Crescimento inicial e diversidade genética em progênies de Zeyheria tuberculosa (Vell.) Bureau (Bignoniaceae)

Detalhes bibliográficos
Autor(a) principal: Assunção, Raul Reis
Data de Publicação: 2022
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/50001
Resumo: Despite the wide Brazilian biodiversity, the number of native forest species used in genetic breeding and forestry programs is still scarce. Even though its economic value for the timber market is recognized, their exploration in natural forests, mostly illegally, continues to be more common than commercial plantations, reducing the number of individuals and their genetic basis in natural biomes. Among numbers of species with high potential for domestication, Zeyheria tuberculosa (ipê-felpudo) stands out as a Bignoniaceae family species, native from the Atlantic Forest and Cerrado biomes, classified as vulnerable to extinction and which presents a series of favorable characteristics for domestication, such as: fast growth, monopodial growth, good stem shape, easy seedling production and wood of noble quality. With the purpose of contributing to its genetic breeding, the present work aims to estimate genetic parameters for initial growth’s characters and to quantify the genetic diversity and structure in Zeyheria tuberculosa progenies, as a subsidy for early selection and seedling seed orchards formation. The experiment contains 71 progenies and was installed in the municipality of Ijaci-MG, in a randomized block design, with 15 replications, resulting in 1065 single-plant plots in total. At 15 and 21 months old, data on height (ALT), diameter at ground height (DAS) and survival (SOB%) were collected. For each of the variables, variance components and breeding values were estimated using the REML/BLUP procedure, which maximizes gains and considers the kinship between individuals. For that, the model 19 of SELEGEN software was adopted, which is applied to the evaluation of open pollinated progenies. Based on the first evaluation, at 15 months old, 96 individuals (12 families, with 8 individuals in each) with higher predicted genetic values were selected, which underwent molecular analysis via ISSR markers. The diversity values presented by the Nei index (H*) was 0.35 and by the Shannon index (I*) was 0.52, which is considered from intermediate to high genetic diversity. Results indicated great genetic differentiation between progenies (Φst = 0.1991), in addition, the percentage of genetic variation was greater within (80.1%) than between (19.9%) progenies. Subsequently, based on the second evaluation, at 21 months old, variance and mean components between the progenies were estimated. The progenies showed a statistically significant difference for the characteristics of ALT and DAS, and the general average for ALT was 1.64 m (from 0.64 to 3.38 m), while for DAS, the general average was 3.79 cm (from 1.97 to 6.05 cm). The mortality percentage was 52% and the residual coefficients of variation (CVe%) were 59.41% for ALT and 36.22% for DAS, indicating high environmental influence. Individual heritability values (h²a) were classified as moderate magnitude for ALT (0.16) and DAS (0.46) and the selection accuracy was higher for DAS (0.81) than for ALT (0.62). In the end, three individuals with higher genotypic values within 41 families of positive genetic effects were selected based on the DAS, resulting in genetic gains greater than 0.55 cm. The effective population size (Ne) corresponding to the selection of 121 individuals was 122.54. The progenies analyzed in this study reveal enormous potential to compose a seedling seed orchard, both because of the satisfactory predicted values for genetic gain, and because they present high values of genetic diversity and Ne, which minimizes the risks of inbreeding depression or vigor losses.
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spelling Crescimento inicial e diversidade genética em progênies de Zeyheria tuberculosa (Vell.) Bureau (Bignoniaceae)Initial growth and genetic diversity in Zeyheria tuberculosa (Vell.) Bureau (Bignoniaceae) progeniesZeyheria tuberculosaMelhoramento genético florestalSeleção precoceDiversidade genéticaPomar de sementesIpê-felpudoForest genetic breedingEarly selectionGenetic diversitySeed orchardRecursos Florestais e Engenharia FlorestalDespite the wide Brazilian biodiversity, the number of native forest species used in genetic breeding and forestry programs is still scarce. Even though its economic value for the timber market is recognized, their exploration in natural forests, mostly illegally, continues to be more common than commercial plantations, reducing the number of individuals and their genetic basis in natural biomes. Among numbers of species with high potential for domestication, Zeyheria tuberculosa (ipê-felpudo) stands out as a Bignoniaceae family species, native from the Atlantic Forest and Cerrado biomes, classified as vulnerable to extinction and which presents a series of favorable characteristics for domestication, such as: fast growth, monopodial growth, good stem shape, easy seedling production and wood of noble quality. With the purpose of contributing to its genetic breeding, the present work aims to estimate genetic parameters for initial growth’s characters and to quantify the genetic diversity and structure in Zeyheria tuberculosa progenies, as a subsidy for early selection and seedling seed orchards formation. The experiment contains 71 progenies and was installed in the municipality of Ijaci-MG, in a randomized block design, with 15 replications, resulting in 1065 single-plant plots in total. At 15 and 21 months old, data on height (ALT), diameter at ground height (DAS) and survival (SOB%) were collected. For each of the variables, variance components and breeding values were estimated using the REML/BLUP procedure, which maximizes gains and considers the kinship between individuals. For that, the model 19 of SELEGEN software was adopted, which is applied to the evaluation of open pollinated progenies. Based on the first evaluation, at 15 months old, 96 individuals (12 families, with 8 individuals in each) with higher predicted genetic values were selected, which underwent molecular analysis via ISSR markers. The diversity values presented by the Nei index (H*) was 0.35 and by the Shannon index (I*) was 0.52, which is considered from intermediate to high genetic diversity. Results indicated great genetic differentiation between progenies (Φst = 0.1991), in addition, the percentage of genetic variation was greater within (80.1%) than between (19.9%) progenies. Subsequently, based on the second evaluation, at 21 months old, variance and mean components between the progenies were estimated. The progenies showed a statistically significant difference for the characteristics of ALT and DAS, and the general average for ALT was 1.64 m (from 0.64 to 3.38 m), while for DAS, the general average was 3.79 cm (from 1.97 to 6.05 cm). The mortality percentage was 52% and the residual coefficients of variation (CVe%) were 59.41% for ALT and 36.22% for DAS, indicating high environmental influence. Individual heritability values (h²a) were classified as moderate magnitude for ALT (0.16) and DAS (0.46) and the selection accuracy was higher for DAS (0.81) than for ALT (0.62). In the end, three individuals with higher genotypic values within 41 families of positive genetic effects were selected based on the DAS, resulting in genetic gains greater than 0.55 cm. The effective population size (Ne) corresponding to the selection of 121 individuals was 122.54. The progenies analyzed in this study reveal enormous potential to compose a seedling seed orchard, both because of the satisfactory predicted values for genetic gain, and because they present high values of genetic diversity and Ne, which minimizes the risks of inbreeding depression or vigor losses.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Apesar da ampla biodiversidade no Brasil, ainda é extremamente reduzido o número de espécies florestais nativas utilizadas em programas de melhoramento genético e de silvicultura. Por possuírem elevado valor econômico no mercado madeireiro, a exploração de espécies nativas em florestas naturais continua sendo mais usual que os plantios comerciais, reduzindo o número de indivíduos e a base genética das essências nativas. Dentre as espécies com elevado potencial para domesticação, destaca-se Zeyheria tuberculosa (ipê-felpudo), uma espécie da família Bignoniaceae, nativa dos biomas Mata Atlântica e Cerrado, classificada como vulnerável à extinção e que apresenta como características rápido crescimento, crescimento monopodial, boa forma de fuste, facilidade de produção de mudas e madeira de qualidade nobre. Visando contribuir para o melhoramento genético da espécie, o presente trabalho tem como objetivo estimar parâmetros genéticos para os caracteres de crescimento inicial e quantificar a diversidade e estrutura genética em progênies de Zeyheria tuberculosa, como subsídio para seleção precoce e formação de pomar de sementes por mudas (PSM). O experimento, com 71 progênies, foi instalado no município de Ijaci-MG, em delineamento de blocos ao acaso, com 15 repetições, totalizando 1065 parcelas de planta única. Aos 15 e aos 21 meses de idade, foram coletados dados de altura (ALT), diâmetro à altura do solo (DAS) e sobrevivência (SOB%). Para cada uma das variáveis, foram estimados componentes de variância e valores genéticos pelo procedimento REML/BLUP, que maximiza os ganhos, além de considerar o parentesco entre os indivíduos. Para tanto, adotou-se o modelo 19 do software SELEGEN, aplicado para avaliação de progênies de polinização aberta. Com base na primeira avaliação, aos 15 meses, foram selecionados 96 indivíduos (12 famílias, com 8 indivíduos em cada) de maiores valores genéticos, que foram submetidos à análise molecular via marcadores ISSR. O valor de diversidade apresentados pelo índice de Nei (H*) foi de 0,35 e pelo índice de Shannon (I*) foi de 0,52, o que é considerado de intermediária à alta diversidade genética. Os dados obtidos indicaram grande diferenciação genética entre as progênies (Φst = 0,1991), além disso, acusaram maior variação genética dentro (80,1%) do que entre (19,9%) progênies. Já com base na segunda avaliação, aos 21 meses, foram estimados componentes de variância e de média entre as progênies. As progênies diferiram para os caracteres de ALT e DAS, sendo que, a média geral para ALT foi de 1,64 m (de 0,64 a 3,38 m), enquanto para o DAS, a média geral foi de 3,79 cm (de 1,97 a 6,05 cm). O percentual de mortalidade foi de 52% e os coeficientes de variação residual (CVe%), foram de 59,41% para ALT e 36,22% para DAS, indicando elevada interferência ambiental. Os valores de herdabilidade individual (h²a) foram classificados como moderada magnitude para ALT (0,16) e DAS (0,46) e a acurácia de seleção foi maior para DAS (0,81) do que para ALT (0,62). Ao final, foram selecionados com base no DAS, três indivíduos com maiores valores genotípicos dentro de 41 famílias de efeitos genéticos positivos, resultando em ganhos genéticos superiores a 0,55 cm. O tamanho efetivo populacional (Ne) correspondente à seleção dos 121 indivíduos, foi de 122,54. As progênies analisadas nesse estudo revelam enorme potencial de comporem um PSM, tanto pelos satisfatórios valores preditos para ganho genético, quanto por apresentarem elevados valores de diversidade genética e de Ne, o que minimiza os riscos de depressão por endogamia ou perda de vigor.Universidade Federal de LavrasPrograma de Pós-Graduação em Engenharia FlorestalUFLAbrasilDepartamento de Ciências FlorestaisMelo, Lucas Amaral deCarvalho, Dulcinéia deSilva Júnior, Adelson Lemes daMelo, Lucas Amaral deSilva Júnior, Adelson Lemes daBarazetti, Viviane MariaKonzen, Enéas RicardoAssunção, Raul Reis2022-05-24T19:35:02Z2022-05-24T19:35:02Z2022-05-242022-02-25info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfASSUNÇÃO, R. R. Crescimento inicial e diversidade genética em progênies de Zeyheria tuberculosa (Vell.) Bureau (Bignoniaceae). 2022. 84 p. Dissertação (Mestrado em Engenharia Florestal) – Universidade Federal de Lavras, Lavras, 2022.http://repositorio.ufla.br/jspui/handle/1/50001porinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLA2023-05-11T12:17:50Zoai:localhost:1/50001Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2023-05-11T12:17:50Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Crescimento inicial e diversidade genética em progênies de Zeyheria tuberculosa (Vell.) Bureau (Bignoniaceae)
Initial growth and genetic diversity in Zeyheria tuberculosa (Vell.) Bureau (Bignoniaceae) progenies
title Crescimento inicial e diversidade genética em progênies de Zeyheria tuberculosa (Vell.) Bureau (Bignoniaceae)
spellingShingle Crescimento inicial e diversidade genética em progênies de Zeyheria tuberculosa (Vell.) Bureau (Bignoniaceae)
Assunção, Raul Reis
Zeyheria tuberculosa
Melhoramento genético florestal
Seleção precoce
Diversidade genética
Pomar de sementes
Ipê-felpudo
Forest genetic breeding
Early selection
Genetic diversity
Seed orchard
Recursos Florestais e Engenharia Florestal
title_short Crescimento inicial e diversidade genética em progênies de Zeyheria tuberculosa (Vell.) Bureau (Bignoniaceae)
title_full Crescimento inicial e diversidade genética em progênies de Zeyheria tuberculosa (Vell.) Bureau (Bignoniaceae)
title_fullStr Crescimento inicial e diversidade genética em progênies de Zeyheria tuberculosa (Vell.) Bureau (Bignoniaceae)
title_full_unstemmed Crescimento inicial e diversidade genética em progênies de Zeyheria tuberculosa (Vell.) Bureau (Bignoniaceae)
title_sort Crescimento inicial e diversidade genética em progênies de Zeyheria tuberculosa (Vell.) Bureau (Bignoniaceae)
author Assunção, Raul Reis
author_facet Assunção, Raul Reis
author_role author
dc.contributor.none.fl_str_mv Melo, Lucas Amaral de
Carvalho, Dulcinéia de
Silva Júnior, Adelson Lemes da
Melo, Lucas Amaral de
Silva Júnior, Adelson Lemes da
Barazetti, Viviane Maria
Konzen, Enéas Ricardo
dc.contributor.author.fl_str_mv Assunção, Raul Reis
dc.subject.por.fl_str_mv Zeyheria tuberculosa
Melhoramento genético florestal
Seleção precoce
Diversidade genética
Pomar de sementes
Ipê-felpudo
Forest genetic breeding
Early selection
Genetic diversity
Seed orchard
Recursos Florestais e Engenharia Florestal
topic Zeyheria tuberculosa
Melhoramento genético florestal
Seleção precoce
Diversidade genética
Pomar de sementes
Ipê-felpudo
Forest genetic breeding
Early selection
Genetic diversity
Seed orchard
Recursos Florestais e Engenharia Florestal
description Despite the wide Brazilian biodiversity, the number of native forest species used in genetic breeding and forestry programs is still scarce. Even though its economic value for the timber market is recognized, their exploration in natural forests, mostly illegally, continues to be more common than commercial plantations, reducing the number of individuals and their genetic basis in natural biomes. Among numbers of species with high potential for domestication, Zeyheria tuberculosa (ipê-felpudo) stands out as a Bignoniaceae family species, native from the Atlantic Forest and Cerrado biomes, classified as vulnerable to extinction and which presents a series of favorable characteristics for domestication, such as: fast growth, monopodial growth, good stem shape, easy seedling production and wood of noble quality. With the purpose of contributing to its genetic breeding, the present work aims to estimate genetic parameters for initial growth’s characters and to quantify the genetic diversity and structure in Zeyheria tuberculosa progenies, as a subsidy for early selection and seedling seed orchards formation. The experiment contains 71 progenies and was installed in the municipality of Ijaci-MG, in a randomized block design, with 15 replications, resulting in 1065 single-plant plots in total. At 15 and 21 months old, data on height (ALT), diameter at ground height (DAS) and survival (SOB%) were collected. For each of the variables, variance components and breeding values were estimated using the REML/BLUP procedure, which maximizes gains and considers the kinship between individuals. For that, the model 19 of SELEGEN software was adopted, which is applied to the evaluation of open pollinated progenies. Based on the first evaluation, at 15 months old, 96 individuals (12 families, with 8 individuals in each) with higher predicted genetic values were selected, which underwent molecular analysis via ISSR markers. The diversity values presented by the Nei index (H*) was 0.35 and by the Shannon index (I*) was 0.52, which is considered from intermediate to high genetic diversity. Results indicated great genetic differentiation between progenies (Φst = 0.1991), in addition, the percentage of genetic variation was greater within (80.1%) than between (19.9%) progenies. Subsequently, based on the second evaluation, at 21 months old, variance and mean components between the progenies were estimated. The progenies showed a statistically significant difference for the characteristics of ALT and DAS, and the general average for ALT was 1.64 m (from 0.64 to 3.38 m), while for DAS, the general average was 3.79 cm (from 1.97 to 6.05 cm). The mortality percentage was 52% and the residual coefficients of variation (CVe%) were 59.41% for ALT and 36.22% for DAS, indicating high environmental influence. Individual heritability values (h²a) were classified as moderate magnitude for ALT (0.16) and DAS (0.46) and the selection accuracy was higher for DAS (0.81) than for ALT (0.62). In the end, three individuals with higher genotypic values within 41 families of positive genetic effects were selected based on the DAS, resulting in genetic gains greater than 0.55 cm. The effective population size (Ne) corresponding to the selection of 121 individuals was 122.54. The progenies analyzed in this study reveal enormous potential to compose a seedling seed orchard, both because of the satisfactory predicted values for genetic gain, and because they present high values of genetic diversity and Ne, which minimizes the risks of inbreeding depression or vigor losses.
publishDate 2022
dc.date.none.fl_str_mv 2022-05-24T19:35:02Z
2022-05-24T19:35:02Z
2022-05-24
2022-02-25
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.uri.fl_str_mv ASSUNÇÃO, R. R. Crescimento inicial e diversidade genética em progênies de Zeyheria tuberculosa (Vell.) Bureau (Bignoniaceae). 2022. 84 p. Dissertação (Mestrado em Engenharia Florestal) – Universidade Federal de Lavras, Lavras, 2022.
http://repositorio.ufla.br/jspui/handle/1/50001
identifier_str_mv ASSUNÇÃO, R. R. Crescimento inicial e diversidade genética em progênies de Zeyheria tuberculosa (Vell.) Bureau (Bignoniaceae). 2022. 84 p. Dissertação (Mestrado em Engenharia Florestal) – Universidade Federal de Lavras, Lavras, 2022.
url http://repositorio.ufla.br/jspui/handle/1/50001
dc.language.iso.fl_str_mv por
language por
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Lavras
Programa de Pós-Graduação em Engenharia Florestal
UFLA
brasil
Departamento de Ciências Florestais
publisher.none.fl_str_mv Universidade Federal de Lavras
Programa de Pós-Graduação em Engenharia Florestal
UFLA
brasil
Departamento de Ciências Florestais
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv nivaldo@ufla.br || repositorio.biblioteca@ufla.br
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