Genetic Diversity and Response of Melon Accessions to Monosporascus cannonballus

IF 1.1 4区 农林科学 Q3 PLANT SCIENCES Journal of Phytopathology Pub Date : 2024-09-02 DOI:10.1111/jph.13384
Sabrina Queiroz de Freitas, Andréia Mitsa Paiva Negreiros, Glauber Henrique de Sousa Nunes, Allinny Luzia Alves Cavalcante, Fernanda Jessica Queiroz Santos, Dariane Monteiro Viana, Naama Jessica de Assis Melo, Rui Sales Júnior
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Abstract

Melon holds significant economic importance for Brazilian agribusiness. It exhibits high polymorphism and genetic variability, yet knowledge regarding its genetic diversity and response to root diseases remains limited. Therefore, this study aimed to assess the genetic diversity and response of melon plant accessions to Monosporascus cannonballus. Two trials were conducted involving 29 melon accessions and a commercial hybrid of the yellow melon plant, Natal RZ. In the first trial, the accessions and the commercial hybrid were grown in the field under a randomised complete block design with three replications. They were evaluated for fruit-related descriptors: number of fruits per plant (NFP), average fruit weight, shape index, pulp thickness, pulp firmness (PF) and total soluble solids (TSS). Standardised Euclidean distances were calculated on the basis of the results, and the accessions were grouped using the UPGMA method. In the second trial, the melon plant accessions and commercial hybrid were cultivated in a greenhouse under a completely randomised design with 12 replications. For inoculation, wheat grains infested with M. cannonballus isolate CMM-2429 were used. Evaluations were conducted 60 days after transplanting, assessing the incidence and severity of the disease, and biometric variables. The study revealed genetic variability among the evaluated accessions for fruit descriptors and response to M. cannonballus. Most divergent accessions were A16, A53, NZR, A28, A51 and A44, with divergence primarily observed in NFP, PF and TSS. Promising accessions for breeding programmes aimed at resistance to M. cannonballus included A01, A04, A25, A27 (moderately resistant) and A26 (highly resistant to the pathogen).

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甜瓜品种的遗传多样性和对大炮球单孢蘑菇的反应
甜瓜对巴西农业综合企业具有重要的经济意义。甜瓜具有很高的多态性和遗传变异性,但有关其遗传多样性和对根部病害反应的知识仍然有限。因此,本研究旨在评估甜瓜植物品种的遗传多样性和对炮弹单孢菌的反应。本研究进行了两项试验,涉及 29 个甜瓜品种和一个黄瓜商业杂交种 Natal RZ。在第一项试验中,这些品种和商品杂交种在田间种植,采用随机完全区组设计,三次重复。对它们的果实相关描述指标进行了评估:每株果实数(NFP)、平均果重、形状指数、果肉厚度、果肉坚实度(PF)和总可溶性固形物(TSS)。根据结果计算标准化欧氏距离,并采用 UPGMA 方法对加入的品种进行分组。在第二项试验中,甜瓜品种和商业杂交种在温室中栽培,采用完全随机设计,12 次重复。在接种时,使用了感染了炮弹菌分离物 CMM-2429 的小麦粒。移植 60 天后进行评估,评估病害的发生率和严重程度以及生物计量变量。该研究揭示了受评估品种在果实描述和对炮弹菌反应方面的遗传变异。差异最大的品种是 A16、A53、NZR、A28、A51 和 A44,主要在 NFP、PF 和 TSS 方面存在差异。有望用于抗炮弹菌育种计划的品种包括 A01、A04、A25、A27(中度抗性)和 A26(高度抗病原体)。
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来源期刊
Journal of Phytopathology
Journal of Phytopathology 生物-植物科学
CiteScore
2.90
自引率
0.00%
发文量
88
审稿时长
4-8 weeks
期刊介绍: Journal of Phytopathology publishes original and review articles on all scientific aspects of applied phytopathology in agricultural and horticultural crops. Preference is given to contributions improving our understanding of the biotic and abiotic determinants of plant diseases, including epidemics and damage potential, as a basis for innovative disease management, modelling and forecasting. This includes practical aspects and the development of methods for disease diagnosis as well as infection bioassays. Studies at the population, organism, physiological, biochemical and molecular genetic level are welcome. The journal scope comprises the pathology and epidemiology of plant diseases caused by microbial pathogens, viruses and nematodes. Accepted papers should advance our conceptual knowledge of plant diseases, rather than presenting descriptive or screening data unrelated to phytopathological mechanisms or functions. Results from unrepeated experimental conditions or data with no or inappropriate statistical processing will not be considered. Authors are encouraged to look at past issues to ensure adherence to the standards of the journal.
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