Inheritance Analysis of Resistance to Aphid（Myzus persicae）for Pepper Cultivar “Zhudachang”

doi:10.13560/j.cnki.biotech.bull.1985.2017-0711

Abstract

Abstract: Myzus persicae（sulzer）is the major pest in pepper production. Excavating aphid-resistant germplasm resources,clarifying the genetic law and promoting the cultivation of resistant varieties is the important strategy for aphid control. In this study, the aphid-resistant pepper cultivar “Zhudachang” and aphid-susceptible pepper cultivar “Dayangjiaojiao”were used as parent material to develop the genetic population,moreover,the inherited aphid-resistant character of hybrid progeny was analyzed. The results showed that the reciprocal-hybrid F₁ was highly resistant to aphid,while the resistant and susceptible plants in F₂ hybrid fit the separation ratio of 3∶1. In addition,the activities of polyphenol oxidase（PPO）and peroxidase（POD）in aphid-resistant parent,reciprocal-hybrid F₁ and F₂ hybrid of “Zhudachang”significantly increased when infested by aphid,while the activities in either aphid-susceptible parent or reciprocal-hybrid F₂ showed no significant difference. These results indicated that the resistance of pepper to aphid was controlled by dominant single gene,which was stably inherited;besides,the increased activities of PPO and POD was highly correlated to aphid resistance.

Key words: pepper, aphid resistance, inheritance analysis, PPO, POD

LIANG Xiao, WU Chun-ling, CHEN Qing. Inheritance Analysis of Resistance to Aphid（Myzus persicae）for Pepper Cultivar “Zhudachang”[J]. Biotechnology Bulletin, 2018, 34(2): 150-156.

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