Phenotypic and genetic characterization of partial resistance to crown rust in Avena sativa L.

被引：9

作者：

Zambonato, Felipe ^{[1
]}

Federizzi, Luiz Carlos ^{[1
]}

Pacheco, Marcelo Teixeira ^{[1
]}

de Arruda, Marcio Pais ^{[1
]}

Martinelli, Jose Antonio ^{[1
]}

机构：

[1] Fed Univ Rio Grande Sul UFRGS, Dept Crop Sci, Agron Sch, BR-91501970 Porto Alegre, RS, Brazil

来源：

CROP BREEDING AND APPLIED BIOTECHNOLOGY | 2012年 / 12卷 / 04期

关键词：

Puccinia coronata avenae; oat; inheritance; adult plant resistance; F-SP AVENAE; PUCCINIA-CORONATA; OAT; VARIABILITY; INHERITANCE; VIRULENCE;

D O I：

10.1590/S1984-70332012000400005

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Crown rust is a major oat disease. Partial resistance is a promising option for disease control for being potentially more durable than complete resistance. The objective of this study was to investigate the inheritance of partial resistance to crown rust in oat populations that were derived from a cross between cultivar URS 21 (partially resistant) and URS 22 (susceptible). In 2010, the six basic generations (P-1, P-2, F-1, F-2, BC1, and BC2) were sown in the field, and resistance to crown rust was assessed using the area under the disease progress curve, normalized and corrected for each individual plant. The inheritance of the trait partial resistance was oligogenic, indicating the presence of genes with both major and minor phenotypic effects. Additive and dominance effects were important to determine the partial resistance and the heritability estimates were high, indicating the possibility of selection for resistance in early generations.

引用

页码：261 / 267

页数：7

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