中文摘要：瓦斯蒂克辣椒黄脉病毒（PHYVV）是影响墨西哥辣椒的主要病毒之一。为什么目前还没有针对PHYVV的辣椒抗性品种？是否应该归因于缺乏新的辣椒抗性来源和关于抗性性状的遗传力知识？本研究于2013年至2014年在墨西哥锡那罗亚库利亚坎进行了两次试验，试验采用了温室条件下在S2和S3代中具有抗性的三个野生辣椒品系，分析其对瓦斯蒂克辣椒黄脉病毒（PHYVV）的抗性及其遗传力。研究结果显示：UAS12系是最具有前景的遗传资源，具有较高的抗性且表现出抗性性状的遗传力。品系UAS13和UAS10的中等抗性也可用于育种计划。至少有两个基因与PHYVV的抗性性状相关。这些品系中显示的部分抗性可能是因为“CchGLP”基因的存在。UAS12品系可以用于提高抗性，而其他两个品系可能是稳定的，因为它们没有显示遗传性。
外文摘要：Background: Pepper huasteco yellow vein virus (PHYVV) is one of the main viruses affecting pepper (Capsicum spp.) plants in Mexico. Question: Why there are no pepper resistant cultivars to PHYVV currently? Could it be due for the lack of new pepper resistant sources and knowledge about the heritability of the resistant trait? Study species: Capsicum annuum, Pepper huasteco yellow vein virus and Bemisia tabaci. Study site: Culiacan Sinaloa, Mexico; January 2013 to August 2014.Methods: Two assays were performed in 2013 and 2014 with three resistant wild lines of Capsicum annuum in the S2 and S3 generation under greenhouse conditions to analyze the resistance to the Pepper huasteco yellow vein virus (PHYVV) and its heritability. Plants were inoculated with PHYVV through Bemisia tabaci G. and by grafting.Results: Line UAS12 showed a significantly higher proportion of resistant plants, longer incubation time, and less amount of viral DNA, followed by lines UAS13, UAS10 and the Maverick cultivar under both inoculation methods in both assays. Distribution of symptoms revealed a bimodal tendency in both assays. The novel gene "CchGLP" which confer resistance to PHYVV in pepper plants, was identified in the three lines evaluated on this study. Heritability of line UAS12 was of 0.35 and 0.26 in the insects and grafting inoculations, and of 0.58 and 0.10 in the first and second assays, respectively. Lines UAS13 and UAS10 showed close to zero heritability in the first and second assays with both inoculation methods.
Conclusions: Line UAS12 is the most promising genetic resource for its high resistance and for showing heritability for the resistance trait. The intermediate resistance of lines UAS13 and UAS10 could be also useful for breeding programs. At least two genes are involved in the resistance trait to PHYVV. Part of the resistance shown in these lines may be due to the presence of the "CchGLP" gene. Line UAS12 count with variability for the resistant trait and can, therefore, be used to improve resistance and the other two lines possibly are stable as they did not show heritability.
外文关键词：Capsicum annuum; Gene CchGLP; Heritability; PHYVV; Resistance
作者：Enrique Retes-Manjarrez, Jesus; Hernandez-Verdugo, Sergio; Pariaud, Benedicte; 等
作者单位：Univ Autonoma Sinaloa
期刊名称：BOTANICAL SCIENCES
期刊影响因子：0.936
出版年份：2018
出版刊次：3
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