Distribution of "mating type" and sexual compatibility of Pyricularia oryzae, causal agent of blast, of oats, barley, triticale, and wheat.

• Grant number: 17/18587-9
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: November 01, 2017
• End date: October 31, 2018
• Field of knowledge: Agronomical Sciences - Agronomy - Plant Health
• Principal Investigator: Alfredo Seiiti Urashima
• Grantee: Kézia Cristina da Silva Reis
• Host Institution: Centro de Ciências Agrárias (CCA). Universidade Federal de São Carlos (UFSCAR). Araras , SP, Brazil

Abstract

Blast is one major disease on all winter crops grown in Brazil. Wheat was the first host, succeeded by triticale, rye, barley, black oat and white oat. These diseases have called attention of the international scientific community because they had never been reported in nature as well as by the magnitude of the yield losses on all these cereals. Varietal resistance is the most recommended means to control blast diseases. Nevertheless, its efficacy is directed related to pathogen diversity, which in turn, is dependent on sexual recombination, known to be the main factor of the high variability of P. oryzae from rice and wheat. The first requirement to examine occurrence of sexual recombination in P. oryzae is the distribution of mating type alleles, and then, fertility and presence of hermaphrodite isolates. This sort of information is paramount for the success of blast disease control but has not been investigated in P. oryzae of barley, oat, and triticale; on wheat the information is contradictory. Sexual compatibility among blast pathogen from these cereals is absent. Therefore, the presente work aims to examine mating type distribution and sexual compatibility amog of P. oryzae from oat, barley, triticale, and wheat. Palavras-chave: Magnaporthe, variability, recombination, cross-compatibility

Scientific publications

(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)

OLIVEIRA, M.; REIS, K.; URASHIMA, A. SEIITI. Sexual characterization of Magnaporthe oryzae populations associated with winter crops. PHYTOPATHOLOGY, v. 109, n. 10, p. 1-pg., 2019-10-01. (17/18587-9)