Caracterização de germoplasma de pinhão manso (Jatropha curcas L.) por descritores morfo-agronômicos

Detalhes bibliográficos
Autor(a) principal: Freitas, Ricardo Galvão de
Data de Publicação: 2010
Tipo de documento: Dissertação
Idioma: por
Título da fonte: LOCUS Repositório Institucional da UFV
Texto Completo: http://locus.ufv.br/handle/123456789/4529
Resumo: Physic nut (Jatropha curcas L.) is a highly promising species for biofuel production. Its descriptors are known and evaluation of its genetic variability has not been done yet. This is the first study on genetic variability in J. curcas accessions and its aim was to start the definition of morph-agronomical descriptors in juvenile phase, to evaluate the and to estimate genetic parameters in progenies and their matrix. Germplasm bank (GBA) of J. curcas at UFV contains 75 accessions from Brazil and three from Cambodia. Evaluations were done at eight and at 14 months of field. Morph-agronomical descriptors evaluated in progenies were plant height (PH) and height of branches (HEIB), crown diameter (CD) and diameter of stem (DS), number of branches (NB), length (LL) and width (WL) of the leaf, LL/WL ratio and petiole size (PS). Descriptors of seed evaluated in matrix were oil content in the seeds (OIL), weight of 100 seeds (WS), length and width of the seeds and LS/WS ratio. Estimates of genetic parameters, analysis of genotypic correlation among descriptors and Mahalanobis distance, which quantified genetic variability, were processed using softwares SELEGEN e SAS. On this distance matrix, it was applied Tocher and UPGMA clusters. Genetic divergence was also evaluated through canonical variables. The relative contribution from descriptors for divergence was evaluated based on matrix of distances and eigenvectors estimate associated to the later canonical variables. These last analyses were processed using software GENES. Average oil content in seeds was 31% ranging from 16 to 45%. It was found no genetic correlation among morph-agronomical descriptors and oil content. High coefficients of genetic variation were found for seed descriptors (PS and OIL) and for morphagronomical at eight (HEIB, PH, NB and DS) and at 14 (HEIB and PS) months of field. The highest herdability coefficients in a strict sense were found, at eight months of field, for LL, WL and DS, and at 14 months of field, for descriptors LL, PS and WL. Tocher cluster made it possible, in both evaluation times, separation of accessions in three different groups. Dendogram by UPGMA was able to separate accesses, at eight and 14 months of field, in eight and 15 different groups, respectively. Analyses of canonical variable also evidenced divergence among accesses. The two first canonical variables explained 88.67 and 82.35% all variation, at eight and 14 months of field, respectively, forming four different groups for both ages of evaluation. The next step is choosing divergent groups and within them the identification of the most interesting accesses for the breeder. Thus, the existence of genetic diversity in GBA was proven which is important for continuity of genetic breeding works aiming at obtaining cultivars with high production of grain and high productivity of oil. Accessions with high oil content in the seeds were separately grouped, and crossing among them must be explored by the program. For registration of cultivar protection, the descriptors that contributed at most for divergence were PH and DS, the others vary in importance over time. Future evaluations involving the same descriptors and other related to reproductive cycle (inflorescences) and productive cycle (number of bunches, number of fruit per bunch, number of seeds per fruit and production) can increase even more the knowledge on the species and permit the advance on its breeding.
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spelling Freitas, Ricardo Galvão dehttp://lattes.cnpq.br/7975969936693486Missio, Robson Fernandohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4766079H6Resende, Marcos Deon Vilela dehttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4709374E4Dias, Luiz Antonio dos Santoshttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4763137P6Galvão, João Carlos Cardosohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4784805H4Oliveira, Lucimar Rodrigues dehttp://lattes.cnpq.br/9481467586868563Reis, Edésio Fialho doshttp://lattes.cnpq.br/49685605087637132015-03-26T13:39:37Z2011-10-212015-03-26T13:39:37Z2010-07-20FREITAS, Ricardo Galvão de. Characterization of germplasm of physic nut (Jatropha curcas L.) for morphoagronomic descriptors. 2010. 76 f. Dissertação (Mestrado em Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de) - Universidade Federal de Viçosa, Viçosa, 2010.http://locus.ufv.br/handle/123456789/4529Physic nut (Jatropha curcas L.) is a highly promising species for biofuel production. Its descriptors are known and evaluation of its genetic variability has not been done yet. This is the first study on genetic variability in J. curcas accessions and its aim was to start the definition of morph-agronomical descriptors in juvenile phase, to evaluate the and to estimate genetic parameters in progenies and their matrix. Germplasm bank (GBA) of J. curcas at UFV contains 75 accessions from Brazil and three from Cambodia. Evaluations were done at eight and at 14 months of field. Morph-agronomical descriptors evaluated in progenies were plant height (PH) and height of branches (HEIB), crown diameter (CD) and diameter of stem (DS), number of branches (NB), length (LL) and width (WL) of the leaf, LL/WL ratio and petiole size (PS). Descriptors of seed evaluated in matrix were oil content in the seeds (OIL), weight of 100 seeds (WS), length and width of the seeds and LS/WS ratio. Estimates of genetic parameters, analysis of genotypic correlation among descriptors and Mahalanobis distance, which quantified genetic variability, were processed using softwares SELEGEN e SAS. On this distance matrix, it was applied Tocher and UPGMA clusters. Genetic divergence was also evaluated through canonical variables. The relative contribution from descriptors for divergence was evaluated based on matrix of distances and eigenvectors estimate associated to the later canonical variables. These last analyses were processed using software GENES. Average oil content in seeds was 31% ranging from 16 to 45%. It was found no genetic correlation among morph-agronomical descriptors and oil content. High coefficients of genetic variation were found for seed descriptors (PS and OIL) and for morphagronomical at eight (HEIB, PH, NB and DS) and at 14 (HEIB and PS) months of field. The highest herdability coefficients in a strict sense were found, at eight months of field, for LL, WL and DS, and at 14 months of field, for descriptors LL, PS and WL. Tocher cluster made it possible, in both evaluation times, separation of accessions in three different groups. Dendogram by UPGMA was able to separate accesses, at eight and 14 months of field, in eight and 15 different groups, respectively. Analyses of canonical variable also evidenced divergence among accesses. The two first canonical variables explained 88.67 and 82.35% all variation, at eight and 14 months of field, respectively, forming four different groups for both ages of evaluation. The next step is choosing divergent groups and within them the identification of the most interesting accesses for the breeder. Thus, the existence of genetic diversity in GBA was proven which is important for continuity of genetic breeding works aiming at obtaining cultivars with high production of grain and high productivity of oil. Accessions with high oil content in the seeds were separately grouped, and crossing among them must be explored by the program. For registration of cultivar protection, the descriptors that contributed at most for divergence were PH and DS, the others vary in importance over time. Future evaluations involving the same descriptors and other related to reproductive cycle (inflorescences) and productive cycle (number of bunches, number of fruit per bunch, number of seeds per fruit and production) can increase even more the knowledge on the species and permit the advance on its breeding.Pinhão manso (Jatropha curcas L.) é uma espécie altamente promissora para produção de biodiesel. Seus descritores são desconhecidos e a avaliação da sua variabilidade genética ainda não foi feita. Este é o primeiro estudo da variabilidade genética em acessos de J. curcas e teve como objetivo iniciar a definição dos descritores morfo-agronômicos da fase juvenil, avaliar a variabilidade e estimar parâmetros genéticos em progênies e suas matrizes. O banco de germoplasma (BAG) de J. curcas da UFV contém 75 acessos do Brasil e três do Camboja. As avaliações foram realizadas aos oito e aos 14 meses de campo. Os descritores morfo-agronômicos avaliados nas progênies foram altura da planta (ALT) e da ramificação (ALTR), diâmetro da copa (DCP) e do caule (DCL), número de ramos (NR), comprimento (CF) e largura foliar (LF), razão CF/LF e tamanho do pecíolo (TP). Os descritores de sementes avaliados nas matrizes foram teor de óleo nas sementes (Óleo), peso de 100 sementes (PS), comprimento (CS) e largura das sementes (LS) e razão CS/LS. As estimativas de parâmetros genéticos, a análise de correlação genotípica entre descritores e a distância de Mahalanobis, que quantificou a variabilidade genética, foram processadas nos softwares SELEGEN e SAS. Sobre esta matriz de distância foram aplicados os agrupamentos de Tocher e UPGMA. A divergência genética também foi avaliada por variáveis canônicas. A contribuição relativa dos descritores para a divergência foi avaliada com base na matriz de distâncias e na estimativa dos autovetores associados às últimas variáveis canônicas. Estas últimas análises foram processadas no software GENES. O teor médio de óleo nas sementes foi 31%, com uma variação de 16 a 45%. Nenhuma correlação genética foi encontrada entre descritores morfo-agronômicos e teor de óleo. Elevados coeficientes de variação genética foram encontrados para os descritores de semente (PS e Óleo) e para os morfo-agronômicos aos oito (ALTR, ALT, NR e DCL) e aos 14 meses de campo (ALTR e TP). Os maiores coeficientes de herdabilidades no sentido restrito foram encontrados, aos oito meses de campo, para CF, LF e DCL e, aos 14 meses de campo, para os descritores CF, TP e LF. O agrupamento de Tocher possibilitou, em ambas as épocas de avaliação, a separação dos acessos em três grupos distintos. O dendrograma por UPGMA possibilitou a separação dos acessos, aos oito e 14 meses de campo, em oito e 15 grupos distintos, respectivamente. A análise de variáveis canônicas também evidenciou divergência entre acessos. As duas primeiras variáveis canônicas explicaram 88,67 e 82,35% de toda variação, aos oito e 14 meses de campo, respectivamente, formando quatro grupos distintos em ambas as idades de avaliação. O próximo passo é a escolha dos grupos divergentes e dentro deles a identificação dos acessos mais interessantes ao melhorista. Assim a existência de diversidade genética no BAG foi comprovada e isso é importante para continuidade dos trabalhos de melhoramento genético, com o objetivo de obter cultivares de elevada produção de grãos e alta produtividade de óleo. Acessos com alto teor de óleo nas sementes foram agrupados separadamente, e o cruzamento entre estes deve ser explorado pelo programa. Para o registro de proteção de cultivares, os descritores que mais contribuíram para a divergência foram ALT e DCL, os demais variam em importância com o passar do tempo. Avaliações futuras envolvendo os mesmos descritores e outros relacionados ao ciclo reprodutivo (inflorescências) e produtivo (número de cachos, de frutos por cacho, de sementes por frutos e produção) podem ampliar ainda mais o conhecimento da espécie e permitir o avanço do seu melhoramento.Conselho Nacional de Desenvolvimento Científico e Tecnológicoapplication/pdfporUniversidade Federal de ViçosaMestrado em FitotecniaUFVBRPlantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita deTeor de óleoDivergência genéticaEstimativas de parâmetros genéticosCorrelação genéticaAgrupamentoOil contentGenetic divergenceEstimate genetic parametersGenetic correlationGroupingCNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIACaracterização de germoplasma de pinhão manso (Jatropha curcas L.) por descritores morfo-agronômicosCharacterization of germplasm of physic nut (Jatropha curcas L.) for morphoagronomic descriptorsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFVORIGINALtexto completo.pdfapplication/pdf509482https://locus.ufv.br//bitstream/123456789/4529/1/texto%20completo.pdfed32a13244b163a7dcca86f047e20162MD51TEXTtexto completo.pdf.txttexto completo.pdf.txtExtracted texttext/plain159752https://locus.ufv.br//bitstream/123456789/4529/2/texto%20completo.pdf.txt4618920cf5b21b2479a942ae83e4cb97MD52THUMBNAILtexto completo.pdf.jpgtexto completo.pdf.jpgIM Thumbnailimage/jpeg3624https://locus.ufv.br//bitstream/123456789/4529/3/texto%20completo.pdf.jpg7562445d236012a98c4beccc1353a62bMD53123456789/45292016-04-10 23:05:36.177oai:locus.ufv.br:123456789/4529Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452016-04-11T02:05:36LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false
dc.title.por.fl_str_mv Caracterização de germoplasma de pinhão manso (Jatropha curcas L.) por descritores morfo-agronômicos
dc.title.alternative.eng.fl_str_mv Characterization of germplasm of physic nut (Jatropha curcas L.) for morphoagronomic descriptors
title Caracterização de germoplasma de pinhão manso (Jatropha curcas L.) por descritores morfo-agronômicos
spellingShingle Caracterização de germoplasma de pinhão manso (Jatropha curcas L.) por descritores morfo-agronômicos
Freitas, Ricardo Galvão de
Teor de óleo
Divergência genética
Estimativas de parâmetros genéticos
Correlação genética
Agrupamento
Oil content
Genetic divergence
Estimate genetic parameters
Genetic correlation
Grouping
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA
title_short Caracterização de germoplasma de pinhão manso (Jatropha curcas L.) por descritores morfo-agronômicos
title_full Caracterização de germoplasma de pinhão manso (Jatropha curcas L.) por descritores morfo-agronômicos
title_fullStr Caracterização de germoplasma de pinhão manso (Jatropha curcas L.) por descritores morfo-agronômicos
title_full_unstemmed Caracterização de germoplasma de pinhão manso (Jatropha curcas L.) por descritores morfo-agronômicos
title_sort Caracterização de germoplasma de pinhão manso (Jatropha curcas L.) por descritores morfo-agronômicos
author Freitas, Ricardo Galvão de
author_facet Freitas, Ricardo Galvão de
author_role author
dc.contributor.authorLattes.por.fl_str_mv http://lattes.cnpq.br/7975969936693486
dc.contributor.author.fl_str_mv Freitas, Ricardo Galvão de
dc.contributor.advisor-co1.fl_str_mv Missio, Robson Fernando
dc.contributor.advisor-co1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4766079H6
dc.contributor.advisor-co2.fl_str_mv Resende, Marcos Deon Vilela de
dc.contributor.advisor-co2Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4709374E4
dc.contributor.advisor1.fl_str_mv Dias, Luiz Antonio dos Santos
dc.contributor.advisor1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4763137P6
dc.contributor.referee1.fl_str_mv Galvão, João Carlos Cardoso
dc.contributor.referee1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4784805H4
dc.contributor.referee2.fl_str_mv Oliveira, Lucimar Rodrigues de
dc.contributor.referee2Lattes.fl_str_mv http://lattes.cnpq.br/9481467586868563
dc.contributor.referee3.fl_str_mv Reis, Edésio Fialho dos
dc.contributor.referee3Lattes.fl_str_mv http://lattes.cnpq.br/4968560508763713
contributor_str_mv Missio, Robson Fernando
Resende, Marcos Deon Vilela de
Dias, Luiz Antonio dos Santos
Galvão, João Carlos Cardoso
Oliveira, Lucimar Rodrigues de
Reis, Edésio Fialho dos
dc.subject.por.fl_str_mv Teor de óleo
Divergência genética
Estimativas de parâmetros genéticos
Correlação genética
Agrupamento
topic Teor de óleo
Divergência genética
Estimativas de parâmetros genéticos
Correlação genética
Agrupamento
Oil content
Genetic divergence
Estimate genetic parameters
Genetic correlation
Grouping
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA
dc.subject.eng.fl_str_mv Oil content
Genetic divergence
Estimate genetic parameters
Genetic correlation
Grouping
dc.subject.cnpq.fl_str_mv CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA
description Physic nut (Jatropha curcas L.) is a highly promising species for biofuel production. Its descriptors are known and evaluation of its genetic variability has not been done yet. This is the first study on genetic variability in J. curcas accessions and its aim was to start the definition of morph-agronomical descriptors in juvenile phase, to evaluate the and to estimate genetic parameters in progenies and their matrix. Germplasm bank (GBA) of J. curcas at UFV contains 75 accessions from Brazil and three from Cambodia. Evaluations were done at eight and at 14 months of field. Morph-agronomical descriptors evaluated in progenies were plant height (PH) and height of branches (HEIB), crown diameter (CD) and diameter of stem (DS), number of branches (NB), length (LL) and width (WL) of the leaf, LL/WL ratio and petiole size (PS). Descriptors of seed evaluated in matrix were oil content in the seeds (OIL), weight of 100 seeds (WS), length and width of the seeds and LS/WS ratio. Estimates of genetic parameters, analysis of genotypic correlation among descriptors and Mahalanobis distance, which quantified genetic variability, were processed using softwares SELEGEN e SAS. On this distance matrix, it was applied Tocher and UPGMA clusters. Genetic divergence was also evaluated through canonical variables. The relative contribution from descriptors for divergence was evaluated based on matrix of distances and eigenvectors estimate associated to the later canonical variables. These last analyses were processed using software GENES. Average oil content in seeds was 31% ranging from 16 to 45%. It was found no genetic correlation among morph-agronomical descriptors and oil content. High coefficients of genetic variation were found for seed descriptors (PS and OIL) and for morphagronomical at eight (HEIB, PH, NB and DS) and at 14 (HEIB and PS) months of field. The highest herdability coefficients in a strict sense were found, at eight months of field, for LL, WL and DS, and at 14 months of field, for descriptors LL, PS and WL. Tocher cluster made it possible, in both evaluation times, separation of accessions in three different groups. Dendogram by UPGMA was able to separate accesses, at eight and 14 months of field, in eight and 15 different groups, respectively. Analyses of canonical variable also evidenced divergence among accesses. The two first canonical variables explained 88.67 and 82.35% all variation, at eight and 14 months of field, respectively, forming four different groups for both ages of evaluation. The next step is choosing divergent groups and within them the identification of the most interesting accesses for the breeder. Thus, the existence of genetic diversity in GBA was proven which is important for continuity of genetic breeding works aiming at obtaining cultivars with high production of grain and high productivity of oil. Accessions with high oil content in the seeds were separately grouped, and crossing among them must be explored by the program. For registration of cultivar protection, the descriptors that contributed at most for divergence were PH and DS, the others vary in importance over time. Future evaluations involving the same descriptors and other related to reproductive cycle (inflorescences) and productive cycle (number of bunches, number of fruit per bunch, number of seeds per fruit and production) can increase even more the knowledge on the species and permit the advance on its breeding.
publishDate 2010
dc.date.issued.fl_str_mv 2010-07-20
dc.date.available.fl_str_mv 2011-10-21
2015-03-26T13:39:37Z
dc.date.accessioned.fl_str_mv 2015-03-26T13:39:37Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.citation.fl_str_mv FREITAS, Ricardo Galvão de. Characterization of germplasm of physic nut (Jatropha curcas L.) for morphoagronomic descriptors. 2010. 76 f. Dissertação (Mestrado em Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de) - Universidade Federal de Viçosa, Viçosa, 2010.
dc.identifier.uri.fl_str_mv http://locus.ufv.br/handle/123456789/4529
identifier_str_mv FREITAS, Ricardo Galvão de. Characterization of germplasm of physic nut (Jatropha curcas L.) for morphoagronomic descriptors. 2010. 76 f. Dissertação (Mestrado em Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de) - Universidade Federal de Viçosa, Viçosa, 2010.
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dc.publisher.department.fl_str_mv Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de
publisher.none.fl_str_mv Universidade Federal de Viçosa
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