Genetic variation under conditions of thermal stress: searching for evidences of evolutionary adaptability in the plant pathogenic fungus Rhizoctonia solani AG-1 IA

• Grant number: 10/15704-5
• Support Opportunities: Regular Research Grants
• Duration: January 01, 2011 - December 31, 2012
• Field of knowledge: Agronomical Sciences - Agronomy - Plant Health
• Principal Investigator: Paulo Cezar Ceresini
• Grantee: Paulo Cezar Ceresini
• Host Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil

Abstract

Stress due to environmental changes can impact the genetic architecture of quantitative traits through changes in genetic and environmental variances. It is expected that stress can increase the genetic variation for quantitative traits. Based on a series of theoretical predictions in this study we will test the hypothesis that an increase in average temperature (as anticipated for the scenario of climate change) may increase the genetic variation for quantitative traits in the plant pathogenic fungus Rhizoctonia solani anastomosis group AG- 1 IA from soybean. This is the same as testing whether an increase in temperature beyond the optimum temperature for growth, would result in increased broad-sense genetic variance (Vg). Our specific interest is to test the effect of temperature stress on genetic variation for resistance to a broad range fungicide. Our expectation is that populations of fungi under continuous stress of temperature have evolutionary potential to move toward a high degree of resistance to fungicide. We will examine the genetic variation of three Brazilian populations of R. solani AG-1 IA for in vitro mycelial growth and for production of resistance structures (sclerotia) under two temperature regimes (optimal and above optimal), and under three different concentrations of fungicide for broad spectrum control (no fungicide, low and high concentration). These populations are distributed in a cline in temperature from the central-west to northern Brazil. Finally, we will also observe whether there are significant differences between the three geographical populations studied and if there is a pattern of adaptability to temperature following the cline: MT06

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

LINA MARIA RAMOS-MOLINA; PAULO CEZAR CERESINI; SAMARA NUNES CAMPOS VICENTINI; DANILO AUGUSTO DOS SANTOS PEREIRA; GRACE INGRID CONCEIÇÃO; MARÍA DEL ROSARIO SILVA-HERRERA; PEDRO CÉSAR DOS SANTOS. Potencial adaptativo de populações de Rhizoctonia solani AG-1 IA associadas ao arroz e à Urochloa brizantha ao estresse térmico. Summa Phytopathologica, v. 45, n. 3, p. 320-325, 2019-10-14. (10/15704-5, 13/11944-0)

FERRO, CAMILA GEOVANA; SILVA, TATIANE CARLA; CAMPOS VICENTINI, SAMARA NUNES; FERRANDO, GUILHERME MORAES; CERESINI, PAULO CEZAR. LEVELS OF REGIONAL PHENOTYPIC ADAPTATION (Q(ST)) INDICATE THAT NEUTRALITY HAS SHAPED THE POPULATION STRUCTURE OF THE SOYBEAN-INFECTING PATHOGEN Rhizoctonia solani AG-1 IA. REVISTA CAATINGA, v. 33, n. 3, p. 608-618, JUL-SEP 2020. (10/15704-5)

CAMILA GEOVANA FERRO; TATIANE CARLA SILVA; SAMARA NUNES CAMPOS VICENTINI; GUILHERME MORAES FERRAUDO; PAULO CEZAR CERESINI. NÍVEIS DE ADAPTAÇÃO FENOTÍPICA REGIONAL (QST) INDICAM QUE A NEUTRALIDADE MOLDOU A ESTRUTURA DE POPULAÇÕES DE Rhizoctonia solani AG-1 IA DA SOJA. Rev. Caatinga, v. 33, n. 3, p. 608-618, 2020-09-07. (10/15704-5)