Response of promising lines of rice in Los Palacios municipality, Cuba
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Abstract
The trial was carried out on a farm belonging to the Credit and Service Cooperative Abel Santamaría in Los Palacios municipality. The analyzed plant material consisted of six rice genotypes, four new advanced lines obtained through the hybridization method and the commercial cultivars INCA LP-5 of short cycle and INCA LP-7 of medium cycle. A completely randomized design consisting of six treatments with three replicates each was used and 11 qualitative and nine quantitative traits were evaluated. The data obtained were processed by simple rank analysis of variance (ANOVA) and the means were decimated by Duncan's Multiple Range Test at 5 %. For qualitative traits, the results showed that all genotypes were characterized by erect growth habit, lack of anthocyanin pigmentation, cleft-type ligule, absence of ridges, and resistance to lodging and straw color of the paddy grain. Among the new genotypes, lines 3 and 4 showed the longest leaves and panicles, a good performance of full grains per panicle and grain mass, as well as a low number of empty grains, in addition to the best values in the characters panicles per square meter and yield, respectively. Line 2 presented the shortest cycle and showed high values of panicles per square meter and yield. The systematic study of genetic diversity analysis is essential to take full advantage of the inherent variability and broaden the genetic base of rice cultivars.
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