Authors
Advisor(s)
Abstract(s)
The present work had as objective to determine the duration of the cycle vegetative and to evaluate the susceptibility to rice blast disease of 19 rice advanced lines resulting from the improvement works performed by INIAV,I.P. in collaboration with the COTArroz, in “Salvaterra de Magos” and 12 commercial varieties. The susceptibility was determined under field conditions and greenhouse inoculation studies, having been used five isolated of Magnaporthe grisea of the Portuguese population of the pathogen and one isolated of reference of the Japanese population (JP 56 ).
The beginning of tillering of the advanced lines and the varieties occurred between 19 and 29 days after sowing, the booting between 74 and 84 days and heading between 80 and 92 days. The duration of the vegetative cycle varied between 121 days and 140 days, having the majority of the studied advanced lines presented cycle greater than 130 days.
In field test 60% of the advanced lines and 58% of commercial varieties were susceptible to leaf or panicle blast, having the advanced lines OP 1227 and OP 1229 and the commercial varieties “Ariete” and “Dardo” been most susceptible to leaf blast.
In the study of inoculation 15.8% of the advanced lines presented susceptibility to all isolates, while no commercial variety presented susceptibility to all isolates.
Description
Mestrado em Engenharia Agronómica - Proteção de Plantas - Instituto Superior de Agronomia
Keywords
Pyricularia grisea Magnaporthe grisea stages of the vegetative cycle rice inoculation
Pedagogical Context
Citation
Ferreira, S.M.M. - Estudo do ciclo vegetativo e da suscetibilidade à piriculariose de linhas avançadas e variedades comerciais de arroz. Lisboa: ISA, 2013, 88 p.