Resumo

RIASCOS DELGADO, Marcela Elizabeth  e  CHECA CORAL, Oscar Eduardo. EVALUATION AND SELECTION OF PEA LINES WITH AFILA GENE IN TWO PLANTING DENSITIES. rev.udcaactual.divulg.cient. [online]. 2018, vol.21, n.2, pp.367-376. ISSN 0123-4226.  https://doi.org/10.31910/rudca.v21.n2.2018.984.

Nariño is the principal pea producer in Colombia, given its position in the use of improved varieties and trellis system. However, these genotypes have difficult agronomic managements, because their aggressive growth, which increases production costs. As alternative, the group of investigation Cultivos Andinos (Gricand), developed a process of introduction afila (af) gene in the pea varieties Andina, San Isidro and Sindamanoy, replacing lateral leaves by tendrils, to get a better grip of plants. The lines afila resulted were evaluation in three experimental phases. In the first phase, 208 family F3 were selection and generated 105 lines F4. In following cycle, the lines selected were evaluated for yield components and applying a selection index, 21 lines promising for merit order were selected. Subsequently, these lines were evaluated in two planting densities (D1: 83.333 and D2: 166,666 plantas·ha-1), used a splits plot design. The main plot with the densities and the subplot the pea genotypes. In the planting density D2, the line SXDRC118 had higher yield than the controls, with a gain between 75 and 211%; furthermore, it surpassed with 66% the other lines. SX3568RC17 showed a higher average yield than San Isidro and Sindamanoy, respectively, 86 and 188% and SX3575RC18, SX3575RC1X1 and SX3575RC19 regarding Sindamanoy with 138 to 157%. This indicates that some lines with af gene have potential for higher yield than commercial varieties with normal leaves when planted at higher density.

Palavras-chave : tendrils; backcross; genotypes; selection; yield.

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