Capacidade combinatória e parâmetros genéticos de genótipos de pinhão-manso quanto a caracteres morfoagronômicos

Santana, Ulisses Andrade; Carvalho, José Luiz Sandez de; Blank, Arie Fitzgerald; Silva-Mann, Renata

doi:10.1590/s0100-204x2013001100005

Cited by 9 publications

(10 citation statements)

References 9 publications

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“…These results indicate that in addition to the effects of dominance, additive genetic effects and maternal and/or extrachromosomal effects should be considered in breeding program aimed at improving traits assessed in this study. Similar results were reported by Biabani et al (2012) and Santana et al (2013), who by using diallel crosses in Jatropha observed a significant effect on GCA and SCA.…”

Section: Resultssupporting

confidence: 91%

Multivariate diallel analysis allows multiple gains in segregating populations for agronomic traits in Jatropha

Teodoro¹,

Rodrigues²,

Peixoto³

et al. 2017

Genet. Mol. Res.

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Section: Resultssupporting

confidence: 91%

Multivariate diallel analysis allows multiple gains in segregating populations for agronomic traits in Jatropha

Teodoro¹,

Rodrigues²,

Peixoto³

et al. 2017

Genet. Mol. Res.

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“…The variable that least contributed to the divergence was stem diameter, which had variation of 1.48%. Similar results were found by Santana et al (2013), who found the number of secondary branches among the descriptors that most contributed to the divergence among nine hybrids of J. curcas, and stem diameter as the least contributor (2%). Laviola et al (2011) also found similar results evaluating young stages of J. curcas plants from the germplasm bank of Planaltina DF, in an experimental area in partnership with the Embrapa Agroenergy and Embrapa Cerrado.…”

Section: Resultssupporting

confidence: 87%

Genetic Divergence and Morpho-Agronomic Performance of Jatropha Curcas L. Clones for Selection of Clonal Varieties

et al. 2016

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-The knowledge about genetic diversity of jatropha crop is important for genetic conservation resources and breeding of this species. The aim of this study was to evaluate the genetic diversity and performance of jatropha clones through morphological characterization to selection of clonal varieties for biofuels production. The clones were obtained through shoot cuttings from previous selection in a population of half-sibs progenies. The morphoagronomic analyses of clones was carried out at 180 days after transplantation and were evaluated plant height, stem diameter, number of primary branches and number of secondary branches, number of bunches and number of fruits per plant. Evaluating clones performance, significant results were found for the number of secondary branches. About analysis of genetic diversity, the measures of dissimilarity genetic varied from 0.62 to 13.11, this way, the UFRBPR14 and UFRBPR15 clones were more divergent. The Tocher method was efficient to verify formation of four groups. The characteristics that most contributed to the divergence among clones were branches number, height and number of bunches, and, stem diameter had lower contribution. The jatropha clones differed only in the secondary branches number and multivariate analysis showed divergence among the jatropha clones with formation of four groups. Also, branches number, plant height and number of bunches were characteristic that contributed to genetic divergence.Keywords: Jatropha curcas.L.. Genetic breeding. Genetic resources. DIVERGÊNCIA GENÉTICA E DESEMPENHO MORFOAGRONÔMICO DE CLONES DE PINHÃO MANSO VISANDO SELEÇÃO DE VARIEDADES CLONAISRESUMO -A necessidade do conhecimento da diversidade genética da cultura do pinhão manso é importante para conservação dos recursos genéticos e melhoramento genético dessa espécie. O objetivo desse trabalho foi avaliar a divergência genética e o desempenho e de clones de pinhão manso, através de caracteres morfoagronômicos, visando a seleção de variedades clonais produtivas para a produção de biocombustíveis. Os clones foram obtidos, através de estaquia, a partir da seleção em uma população de progênies meio-irmãos. A caracterização morfoagronômica dos clones foi realizada aos 180 dias após o transplante e foram avaliados a estatura da planta, diâmetro do caule, número de ramificações primárias e ramificações secundárias, número de cachos e número de frutos por planta. Quanto ao desempenho, resultados significativos foram encontrados para o número de ramos secundários. Quanto às análises de divergência genética as medidas de dissimilaridade genética apresentaram uma variação de 0,62 a 13,11, assim, os clones UFRBPR14 e UFRBPR15 foram mais divergentes. Pelo método de Tocher verificou-se a formação de quatro grupos. Os caracteres que mais contribuíram para a divergência entre os clones foram número de ramos secundários, estatura e número de cachos, a que menos contribuiu foi o diâmetro do caule. Os clones de pinhão manso diferiram apenas quanto ao número de ramos secundários, a anális...

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“…Estimates observed for PH and GY were reflected in the coefficient of determination of the effects of specific combining ability (c 2 fm ) obtained for these characteristics, which presented intermediate values according to the classification of Resende et al (2013). Biabani, Rafii, Saleh, Shabanimofrad, and Latif, (2012) and Santana et al (2013) observed higher σ d for PH, compared to σ a in diallel crosses with Jatropha. These results suggest that to improve the population in terms of these characteristics, methods must be adopted that prioritize the capitalization of heterosis (genetic dominance and divergence), and the breeding strategy should be recurrent inter-population selection to improve the best hybrids.…”

Section: Resultsmentioning

confidence: 93%

<b>Parental selection in diallel crosses of <i>Jatropha curcas</i> using mixed models

et al. 2018

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ABSTRACT. Diallel crosses in an unbalanced scheme were carried out in Jatropha to (i) evaluate the additive and non-additive genetic components; (ii) select parents through the general combining ability; (iii) estimate the specific combining ability used in the crosses; and (iv) verify the existence of the maternal effect and inbreeding depression. The experiment was carried out in a complete diallel scheme with four progenitors, unbalanced for the number of crosses. The experimental design consisted of a randomized block, with 5 replications and 3 plants per plot. The following characteristics were evaluated: stem diameter (SD), number of branches (NB), plant height (PH), canopy projection on the row (CPR), canopy projection between rows (CPB), mass of hundred grains (MHG) and grain yield (GY). Estimates of variances were obtained using the method of restricted maximum likelihood, while breeding values were estimated by the best linear unbiased prediction. It was concluded that the additive effect was predominant in the genetic control for SD, CPR, and CPB; the dominance effect was predominant for PH, NB, and GY; there was a cytoplasmic effect and nuclear genes of the female parent for all evaluated traits; parents 107 and 190 are promising for reducing the size and increasing the grain yield; there was inbreeding depression for SD and GY; and the favorable crosses for increasing GY were 190x107 and 190x190.Keywords: combining ability, REML, BLUP, plant breeding.Seleção de genitores em cruzamentos dialélicos em Jatropha curcas usando modelos mistos RESUMO. Cruzamentos dialélicos em esquema desbalanceado foram realizados em Jatropha para: (i) avaliar os componentes genéticos aditivos e não aditivos; (ii) selecionar genitores por meio da capacidade geral de combinação; (iii) estimar a capacidade especifica de cada cruzamento; (iv) verificar a existência de efeito materno e depressão endogâmica. O experimento foi conduzido em um arranjo dialelo completo com quatro genitores, desbalanceado para o número de cruzamentos. Foi utilizado um delineamento em blocos casualizados com 5 repetições e 3 plantas por parcela. As seguintes características foram avaliadas: diâmtro do caule (DC), número de ramos (NR), altura de plantas (AP), projeção da copa nas linhas (PCL), projeção da copa emtre linhas (PCE), e produtividade (P). As estimativas de variâncias foram obtidas utilizando o método da máxima verossimilhança restrita, e os valores genéticos foram estimados pelo melhor preditor linear não viesado. Concluiu-se que: O efeito aditivo foi predominante no controle genético para DC, PCL e PCE; o efeito de dominância foi predominante para AP, NR e P; existe efeito citoplasmático e genes nucleares do genitor feminino para todos os caracteres avaliados; os genitores 107 e 190 são os mais promissores para redução do porte e aumento na produtividade de grãos; existe depressão por endogamia para DC e P, e os cruzamentos favoráveis para incremento em P foram 190x107 e 190x190.Palavras-chave: capacidade de combinação, REML, BLUP, melh...

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Capacidade combinatória e parâmetros genéticos de genótipos de pinhão-manso quanto a caracteres morfoagronômicos

Cited by 9 publications

References 9 publications

Multivariate diallel analysis allows multiple gains in segregating populations for agronomic traits in Jatropha

Multivariate diallel analysis allows multiple gains in segregating populations for agronomic traits in Jatropha

Genetic Divergence and Morpho-Agronomic Performance of Jatropha Curcas L. Clones for Selection of Clonal Varieties

<b>Parental selection in diallel crosses of <i>Jatropha curcas</i> using mixed models

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