Resumo

DIAZ SOLIS, Sandra H; MOREJON RIVERA, Rogelio; ONICKA CHISHOLM, Odania  e  CASTRO ALVAREZ, Rodolfo. Evaluation of new rice (Oryza sativa L.) lines obtained by hybridizations inside Genetic Improvement Program of this crop in Cuba. cultrop [online]. 2015, vol.36, n.3, pp. 115-123. ISSN 1819-4087.

The research was conducted to evaluate the behavior of new rice lines (Oryza sativa L.) obtained by hybridization with the aim of increase yields and crop genetic diversity. fifthteen lines were studied from different hybrid combinations and two cultivars used as test and also as progenitors which were involved in some of the originated lines crossing. twenty two characters were considered, qualitative and quantitative one, which were measured in the stages of flowering, ripening and post-harvest of the crop, using a Completely Randomized design with five replications. The data obtained were subjected to univariate and multivariate statistical analyzes. The lines evaluated were similar in some qualitative characters and different in all quantitative characters; also it was possible to determine the most important variables for the characterization. The lines G/S-L1, G/S-L10, G/S-L13 that make up the group I were the best behavior, combining good plant erection, well emerged panicles, late or intermediate senescence and higher yield, beating the test used

Palavras-chave : rice; germplasm; hybridization; descriptors; yield.

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