Repeatability estimates and minimum number of evaluations for selection of elephant-grass genotypes for herbage production
In forage-plants breeding, the selection of superior genotypes has been undertaken through successive harvests in previously established intervals. However, this process involves many steps, the evaluation of many traits, and a great spending with costs and labor. Thus the estimate of the repeatabil...
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| Format: | Article |
| Language: | English |
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Universidade Federal de Uberlândia
2020-01-01
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| Series: | Bioscience Journal |
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| Online Access: | https://seer-dev.ufu.br/index.php/biosciencejournal/article/view/42075 |
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| author | Erina Vitório Rodrigues Rogério Figueiredo Daher Geraldo de Amaral Gravina Alexandre Pio Viana Maria do Socorro Bezerra de Araújo Maria Lorraine Fonseca Oliveira Marcelo Vivas Bruna Rafaela da Silva Menezes Antônio Vander Pereira |
| author_facet | Erina Vitório Rodrigues Rogério Figueiredo Daher Geraldo de Amaral Gravina Alexandre Pio Viana Maria do Socorro Bezerra de Araújo Maria Lorraine Fonseca Oliveira Marcelo Vivas Bruna Rafaela da Silva Menezes Antônio Vander Pereira |
| author_sort | Erina Vitório Rodrigues |
| collection | DOAJ |
| description | In forage-plants breeding, the selection of superior genotypes has been undertaken through successive harvests in previously established intervals. However, this process involves many steps, the evaluation of many traits, and a great spending with costs and labor. Thus the estimate of the repeatability is essential in improvement of perennials, it allows predicting genotypic value of the individual, the minimum number of evaluations in the selection of genotypes and minimizes resources and time in the selection of promising individuals. The objective of this study was to estimate the repeatability coefficient for morphological traits in elephant grass and determine the number of evaluations needed for phenotypic selection more efficient. The experimental randomized block design with 53 genotypes and two replications. The repeatability coefficients were estimated for variables plant height, number of tillers, stem diameter and dry matter yield, using the methods of Anova, Principal Components and Structural Analysis. We observed significant differences between genotypes (P <0.01) for all variables. The main components provide larger estimates of repeatability when compared to other methods. Estimates of the repeatability coefficients are of high magnitude average for the variables plant height (0.44) number of tillers (0.44) and stem diameter (0.63) and low magnitude for dry matter production (0.27). The Principal Components method requires five, five, two and eleven measurements for plant height, number of tillers, stem diameter and dry matter yield, respectively, with 80% reliability.
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| first_indexed | 2024-12-14T19:40:00Z |
| format | Article |
| id | doaj.art-d0b6af9819294140a1818afc9df36a99 |
| institution | Directory Open Access Journal |
| issn | 1981-3163 |
| language | English |
| last_indexed | 2024-12-14T19:40:00Z |
| publishDate | 2020-01-01 |
| publisher | Universidade Federal de Uberlândia |
| record_format | Article |
| series | Bioscience Journal |
| spelling | doaj.art-d0b6af9819294140a1818afc9df36a992022-12-21T22:49:44ZengUniversidade Federal de UberlândiaBioscience Journal1981-31632020-01-01361Repeatability estimates and minimum number of evaluations for selection of elephant-grass genotypes for herbage productionErina Vitório Rodrigues0Rogério Figueiredo Daher1Geraldo de Amaral Gravina2Alexandre Pio Viana3Maria do Socorro Bezerra de Araújo4Maria Lorraine Fonseca Oliveira5Marcelo Vivas6Bruna Rafaela da Silva Menezes7Antônio Vander Pereira8Universidade Federal de ViçosaUniversidade Estadual do Norte Fluminense Darcy RibeiroUniversidade Estadual do Norte Fluminense Darcy RibeiroUniversidade Estadual do Norte Fluminense Darcy RibeiroUniversidade Estadual do Norte Fluminense Darcy RibeiroUniversidade Estadual do Norte Fluminense Darcy RibeiroUniversidade Estadual do Norte Fluminense Darcy RibeiroUniversidade Estadual do Norte Fluminense Darcy RibeiroEmbrapa Gado de LeiteIn forage-plants breeding, the selection of superior genotypes has been undertaken through successive harvests in previously established intervals. However, this process involves many steps, the evaluation of many traits, and a great spending with costs and labor. Thus the estimate of the repeatability is essential in improvement of perennials, it allows predicting genotypic value of the individual, the minimum number of evaluations in the selection of genotypes and minimizes resources and time in the selection of promising individuals. The objective of this study was to estimate the repeatability coefficient for morphological traits in elephant grass and determine the number of evaluations needed for phenotypic selection more efficient. The experimental randomized block design with 53 genotypes and two replications. The repeatability coefficients were estimated for variables plant height, number of tillers, stem diameter and dry matter yield, using the methods of Anova, Principal Components and Structural Analysis. We observed significant differences between genotypes (P <0.01) for all variables. The main components provide larger estimates of repeatability when compared to other methods. Estimates of the repeatability coefficients are of high magnitude average for the variables plant height (0.44) number of tillers (0.44) and stem diameter (0.63) and low magnitude for dry matter production (0.27). The Principal Components method requires five, five, two and eleven measurements for plant height, number of tillers, stem diameter and dry matter yield, respectively, with 80% reliability. https://seer-dev.ufu.br/index.php/biosciencejournal/article/view/42075Pennisetum purpureum S.Coefficient of determinationMain componentsDry matter yield |
| spellingShingle | Erina Vitório Rodrigues Rogério Figueiredo Daher Geraldo de Amaral Gravina Alexandre Pio Viana Maria do Socorro Bezerra de Araújo Maria Lorraine Fonseca Oliveira Marcelo Vivas Bruna Rafaela da Silva Menezes Antônio Vander Pereira Repeatability estimates and minimum number of evaluations for selection of elephant-grass genotypes for herbage production Bioscience Journal Pennisetum purpureum S. Coefficient of determination Main components Dry matter yield |
| title | Repeatability estimates and minimum number of evaluations for selection of elephant-grass genotypes for herbage production |
| title_full | Repeatability estimates and minimum number of evaluations for selection of elephant-grass genotypes for herbage production |
| title_fullStr | Repeatability estimates and minimum number of evaluations for selection of elephant-grass genotypes for herbage production |
| title_full_unstemmed | Repeatability estimates and minimum number of evaluations for selection of elephant-grass genotypes for herbage production |
| title_short | Repeatability estimates and minimum number of evaluations for selection of elephant-grass genotypes for herbage production |
| title_sort | repeatability estimates and minimum number of evaluations for selection of elephant grass genotypes for herbage production |
| topic | Pennisetum purpureum S. Coefficient of determination Main components Dry matter yield |
| url | https://seer-dev.ufu.br/index.php/biosciencejournal/article/view/42075 |
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