西瓜抗枯萎性的遗传研究

IF 1.2 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY Bragantia Pub Date : 2022-01-01 DOI:10.1590/1678-4499.20210068
F. D. S. Cunha, A. F. D. Costa, K. M. G. D. Araújo, I. S. L. Lima Neto, A. S. Capucho, F. H. Ishikawa
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引用次数: 1

摘要

本研究旨在寻找西瓜抗湿性的来源,确定西瓜抗湿性的遗传。首先,对72份西瓜材料接种枯丝核菌CMM 1053。只有两个品种(BGH 29和BGH 76)被认为对该病具有中度抗性。对BGH-29植株进行无症状接种,经鉴定为抗性植株进行自交受精,并使用自交系s1进行杂交。以敏感品种深红甜与自交系BGH-29杂交和回交的分离群体接种后,评价了对茄蚜的反应。在8个西瓜S1系中接种6个不同菌株,采用Griffing方法进行部分双列分析,获得一般抗性(GRA)、一般攻击能力(GAA)和特定互作能力(SIA)。根据亲本F 1、F 2、BC 1 (f1 × p1)和BC 2 (f1 × p2)的易感和抗性评分,抗潮性至少有9个基因具有加性效应,遗传力较低,表明多基因遗传。双列分析结果与分离群体分析结果一致,表明抗性遗传为水平遗传,GRA变异占变异平方和的46.1%,而SIA变异仅占变异平方和的20.39%。本文首次报道了西瓜抗枯萎病的遗传。
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Inheritance of resistance to damping-off (Rhizoctonia solani) in watermelon
: This study aimed to find sources of resistance to damping-off and to determine the inheritance of resistance in watermelon. Firstly, 72 watermelon accessions were inoculated with CMM 1053 isolate of Rhizoctonia solani . Only two accessions (BGH 29 and BGH 76) were considered moderately resistant to the disease. The inoculated plants without symptoms from accession BGH-29 identified as resistant were self-fertilized and the inbred line S 1 was used for the crosses. The reaction to R. solani after inoculation of the segregating populations of the cross and backcrosses between susceptible cultivar Crimson Sweet and the inbred line BGH-29 was evaluated. In other experiment eight S1 lines of watermelon were inoculated with six different isolates of R. solani and the reaction was evaluated by partial diallel analysis using the Griffing’s method IV to obtain estimates of general resistance ability (GRA), general aggressiveness ability (GAA), and specific interaction ability (SIA). According to ratings of the susceptible and resistant parents, generations F 1 , F 2 , BC 1 (F 1 × P 1 ) and BC 2 (F 1 × P 2 ), resistance to damping-off was conferred by at least nine genes with additive effect and low heritability which indicates polygenic inheritance. The results of the diallel analysis corroborate with the analysis of segregating population, indicating inheritance of resistance was horizontal, since 46.1% of the total sum of squares of the variation observed in the crosses was due to GRA, while the SIA corresponded to only 20.39% of variation. This is the first report about inheritance of resistance to damping-off caused by R. solani in watermelon.
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来源期刊
Bragantia
Bragantia AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
2.40
自引率
8.30%
发文量
33
审稿时长
4 weeks
期刊介绍: Bragantia é uma revista de ciências agronômicas editada pelo Instituto Agronômico da Agência Paulista de Tecnologia dos Agronegócios, da Secretaria de Agricultura e Abastecimento do Estado de São Paulo, com o objetivo de publicar trabalhos científicos originais que contribuam para o desenvolvimento das ciências agronômicas. A revista é publicada desde 1941, tornando-se semestral em 1984, quadrimestral em 2001 e trimestral em 2005. É filiada à Associação Brasileira de Editores Científicos (ABEC).
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