Genetic parameters and estimated genetic gains in young rubber tree progenies
The objective of this work was to assess the genetic parameters and to estimate genetic gains in young rubber tree progenies. The experiments were carried out during three years, in a randomized block design, with six replicates and ten plants per plot, in three representative Hevea crop regions of...
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| Format: | Article |
| Language: | English |
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Embrapa Informação Tecnológica
2013-04-01
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| Series: | Pesquisa Agropecuária Brasileira |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000400009&lng=en&tlng=en |
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| author | Cecília Khusala Verardi Erivaldo José Scaloppi Junior Guilherme Augusto Peres Silva Lígia Regina Lima Gouvêa Paulo de Souza Gonçalves |
| author_facet | Cecília Khusala Verardi Erivaldo José Scaloppi Junior Guilherme Augusto Peres Silva Lígia Regina Lima Gouvêa Paulo de Souza Gonçalves |
| author_sort | Cecília Khusala Verardi |
| collection | DOAJ |
| description | The objective of this work was to assess the genetic parameters and to estimate genetic gains in young rubber tree progenies. The experiments were carried out during three years, in a randomized block design, with six replicates and ten plants per plot, in three representative Hevea crop regions of the state of São Paulo, Brazil. Twenty-two progenies were evaluated, from three to five years old, for rubber yield and annual girth growth. Genetic gain was estimated with the multi-effect index (MEI). Selection by progenies means provided greater estimated genetic gain than selection based on individuals, since heritability values of progeny means were greater than the ones of individual heritability, for both evaluated variables, in all the assessment years. The selection of the three best progenies for rubber yield provided a selection gain of 1.28 g per plant. The genetic gains estimated with MEI using data from early assessments (from 3 to 5-year-old) were generally high for annual girth growth and rubber yield. The high genetic gains for annual girth growth in the first year of assessment indicate that progenies can be selected at the beginning of the breeding program. Population effective size was consistent with the three progenies selected, showing that they were not related and that the population genetic variability is ensured. Early selection with the genetic gains estimated by MEI can be made on rubber tree progenies. |
| first_indexed | 2024-04-12T13:28:52Z |
| format | Article |
| id | doaj.art-10fbbbb066ce422ab97f9f7fa387ae75 |
| institution | Directory Open Access Journal |
| issn | 1678-3921 |
| language | English |
| last_indexed | 2024-04-12T13:28:52Z |
| publishDate | 2013-04-01 |
| publisher | Embrapa Informação Tecnológica |
| record_format | Article |
| series | Pesquisa Agropecuária Brasileira |
| spelling | doaj.art-10fbbbb066ce422ab97f9f7fa387ae752022-12-22T03:31:14ZengEmbrapa Informação TecnológicaPesquisa Agropecuária Brasileira1678-39212013-04-0148441141610.1590/S0100-204X2013000400009S0100-204X2013000400009Genetic parameters and estimated genetic gains in young rubber tree progeniesCecília Khusala Verardi0Erivaldo José Scaloppi Junior1Guilherme Augusto Peres Silva2Lígia Regina Lima Gouvêa3Paulo de Souza Gonçalves4Instituto AgronômicoAgência Paulista de Tecnologia dos AgronegóciosInstituto AgronômicoInstituto AgronômicoInstituto AgronômicoThe objective of this work was to assess the genetic parameters and to estimate genetic gains in young rubber tree progenies. The experiments were carried out during three years, in a randomized block design, with six replicates and ten plants per plot, in three representative Hevea crop regions of the state of São Paulo, Brazil. Twenty-two progenies were evaluated, from three to five years old, for rubber yield and annual girth growth. Genetic gain was estimated with the multi-effect index (MEI). Selection by progenies means provided greater estimated genetic gain than selection based on individuals, since heritability values of progeny means were greater than the ones of individual heritability, for both evaluated variables, in all the assessment years. The selection of the three best progenies for rubber yield provided a selection gain of 1.28 g per plant. The genetic gains estimated with MEI using data from early assessments (from 3 to 5-year-old) were generally high for annual girth growth and rubber yield. The high genetic gains for annual girth growth in the first year of assessment indicate that progenies can be selected at the beginning of the breeding program. Population effective size was consistent with the three progenies selected, showing that they were not related and that the population genetic variability is ensured. Early selection with the genetic gains estimated by MEI can be made on rubber tree progenies.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000400009&lng=en&tlng=enHevea brasiliensiscrescimento anual do cauleseleção precocetamanho efetivo populacionalíndice multiefeitoprodução de borracha |
| spellingShingle | Cecília Khusala Verardi Erivaldo José Scaloppi Junior Guilherme Augusto Peres Silva Lígia Regina Lima Gouvêa Paulo de Souza Gonçalves Genetic parameters and estimated genetic gains in young rubber tree progenies Pesquisa Agropecuária Brasileira Hevea brasiliensis crescimento anual do caule seleção precoce tamanho efetivo populacional índice multiefeito produção de borracha |
| title | Genetic parameters and estimated genetic gains in young rubber tree progenies |
| title_full | Genetic parameters and estimated genetic gains in young rubber tree progenies |
| title_fullStr | Genetic parameters and estimated genetic gains in young rubber tree progenies |
| title_full_unstemmed | Genetic parameters and estimated genetic gains in young rubber tree progenies |
| title_short | Genetic parameters and estimated genetic gains in young rubber tree progenies |
| title_sort | genetic parameters and estimated genetic gains in young rubber tree progenies |
| topic | Hevea brasiliensis crescimento anual do caule seleção precoce tamanho efetivo populacional índice multiefeito produção de borracha |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000400009&lng=en&tlng=en |
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