Seleção precoce intensiva: uma nova estratégia para o programa de melhoramento genético do cajueiro

Cavalcanti, José Jaime Vasconcelos; Resende, Marcos Deon Vilela de

doi:10.1590/s0100-29452010000400043

Cited by 4 publications

(3 citation statements)

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“…In studies evaluating intensive early selection, which consists of plant densities higher than traditional practices, Cavalcanti and Resende (2010) report that early selection was carried out for traits of high heritability, such as mean fruit weight, in the first two years of age of the plants, and the efficiency and feasibility of the method were observed. In this context, the genotypes evaluated could be exploited, both for heterosis and for intensive early selection in the traits measured with high values of heritability.…”

Section: Resultsmentioning

confidence: 99%

Selection of common cashew tree genotypes in commercial growing areas in municipalities of Piauí, Brazil

Filho

Nunes

Lopes

et al. 2019

Crop Breed. Appl. Biotechnol.

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The aim of this study was to estimate genetic parameters and to select promising common cashew tree genotypes in commercial growing areas in four environments in Piauí (Piracuruca-P, Barro Duro-B, Teresina-T, and Ipiranga do Piauí-I) using the mixed model approach. Genetic variances were significant for most of agromorphological and physicochemical traits of the cashew nut and accessory fruit. The physicochemical traits exhibited more genetic variability and less environmental influence. The genetic correlations among traits were significant, positive, and of medium to high magnitude, except for titratable acidity and total soluble solids. The prominent genotypes for the agromorphological traits were 115(I), 110(I), 92(T), 38(P), 108(I), and 103(I); for titratable acidity, 31(P), 118(I), and 74(B); for total soluble solids, 124(I) and 112(I); and for total soluble solids/titratable acidity, 109(I) and 47(P). The selected genotype 115(I) exhibited superior performance for most of the traits.

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Section: Resultsmentioning

confidence: 99%

Selection of common cashew tree genotypes in commercial growing areas in municipalities of Piauí, Brazil

Filho

Nunes

Lopes

et al. 2019

Crop Breed. Appl. Biotechnol.

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“…Esta evaluación fue practicada en la parcela motivo del presente artículo. (Pinedo y Paredes, 2011) Cavalcanti y Resende (2010), practicaron una selección precoz intensiva en el mejoramiento del casho con una densidad de plantación cuatro veces mayor que la tradicional y una selección precoz para caracteres de alta heredabilidad (peso de almendra, resistencia a enfermedades) en los dos primeros años de edad de las plantas. Para una conclusión del proceso selectivo, en función de los caracteres de baja heredabilidad (rendimiento por ejemplo), que requieren de un mayor periodo de evaluación, la selección continúa hasta cuatro años.…”

Section: Introductionunclassified

SELECCIÓN TEMPRANA DE PLANTAS DE (Myrciaria dubia H.B.K Mc Vaugh) CAMUCAMU, EN UN ENSAYO DE PROGENIES DE POLINIZACION ABIERTA

et al. 2014

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RESUMENEl IIAP, en alianza con el INIA, viene desarrollando un plan de mejoramiento y producción de semilla mejorada del camu-camu (Myrciaria dubia H.B.K Mc Vaugh). Se están evaluando colecciones básicas y pruebas genéticas, con el fin de seleccionar las plantas superiores de acuerdo a caracteres prioritarios como: precocidad, peso de fruto y contenido de ácido ascórbico. En el 2007 se llevó a cabo el ensayo de 108 progenies precoces, bajo un diseño de bloque completo aleatorizado, con 4 repeticiones y 3 plantas medias hermanas por unidad experimental. Por su precocidad y rendimiento de fruta, en un análisis acumulativo de largo plazo (2007)(2008)(2009)(2010)(2011)(2012), se vienen seleccionando las plantas a nivel de progenies e individuos. En el 2013 se realizaron pruebas de heredabilidad en el sentido estricto, haciendo uso del software genético SELEGEM REML-BLUP, además se ha realizado el análisis de varianza (Inter-Intra-grupos, ONEWAY-SPSS), para los caracteres número de fruto/planta, porcentaje de frutos atacados, peso promedio de fruto y rendimiento de fruto. Según el peso de fruto se han seleccionado las plantas: 42-2, 117-1, 89-5, 112-7. 222-3, 21-12, 19-9, 114-11, 206- EARLY SELECTION OF CAMU-CAMU (Myrciaria dubia HBK Mc Vaugh) PLANTS, IN A OPEN POLLINATED PROGENIES TEST ABSTRACTThe Research Institute of the Peruvian Amazon-IIAP, in partnership with the National Institute of Agrarian Innovation, is developing a improvement and seed production of camu-camu program. They are evaluating various core collections and genetic testing, in order to select the superior plants according to priority characters as earliness, fruit weight and ascorbic acid content. In 2007 the 108 early progeny test was intalled under a randomized complete block design with 4 replications and 3 half sisters plants, per experimental unit . For his precocity and fruit yield, in a cumulative analysis of long-term (2007-2012) will come at selecting progeny plants and individuals. In 2013, heritability tests in the narrow sense were performed, using genetic selection software REML-BLUP SELEGEM. Also has made the analysis of variance (Inter-Intra-groups ONEWAY-SPSS) for characters "number of fruit / plant," percentage of attacked fruits, average fruit weight and fruit yield. "The selection presented is the result of a dynamic analysis in three harvests. Depending on the weight of fruit plants have been selected: 42-2, 117-1, [10][11][12] 71-1 and 222-1 . For attack tolerance Conotrachelus dubiae (weevil fruit) plants were selected: 51-2, 164-3, 220-10, 10-12. 98-1, 191-2, 229-3, 85-11, 222-1 and 249-3. In short get selected 28 plants belonging to 25 progenies, among which stand out for fruit yield and tolerance to weevil fruit plants: 10-12, 98-1, 222-1, 229-3 and 249-3.

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“…O desenvolvimento de clones-elite por meio de hibridações artificiais entre cajueiro-anão-precoce e cajueiro comum, seguida da caracterização e seleção de plantas superiores dentro das progênies, é uma importante estratégia para a ampliação da variabilidade e a obtenção de ganhos genéticos nesta cultura (CAVALCANTI et al, 2000). Até então, a grande maioria dos clones comerciais de cajueiro lançados é produto da seleção fenotípica em populações naturais ou melhoradas (populações de meios-irmãos), com a ausência de controle parental ou conhecimento apenas dos genitores femininos (CAVALCANTI et al, 2010).…”

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Desempenho de híbridos de cajueiro-anão-precoce no litoral do estado do Ceará

et al. 2014

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resumo -A seleção de genótipos de cajueiro em progênies segregantes obtidas via hibridações artificiais representa em uma oportunidade de associação de genes favoráveis, herdados de genitores conhecidos. Adicionalmente, conhecer a dinâmica dos principais caracteres de interesse pode auxiliar na definição de estratégias eficientes para a obtenção de ganhos genéticos. Logo, o objetivo do trabalho foi avaliar o desempenho produtivo e caracteres morfológicos de progênies de irmãos completos de cajueiro, conduzidas no município de Pacajus-CE, ao longo de três safras de cultivo, e estimar as correlações entre os caracteres de interesse. Nas safras de 2010, 2011 e 2012, foram avaliadas sete progênies de cajueiro em relação a caracteres morfológicos e produtivos. Os cruzamentos CCP 76 x BRS 226, CCP 76 x Embrapa 51 e BRS 226 x Embrapa 51 mostraram-se promissores na geração de genótipos superiores para caracteres de interesse agronômico. O porte da planta apresentou associações positivas com a produtividade de castanhas, e o número de castanhas por planta evidenciou forte correlação com a produtividade. Portanto, ressalta-se a necessidade de realizar a seleção buscando o equilíbrio em relação ao desempenho nos caracteres morfológicos e produtivos, visando à obtenção de genótipos que associem a elevada produtividade de castanhas e adequado porte de planta. termos para indexação: Anacardium occidentale L., progênies, desempenho agronômico.performance of hYBrid of precocious dwarf cashew on the coast of the state of cearÁ aBstract -The selection of cashew genotypes in segregating progenies obtained via artificial hybridization consists of a chance to associate favorable genes inherited from known parents. Additionally, knowing the dynamics of the main characters of interest can help define effective strategies to obtain genetic gains. So, the objective of this study was to evaluate the performance of cashew full-sib progenies in relation to production and morphological characters, cultivated in the municipality of Pacajus-CE in three growing seasons, and to estimate the correlations among traits of interest. In the seasons of 2010, 2011 and 2012 were evaluated seven progenies of cashew in relation to morphological and productive characters. The crosses CCP 76 x BRS 226, CCP 76 x Embrapa 51 and BRS 226 x Embrapa 51 shown to be promising in generating superior genotypes for agronomic interest characters. The size of the plant showed positive associations with productivity of nuts, and the number of nuts per plant showed strong correlation with yield. So, it is important to emphasize the necessity to perform the selection seeking balance in relation to the performance on morphological and productive characters in order to obtain genotypes that combine high productivity of nuts and appropriate size of plant. index terms: Anacardium occidentale L., progeny, agronomic performance.

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Seleção precoce intensiva: uma nova estratégia para o programa de melhoramento genético do cajueiro

Cited by 4 publications

References 2 publications

Selection of common cashew tree genotypes in commercial growing areas in municipalities of Piauí, Brazil

Selection of common cashew tree genotypes in commercial growing areas in municipalities of Piauí, Brazil

SELECCIÓN TEMPRANA DE PLANTAS DE (Myrciaria dubia H.B.K Mc Vaugh) CAMUCAMU, EN UN ENSAYO DE PROGENIES DE POLINIZACION ABIERTA

Desempenho de híbridos de cajueiro-anão-precoce no litoral do estado do Ceará

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