Produção de cachos e parâmetros genéticos de híbridos de caiaué com dendezeiro

Abstract

Resumo -O objetivo deste trabalho foi avaliar a produção de cachos e estimar os parâmetros genéticos de progênies F1 de caiaué (Elaeis oleifera) com dendezeiro (E. guineenses). As progênies foram plantadas em parcelas com número variável de plantas. Avaliaram-se número (NC), peso médio (PMC) e peso total de cachos (PTC) por planta, do sétimo ao décimo-terceiro ano após o plantio. Estes dados foram analisados por REML/BLUP em 59 progênies, com delineamento desbalanceado em linha e coluna. Todos os caracteres apresentaram considerável variabilidade, com coeficientes de variação genética entre 18,1 e 25,5%, quanto à progênie, e de 25,6 a 36,0% quanto a indivíduo. Pela seleção das cinco melhores progênies, podem ser obtidos ganhos superiores a 30%, para NC e PTC, e acima de 20% para PMC; e, com a seleção dos cinco melhores indivíduos, ganhos acima de 65%, para NC e PTC, e acima de 60% para PMC. As progênies apresentam alta variabilidade genética quanto à produção de cachos. Ganhos genéticos elevados podem ser obtidos pela seleção tanto de indivíduos para clonagem quanto de progênies para reprodução sexuada.Termos para indexação: Elaeis guineensis, Elaeis oleifera, palma de óleo africana, palma de óleo americana, REML/BLUP, repetibilidade, seleção simultânea. Bunch yield and genetic parameters of progenies between caiaué and African oil palmAbstract -The objective of this work was to evaluate the bunch yield and to estimate the genetic parameters of F1-progenies between caiaué (Elaeis oleifera) and African oil palm (E. guineenses). The progenies were planted in plots with a variable number of plants. The number of bunches (NB), average bunch weight (ABW), and fresh fruit-bunch yield (FFB) were evaluated, per plant, from the seventh to the thirteenth year after planting. These data were analyzed by REML/BLUP in 59 progenies, with a row-and-column unbalanced design. All characters showed a considerable genetic variability, with genetic variation coefficients between 18.1 and 25.5% for progenies, and 25.6 and 36.0% for individuals. Gains of more than 30%, for NB and FFB, and above 20% for ABW can be obtained selecting the five best progenies. By selecting the five best individuals, gains of more than 65% for NB and FFB, and above 60% for ABW, can be obtained. The progenies show a high-genetic variability for bunch yield. High-genetic gains can be obtained by selecting both for individuals, for clonal propagation, and for progenies, for seed propagation.

Breeding of Acrocomia aculeata using genetic diversity parameters and correlations to select accessions based on vegetative, phenological, and reproductive characteristics

“…Heritability values of 38, 36, and 45% were found in previous studies for the trait number of bunches in oil palm, açaí palm, and peach palm, respectively (Lopes et al, 2012;Farias Neto et al, 2008, 2013, consistent with the heritability value for TS found in the present study. In addition, Lopes et al (2012) reported a heritability value of 75% for the trait height of the first bunch, which is classified as high, as the value found for HFS.…”

“…In addition, Lopes et al (2012) reported a heritability value of 75% for the trait height of the first bunch, which is classified as high, as the value found for HFS.…”

Bunch yield of interspecific hybrids of American oil palm with oil palm in the juvenile phase

“…Similar results with high heritability in HIE OxG were presented by Gomes Junior et al (2014) and Lopes et al (2012), with higher heritability values among families than within families and with higher or equal heritability of MBW as the NB. High heritability estimates for NB (0.78), MBW (0.88) and TBY (0.70) were also reported by Okwuagwu et al (2008) for an oil palm population with wide genetic variability.…”

“…In the development of cultivars, genotypes with a very high MBW should be avoided, which can cause operational problems because the harvesting and manual loading of bunches is hampered, and the greater difficulty of industrial processing. Comparatively, Lopes et al (2012) reported a high positive correlation (0.52) between TBY and MBW and between TBY and NB (0.84) in HIE OxG, and almost zero between NB and MBW (0.06). High and positive correlations between NB and TBY (0.68 to 0.86) were found in oil palm populations evaluated by Okwuagwu et al (2008) and of 0.65 in a study of Okoye et al (2009).…”

“…Progeny RUB 1237 (Coari x La Mé) ranked 31 st . However, it must be Lopes et al (2012), the most productive adult HIE OxG trees, from the sixth year after planting, produced yields between 26.1 and 31.6 t ha -1 yr -1 of FFB. Oil palm production begins in the third year after planting, increasing gradually until the sixth/seventh year.…”