗传参数。对基因型值进行分析，并使用混合模型对克隆进行排序。遗传、环境和广义遗传率值从中等到高等不等。混合模型揭示了锈病抗性的遗传变异。Cv1 x Cv11 和 Cv8 x Cv11 杂交的克隆对锈病免疫。P36 x P11 杂交表现出变异性。这项研究的结果表明，应选择对锈病有免疫力和抗性的克隆用于未来的基因重组。
Mixed models in the selection of interspecific crosses of Psidium spp. resistant to myrtle rust
Myrtle rust severely impacts guava cultivation. Currently, no rust-resistant guava cultivars have been found. This study aimed to identify rust-resistant plants from interspecific crosses of Psidium spp. using mixed models. Twenty-six crosses were evaluated in a greenhouse from September to October 2020. Inoculation was performed on young leaves and floral buds, and characteristics such as the latent period, infectious period, and area under the disease progress curve were measured to determine variance components and genetic parameters. Genotypic values were analyzed, and clones were ranked using mixed models. The genetic, environmental, and broad-sense heritability values varied from moderate to high. Mixed models revealed genetic variability for rust resistance. Clones from the Cv1 x Cv11 and Cv8 x Cv11 crosses were immune to rust. The P36 x P11 cross exhibited variability. The results of this study indicate the selection of clones that are immune and resistant to rust for use in future recombination.
期刊介绍：
The European Journal of Plant Pathology is an international journal publishing original articles in English dealing with fundamental and applied aspects of plant pathology; considering disease in agricultural and horticultural crops, forestry, and in natural plant populations. The types of articles published are :Original Research at the molecular, physiological, whole-plant and population levels; Mini-reviews on topics which are timely and of global rather than national or regional significance; Short Communications for important research findings that can be presented in an abbreviated format; and Letters-to-the-Editor, where these raise issues related to articles previously published in the journal. Submissions relating to disease vector biology and integrated crop protection are welcome. However, routine screenings of plant protection products, varietal trials for disease resistance, and biological control agents are not published in the journal unless framed in the context of strategic approaches to disease management.
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