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ABSTRACT:The oil palm crop has expanded significantly in the state of Pará, which has not been followed in a proportional manner by studies aiming at increasing yield through plant nutrition. The objective of this study was to evaluate general and specific norms of the Diagnosis and Recommendation Integrated System (DRIS) for genetic materials of oil palm (African and interspecific hybrid) at two ages (young and adult plants) and evaluate possible deficiencies in fertilization and soil correction practices. The DRIS norms were composed of means, standard deviations, and coefficients of variation of bivariate, specific, and general relationships among nutrients of 144 leaf samples. The DRIS norms specific for genetic material did not differ from the general norms; however, a large number of differences were found between specific bivariate relationships for age groups, among themselves, and in relation to the general norms. The regression analysis between the nutritional balance index and yield were better explained when age groups were discriminated. In the young plants, the number of cases of stands with deficiencies followed the order Ca > Fe > B > S > Mn > K > Mg = Cu > Zn > N > P; and for adults, this order was Ca > Mn > Zn > Fe > S = B > N = Cu > K > Mg > P. The DRIS norms can be utilized in diagnostics regardless of genetic material; however, they must be specified for the age of the plant. Most of the stands showed deficiency in Ca and micronutrients, coinciding with the least used nutrients in oil palm crops in the state of Pará, as well as emphasizing the need for soil liming.

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PALAVRAS-CHAVE Elaeis guineenses Elaeis oleífera Palma de óleo REML/BLUP KEYWORDS Elaeis guineenses Elaeis oleíferaOil palm REML/BLUP RESUMO: Híbridos interespecífi cos entre o caiaué e o dendezeiro (HIE OxG) são resistentes ao amarelecimento fatal (AF), principal problema fi tossanitário da dendeicultura. Embora já existam cultivares de HIE OxG recomendadas para o plantio, o melhoramento genético desse tipo de material ainda está em fase inicial, de modo que existe a possibilidade de altos ganhos com seleção. Neste estudo, foram avaliadas características vegetativas na fase juvenil de 42 progênies de HIE OxG em área de incidência do AF. As progênies foram obtidas a partir de cruzamentos de genitores de caiaué das origens Manicoré, Manicoré x São Bartolomeu e Coari e dendezeiro do tipo pisífera da origem La Mé. Três experimentos com 16 progênies, sendo três comuns aos três experimentos, foram estabelecidos no delineamento blocos casualizados com quatro repetições e 12 plantas por parcela. As avaliações foram realizadas dos 42 aos 79 meses de idade, com periodicidade de 6 a 16 meses. Para todas as características, foi observada baixa variabilidade genética, com valores de coefi ciente de variação genético entre 1,5 e 5,2%. As herdabilidades foram baixas (0,03 a 0,199), com exceção da emissão foliar que foi moderada (0,215). A seleção das cinco melhores progênies, segundo RML/BLUP, promoveria redução de 7,4% na altura da planta, 4,5% no comprimento da ráquis, 5,6% no comprimento da folha, 4,9% no comprimento do folíolo, 5,6% no número de folíolos e ganho de 7,1% na emissão foliar. Os resultados indicam baixa expectativa de ganhos com seleção para características vegetativas nas progênies estudadas. ABSCTRACT: Interspecifi c hybrids between caiaué and oil palm (HIE

The objective of this work was to estimate selection gains for bunch production in hybrids obtained from “caiaué” (Elaeis oleifera) parents from the Manicoré population and oil palm (Elaeis guineensis) parents from the La Mé population, from the third to the eighth year after planting. Thirty-nine full-sibling progenies were evaluated in experiments conducted in a randomized complete block design, with four replicates and 12 plants per plot. The genetic gain estimates were 27.6% for the ten best selected F1 individuals, 13.7% for the four best selected progenies from parents of both sexes, 6.4% for the selected progenies of the five best male parents, 6.0% for the selected progenies of the two best families from male parents, and 4.0% for the selected progenies of the best descendants from male parents. Genetic gains for bunch production can be achieved, in the short term, through selection restricted to male parents, and, in the medium term, through selection of both male and female parents and cloning of F1 individuals.