Genetic variation of germination cold tolerance in Japanese rice germplasm


Autoria(s): Bosetti, Fátima; Montebelli, Camila; Novembre, Ana Dionisia da Luz Coelho; Chamma, Helena Maria Carmignani Pescarin; Pinheiro, José Baldin
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

23/10/2013

23/10/2013

2012

Resumo

Low temperatures at the initial stages of rice development prevent fast germination and seedling establishment and may cause significant productivity losses. In order to develop rice cultivars exhibiting cold tolerance, it is necessary to investigate genetic resources, providing basic knowledge to allow the introduction of genes involved in low temperature germination ability from accessions into elite cultivars. Japanese rice accessions were evaluated at the germination under two conditions: 13 degrees C for 28 days (cold stress) and 28 degrees C for seven days (optimal temperature). The traits studied were coleoptile and radicle length under optimal temperature, coleoptile and radicle length under cold and percentage of the reduction in coleptile and radicle length due to low temperature. Among the accessions studied, genetic variation for traits related to germination under low temperatures was observed and accessions exhibiting adequate performance for all investigated traits were identified. The use of multivariate analysis allowed the identification of the genotypes displaying cold tolerance by smaller reductions in coleoptile and radicle lenght in the presence of cold and high vigour, by higher coleoptile and radicle growth under cold.

Conselho Nacional de Pesquisa e Desenvolvimento Tecnologico (CNPq)

Conselho Nacional de Pesquisa e Desenvolvimento Tecnologico-CNPq

Pioneer Hi-Bred International

Pioneer HiBred International

Fundaeao de Amparo a Pesquisa do Estado de Sao Paulo-FAPESP [2007/06615-6]

Fundaeao de Amparo a Pesquisa do Estado de Sao PauloFAPESP

Identificador

BREEDING SCIENCE, TOKYO, v. 62, n. 3, supl. 1, Part 1, pp. 209-215, SEP, 2012

1344-7610

http://www.producao.usp.br/handle/BDPI/35611

10.1270/jsbbs.62.209

http://dx.doi.org/10.1270/jsbbs.62.209

Idioma(s)

eng

Publicador

JAPANESE SOC BREEDING

TOKYO

Relação

BREEDING SCIENCE

Direitos

closedAccess

Copyright JAPANESE SOC BREEDING

Palavras-Chave #COLD TOLERANCE #RICE #GERMPLASM #GENETIC VARIATION #GERMINATION #LOW TEMPERATURE #ORYZA-SATIVA L. #LOW-TEMPERATURE GERMINABILITY #STAGE #INHERITANCE #CULTIVARS #GROWTH #AGRONOMY #PLANT SCIENCES
Tipo

article

original article

publishedVersion