Biovar-specific and broad-spectrum sources of resistance to bacterial wilt (Ralstonia solanacearum) in Capsicum

IF 1.3 4区农林科学 Q3 AGRONOMY

Crop Breeding and Applied Biotechnology Pub Date : 2004-09-30 DOI:10.12702/1984-7033.V04N03A14

C. A. Lopes, L. Boiteux

引用次数: 18

Abstract

No report has so far investigated either the biovar-specific or broad-spectrum reaction to Ralstonia solanacearum (RS) in Capsicum germplasm. Twenty-three accessions described as resistant to RS in different countries were challenged with Brazilian biovar I and biovar III isolates. Differences were observed among accessions and within biovar III isolates. In addition, isolates of biovar III were more aggressive than biovar I, reinforcing field observations which indicated that RS biovar III is predominant and more virulent and aggressive than biovar I isolates on Capsicum. Accessions previously reported as extremely resistant to RS in Asia exhibited slight wilt symptoms when challenged with Brazilian isolates. However, the high resistance levels in the inbred lines ‘MC-4’, ‘PBC 631’, ‘PBC 066’, ‘PBC 1347’, and ‘PBC 473’ make these accessions suitable for breeding programs aiming to develop pungent and/or sweet cultivars with a stable, broad-spectrum RS-resistance.

查看原文本刊更多论文

辣椒对青枯病(Ralstonia solanacearum)抗性的生物多样性和广谱来源

目前还没有研究辣椒种质中对枯枯菌(Ralstonia solanacearum, RS)生物特异反应或广谱反应的报道。在不同国家被描述为对RS具有抗性的23个品种受到巴西生物变种I和生物变种III分离株的挑战。不同品种间和生物多样性ⅲ型分离株间存在差异。此外，生物变种III的分离株比生物变种I更具侵略性，这进一步证实了RS生物变种III在辣椒上的优势，并且比生物变种I的分离株更具毒力和侵略性。以前在亚洲报道的对RS具有极强抗性的品种在受到巴西分离株的攻击时表现出轻微的枯萎症状。然而，自交系“MC-4”、“PBC 631”、“PBC 066”、“PBC 1347”和“PBC 473”的高抗性水平使这些材料适合于培育具有稳定、广谱抗rs的辛辣和/或甜品种的育种计划。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Crop Breeding and Applied Biotechnology AGRONOMY-BIOTECHNOLOGY & APPLIED MICROBIOLOGY

CiteScore

2.70

自引率

13.30%

发文量

审稿时长

6-12 weeks

期刊介绍： The CBAB – CROP BREEDING AND APPLIED BIOTECHNOLOGY (ISSN 1984-7033) – is the official quarterly journal of the Brazilian Society of Plant Breeding, abbreviated CROP BREED APPL BIOTECHNOL. It publishes original scientific articles, which contribute to the scientific and technological development of plant breeding and agriculture. Articles should be to do with basic and applied research on improvement of perennial and annual plants, within the fields of genetics, conservation of germplasm, biotechnology, genomics, cytogenetics, experimental statistics, seeds, food quality, biotic and abiotic stress, and correlated areas. The article must be unpublished. Simultaneous submitting to another periodical is ruled out. Authors are held solely responsible for the opinions and ideas expressed, which do not necessarily reflect the view of the Editorial board. However, the Editorial board reserves the right to suggest or ask for any modifications required. The journal adopts the Ithenticate software for identification of plagiarism. Complete or partial reproduction of articles is permitted, provided the source is cited. All content of the journal, except where identified, is licensed under a Creative Commons attribution-type BY. All articles are published free of charge. This is an open access journal.