Estimation of genetic parameters and verification of early selection efficiency in baru (Dipteryx alata)

Santos, Alisson Moura; Rosado, Sebastião Carlos da Silva; Oliveira, Adelson Nascimento

doi:10.1590/1984-70332014v14n4a37

Cited by 9 publications

(6 citation statements)

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“…Zaruma (2014) também encontrou valor inferior a 10% para DAP em progê-nies de D. alata com 9 anos de idade. Assim como Santos et al (2014b); Gomes (2011), em indiví-duos da mesma espécie aos 11,5 e 11 anos, respectivamente.…”

Section: Resultsunclassified

Variação genética em caracteres de crescimento em progênies de Dipteryx alata Vog.

Pagliarini¹,

Konrad²,

Silva³

et al. 2016

Sci. For.

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ResumoO objetivo desse trabalho foi estimar a variação genética entre e dentro de progênies de Dipteryx alata, com a finalidade de realizar um desbaste seletivo, visando estabelecer um pomar de sementes por mudas com variabilidade e qualidade genética. O ensaio foi instalado em dezembro de 1986, na Estação Experimental de Pederneiras, no Florestal Estadual de São Paulo, seguindo-se o delineamento de blocos ao acaso, com 25 progênies, cinco repetições e cinco plantas por parcela. O espaçamento utilizado foi o de 3 x 3 m. O teste de progênies foi avaliado aos 25 anos para os caracteres: altura total, diâmetro à altura do peito (DAP), volume real, bifurcação e sobrevivência. Foram realizadas análises de deviance para determinar a variação genética entre e dentro de progênies para os caracteres. As estimativas de componentes de variância e parâmetros genéticos foram obtidas pelo método REML/BLUP (máxima verossimilhança restrita -melhor predição linear não viciada), empregando-se o software genético-estatístico Selegen. Pelo teste da razão de verossimilhança não foram detectadas diferenças significativas entre e dentro de progênies de Dipteryx alata para os caracteres de crescimento, apenas para bifurcação observou-se diferença significativa tanto para o efeito de progênies quanto para o efeito de parcela. As herdabilidades individuais no sentido restrito foram muito baixas para maioria dos caracteres, com exceção da altura (0,27), que por sua vez, apresentou a maior acurácia. Recomenda-se realizar desbaste para eliminar os indivíduos de baixa produção e aumentar a base genética dessa população a partir da introdução de outros genótipos.Palavras-chave: conservação genética, herdabilidade, produção de sementes florestais, recursos genéti-cos florestais, variabilidade genética. AbstractThe aim of this work was to estimate the genetic variation among and within Dipteryx alata progenies to propose a selective logging to establish a seedling seed orchard with variability and genetic quality. The progeny test was established in December 1986 at Pederneiras Experimental Station, São Paulo Forestry Institute, following a randomised block design with 25 progenies, five replications, five plants per plot and

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Section: Resultsunclassified

Variação genética em caracteres de crescimento em progênies de Dipteryx alata Vog.

Pagliarini¹,

Konrad²,

Silva³

et al. 2016

Sci. For.

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“…For the cultivation of a native species, a broad knowledge of its biological and silvicultural characteristics is necessary. To this end, several studies have been conducted on D. alata, most of which aimed to obtain information on food and nutrition (Sousa et al 2018), agronomic and silvicultural aspects (Santos et al 2014, ex situ and in situ conservation (Melo et al 2011, Tambarussi et al 2017, Guimarães et al 2019, and genetic variability (Soares et al 2008a, Soares et al 2008b, Soares et al 2015.…”

Section: Introductionmentioning

confidence: 99%

Assessing genetic diversity and population structure in a Dipteryx alata germplasm collection utilizing microsatellite markers

Guimarães

Miranda

Mota

et al. 2019

Crop Breed. Appl. Biotechnol.

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Dipteryx alata Vogel (Leguminosae) is a native Neotropical tree with a wide distribution in the Brazilian Cerrado that is commonly known as the baru tree. The genetic diversity of 150 D. alata progeny from a germplasm collection was characterized using nine microsatellite markers. Genetic diversity analysis detected 50 alleles ranging from 2 to 14 alleles per locus. The genetic differentiation among populations (ϑ p = 0.097) suggests moderate genetic structuring and high genetic differentiation among progenies (ϑ s = 0.169). The intrapopulation index (f = 0.122) indicates the presence of low endogamy. The effective population size (N e = 96) shows that the germplasm collection has sufficient representativeness for use as a base population for breeding programmes. These results are useful for the exploitation of the genetic resources of D. alata for future conservation efforts and breeding programmes.

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“…This methodology has been widely used to estimate genetic parameters, select progenies, adaptability and stability. It is also used in breeding programs of perennial species, such as bacuri (Maia et al, 2016a), cajuí (small cashew) (Maia et al, 2016b), baru (Santos et al, 2014), Brazil nut (Pedrozo et al, 2015), passion fruit (Santos et al, 2015;Freitas et al, 2016;Silva et al, 2016), coffee (Rodrigues et al, 2013), peach (Bruna et al, 2012, and others. Nevertheless, references in the literature were not found regarding the use of this method in grape breeding.…”

Section: Introductionmentioning

confidence: 99%

Repeatability coefficients and genetic gains in table grape progenies for the Brazilian semi-arid region

Leão

Nunes

Souza

2018

Sci. agric. (Piracicaba, Braz.)

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Table grape stands out among the main fruit-bearing plants of irrigated agriculture in the São Francisco Valley region of Brazil. This study estimated repeatability and heritability coefficients and predicted genetic gains in order to select superior genotypes in grape progenies from controlled hybridizations using the Restricted Maximum Likelihood/Best Linear Unbiased Prediction (REML/BLUP) methodology. Individual plants were evaluated for the variables of production (kg per plant), number of bunches, bunch weight (g), berry diameter (mm), and soluble solids content (°Brix). We evaluated 194 hybrids from 30 crosses between Vitis vinifera and interspecific hybrids in Juazeiro, Bahia State, Brazil, over four growing seasons. Repeatability coefficients, ranging from 0.164 for soluble solids content to 0.72 for berry diameter, were estimated with accuracy values higher than 80 % for all variables, except for soluble solids content (66 %). The 30 best individuals classified for each variable exhibited genetic gains and their new estimated mean values were higher than the overall mean of the population in all variables. Regarding production and number of bunches per plant as the main variables, 15 genotypes were selected simultaneously for both variables. Among which, hybrids CPATSA 15.05, 15.06, 15.06T, and 23.103 stand out because they have trace seeds and should be selected for the following steps of genetic breeding to develop new table grape cultivars for the Brazilian semiarid region.

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Estimation of genetic parameters and verification of early selection efficiency in baru (Dipteryx alata)

Abstract: -This study aimed at verifying the efficiency of early selection, and estimating the genetic parameters in

Cited by 9 publications

References 10 publications

Variação genética em caracteres de crescimento em progênies de Dipteryx alata Vog.

Variação genética em caracteres de crescimento em progênies de Dipteryx alata Vog.

Assessing genetic diversity and population structure in a Dipteryx alata germplasm collection utilizing microsatellite markers

Repeatability coefficients and genetic gains in table grape progenies for the Brazilian semi-arid region

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