Genetic distance and its association with heterosis in cacao
The efficiency of cacao breeding program can be increased by choosing superior crosses to be made between divergent clones. We assessed the genetic distance among five clones with RAPD data (genetic distance - GD) and with yield component data (Mahalanobis distance - MD). The clones were evaluated i...
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| Format: | Article |
| Language: | English |
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Instituto de Tecnologia do Paraná (Tecpar)
2003-06-01
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| Series: | Brazilian Archives of Biology and Technology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000300005 |
| _version_ | 1817987007581782016 |
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| author | Luiz Antônio dos Santos Dias Jane Marita Cosme Damião Cruz Everaldo Gonçalves de Barros Tânia Maria Fernandes Salomão |
| author_facet | Luiz Antônio dos Santos Dias Jane Marita Cosme Damião Cruz Everaldo Gonçalves de Barros Tânia Maria Fernandes Salomão |
| author_sort | Luiz Antônio dos Santos Dias |
| collection | DOAJ |
| description | The efficiency of cacao breeding program can be increased by choosing superior crosses to be made between divergent clones. We assessed the genetic distance among five clones with RAPD data (genetic distance - GD) and with yield component data (Mahalanobis distance - MD). The clones were evaluated in a diallel, during five years, for five yield components. A total of 130 RAPD bands were scored. GD and MD were used to determine the correlation between genetic distances among clones and the performance of their hybrids. The correlation between GD and MD was 0.67 (P=0.03). Both distances were related to heterotic performance of hybrids for wet seed weight/plant and wet seed weight/fruit. The average hybrid performance for the same two yield components was correlated with only MD. Hence, genetic distances measured by RAPD and yield components can be used as a guide to the choice of the superior crosses.<br>A eficiência do programa de melhoramento de cacau incrementará pela seleção de cruzamentos superiores entre clones divergentes. Foram estimadas as distâncias genéticas (GD), com dados de RAPD, e de Mahalanobis (MD), com dados de componentes de produção, entre cinco clones. Os clones foram avaliados em um dialelo, por cinco componentes de produção, durante cinco anos. Um total de 130 bandas RAPD foram avaliadas. GD e MD foram utilizadas para cálculo da correlação entre distâncias entre clones e a performance de seus híbridos. A correlação entre GD e MD foi de 0.67 (P=0.03). Ambas as distâncias foram correlacionadas à performance heterótica dos híbridos para peso de sementes frescas/planta e peso de sementes frescas/fruto. A performance híbrida média para os mesmos componentes de produção foi correlacionada somente com MD. Assim, distâncias genéticas medidas por RAPD e componentes de produção podem ser usadas como um guia para a escolha de cruzamentos superiores. |
| first_indexed | 2024-04-14T00:16:30Z |
| format | Article |
| id | doaj.art-e23f05db18834ca2854e40106a602611 |
| institution | Directory Open Access Journal |
| issn | 1516-8913 1678-4324 |
| language | English |
| last_indexed | 2024-04-14T00:16:30Z |
| publishDate | 2003-06-01 |
| publisher | Instituto de Tecnologia do Paraná (Tecpar) |
| record_format | Article |
| series | Brazilian Archives of Biology and Technology |
| spelling | doaj.art-e23f05db18834ca2854e40106a6026112022-12-22T02:23:06ZengInstituto de Tecnologia do Paraná (Tecpar)Brazilian Archives of Biology and Technology1516-89131678-43242003-06-0146333934810.1590/S1516-89132003000300005Genetic distance and its association with heterosis in cacaoLuiz Antônio dos Santos DiasJane MaritaCosme Damião CruzEveraldo Gonçalves de BarrosTânia Maria Fernandes SalomãoThe efficiency of cacao breeding program can be increased by choosing superior crosses to be made between divergent clones. We assessed the genetic distance among five clones with RAPD data (genetic distance - GD) and with yield component data (Mahalanobis distance - MD). The clones were evaluated in a diallel, during five years, for five yield components. A total of 130 RAPD bands were scored. GD and MD were used to determine the correlation between genetic distances among clones and the performance of their hybrids. The correlation between GD and MD was 0.67 (P=0.03). Both distances were related to heterotic performance of hybrids for wet seed weight/plant and wet seed weight/fruit. The average hybrid performance for the same two yield components was correlated with only MD. Hence, genetic distances measured by RAPD and yield components can be used as a guide to the choice of the superior crosses.<br>A eficiência do programa de melhoramento de cacau incrementará pela seleção de cruzamentos superiores entre clones divergentes. Foram estimadas as distâncias genéticas (GD), com dados de RAPD, e de Mahalanobis (MD), com dados de componentes de produção, entre cinco clones. Os clones foram avaliados em um dialelo, por cinco componentes de produção, durante cinco anos. Um total de 130 bandas RAPD foram avaliadas. GD e MD foram utilizadas para cálculo da correlação entre distâncias entre clones e a performance de seus híbridos. A correlação entre GD e MD foi de 0.67 (P=0.03). Ambas as distâncias foram correlacionadas à performance heterótica dos híbridos para peso de sementes frescas/planta e peso de sementes frescas/fruto. A performance híbrida média para os mesmos componentes de produção foi correlacionada somente com MD. Assim, distâncias genéticas medidas por RAPD e componentes de produção podem ser usadas como um guia para a escolha de cruzamentos superiores.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000300005Genetic distancesheterosisperformance dataRAPD dataTheobroma cacao L. |
| spellingShingle | Luiz Antônio dos Santos Dias Jane Marita Cosme Damião Cruz Everaldo Gonçalves de Barros Tânia Maria Fernandes Salomão Genetic distance and its association with heterosis in cacao Brazilian Archives of Biology and Technology Genetic distances heterosis performance data RAPD data Theobroma cacao L. |
| title | Genetic distance and its association with heterosis in cacao |
| title_full | Genetic distance and its association with heterosis in cacao |
| title_fullStr | Genetic distance and its association with heterosis in cacao |
| title_full_unstemmed | Genetic distance and its association with heterosis in cacao |
| title_short | Genetic distance and its association with heterosis in cacao |
| title_sort | genetic distance and its association with heterosis in cacao |
| topic | Genetic distances heterosis performance data RAPD data Theobroma cacao L. |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000300005 |
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