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Plant height reduction in populations of triticale (X triticosecale Wittmack) by induced mutations and artificial crosses
Fábio PandiniI; Fernando Irajá Félix de CarvalhoII; José Fernandes Barbosa NetoII
IDepartamento de Plantas de Lavoura, UFRGS, Caixa Postal 776, 91512-970 Porto Alegre, RS, Brasil. Send correspondence to F.P.
IIProfessor do Departamento de Plantas de Lavoura, FA/UFRGS, Porto Alegre, RS, Brasil.
ABSTRACT
Induced mutations by gamma radiation (0, 5, 10, 20 and 40 kR doses) and reciprocal crosses were tested as mechanisms of enhancing genetic variability for plant height in two triticale cultivars, BR4 and EMBRAPA18. The reciprocal crosses and all doses of radiation showed similar increase in genetic amplitude for this trait, being suitable for increasing variability in breeding programs. Genotypes showed different responses as the gamma ray doses were increased, expressing shorter plant height. The decision of using induced mutations or artificial crosses depends on the resources available and the selection method to be used.
Keywords: height; triticale; induced mutations; artificial crosses.
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