Selection of progenies of wild radish germination under high temperatures/Selecao de progenies de nabo-forrageiro para germinacao sob altas temperaturas

Due to the expansion of the wild crop to regions with higher temperatures is important to develop cultivars adapted to high heat. The aim was to select tests for evaluating seed physiological quality of wild radish to estimating genetic characters in order to select cultivars adapted to high tempera...

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Bibliographic Details
Published in:Ciência rural 2014-02, Vol.44 (2), p.217
Main Authors: de Oliveira, Silvia Sanielle Costa, Ma, Cruz, Sihelio Julio Silva, da Silva, Carlos Jorge
Format: Article
Language:Spanish
Subjects:
Germination
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Summary:Due to the expansion of the wild crop to regions with higher temperatures is important to develop cultivars adapted to high heat. The aim was to select tests for evaluating seed physiological quality of wild radish to estimating genetic characters in order to select cultivars adapted to high temperature conditions. Hundred of half-brothers of wild radish were subjected to germination test and vigor (first count of germination, classification of seedling vigor, accelerated aging test, germination and testing of the first count at high temperature as well as seedling emergence in field. The germination test, first count test, accelerated aging and high germination test (20-35[degrees]C) can be used for the selection of wild radish crop populations adapted to germination and field emergence under high temperatures. Key words: genetic gain, heritability, Raphanus sativus, seeds, vigor. Devido a expansao da cultura do nabo-forrageiro para regioes com temperaturas mais elevadas, torna-se de importancia o desenvolvimento de cultivares adaptadas a altas temperaturas. Neste trabalho, o objetivo foi selecionar testes de avaliacao da qualidade fisiologica de sementes nabo-forrageiro que estimam caracteres geneticos, visando a selecionar genotipos adaptados a condicoes de alta temperatura. Para isso, sementes de 100 progenies de meio-irmaos de nabo-forrageiro foram submetidas a teste de germinacao e vigor (primeira contagem de germinacao, classificacao do vigor de plantulas, teste de envelhecimento acelerado, germinacao e teste da primeira contagem a altas temperaturas), bem como emergencia de plantulas em campo. O teste de primeira contagem, germinacao, envelhecimento acelerado, primeira contagem e germinacao em alta temperatura (20-35[degrees]C) sao recomendados para delinear estrategias de selecao de populacoes de nabo-forrageiro adaptados a germinacao e emergencia de plantulas em campo, em condicoes de altas temperaturas. Palavras-chave: ganho genetico, herdabilidade, Raphanus sativus, sementes, vigor.
ISSN:0103-8478