Genetic variability and progeny selection of peach palm via mixed models (REML / BLUP)
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Universidade Estadual de Maringá
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Heart of palm harvesting and exploitation has reduced the natural reserves of açaí and juçara; hence, the peach palm is an excellent option as source of heart of palm that can reduce the pressure on these two species. The peach palm has high tillering and no post-harvest oxidation. An experiment in a randomized block design with 72 pr ogenies of peach palm, 36 replications and a single tree plot was performed for five years at the experimental field of Embrapa in the Western Amazon. Genetic parameters were estimated using two mixed models, one based on progeny means and the second on joint information from crops. A repeatability analysis, genotype sele ction, and progeny selection were performed; the Mulamba and Mock selection index was determined; an d Tocher’s clustering method was applied. The repeatability analysis revealed the existence of gene tic variability, low repeatability, which ranged from 0.3307 to 0.6698 for five years. The analysis performed thro ugh the progeny means showed a heritability that varied from 51% to 23% for in all variables; th e clustering revealed two groups. The progeny selection should be the main selection strate gy, and crosses of superior progenie s of different groups should be emphasized.
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