辣椒（Capsicum baccatum var. pendulum）对辣椒黄花叶病毒抗性的遗传

Inheritance of resistance to Pepper yellow mosaic virus in Capsicum baccatum var. pendulum.

作者信息

Bento C S, Rodrigues R, Gonçalves L S A, Oliveira H S, Santos M H, Pontes M C, Sudré C P

机构信息

Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brasil.

出版信息

Genet Mol Res. 2013 Apr 10;12(2):1074-82. doi: 10.4238/2013.April.10.3.

DOI:10.4238/2013.April.10.3

PMID:23661433

Abstract

We investigated inheritance of resistance to Pepper yellow mosaic virus (PepYMV) in Capsicum baccatum var. pendulum accessions UENF 1616 (susceptible) crossed with UENF 1732 (resistant). Plants from generations P1, P2, F1, F2, BC1:1, and BC1:2 were inoculated and the symptoms were evaluated for 25 days. Subsequently, an area under the disease progress curve was calculated and subjected to generation means analysis. Only the average and epistatic effects were significant. The broad and narrow sense heritability estimates were 35.52 and 21.79%, respectively. The estimate of the minimum number of genes that control resistance was 7, indicating that resistance is polygenic and complex. Thus, methods to produce segregant populations that advocate selection in more advanced generations would be the most appropriate to produce chili pepper cultivars resistant to PepYMV.

摘要

我们研究了辣椒（Capsicum baccatum var. pendulum）品种UENF 1616（感病）与UENF 1732（抗病）杂交后代对辣椒黄花叶病毒（PepYMV）抗性的遗传情况。对P1、P2、F1、F2、BC1:1和BC1:2代的植株进行接种，并在25天内评估症状。随后，计算病害进展曲线下的面积并进行世代均值分析。只有加性效应和上位性效应显著。广义遗传力和狭义遗传力估计值分别为35.52%和21.79%。控制抗性的最小基因数估计为7个，表明抗性是多基因且复杂的。因此，培育分离群体并在较晚世代进行选择的方法最适合用于培育抗PepYMV的辣椒品种。