Genetic diversity of rice genotypes from Brazil based on their resistance to Pratylenchus zeae

Autor:	Simone de Melo Santana-Gomes, Michelly Ragazzi Cardoso, Andressa Cristina Zamboni Machado, Isabela Hernandes, Fabio Biela, Claudia Regina Dias-Arieira, Heriksen Higashi Puerari
Rok vydání:	2015
Předmět:	Genetic diversity Oryza sativa biology media_common.quotation_subject fungi food and beverages Sowing Heritability biology.organism_classification Population density Agronomy Germination Pratylenchus zeae Reproduction media_common
Zdroj:	Tropical Plant Pathology. 40:208-211
ISSN:	1983-2052
DOI:	10.1007/s40858-015-0031-y
Popis:	A greenhouse study using naturally infested soil was conducted to evaluate the susceptibility of rice genotypes to Pratylenchus zeae and the broad-sense heritability of host resistance. Twenty-six rice genotypes were evaluated and maize ‘BRAS 3010’ and pearl millet ‘AMN 17’ were used as susceptible checks. Two variables, initial and final population densities and reproduction factor of P. zeae, were measured before sowing and 90 days after seed germination. The genotypes varied significantly in susceptibility to P. zeae. Heritability levels as high as 77.2 and 68 % for the reproduction factor and the number of nematodes per gram of roots, respectively, suggested that breeding rice for P. zeae resistance is difficult due to large environmental effects on the phenotypic expression of resistance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::eff9d6526bd7039ca599a4db4a96abd8 https://doi.org/10.1007/s40858-015-0031-y Zobrazit plný text záznamu Full text from SpringerLink