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http://hdl.handle.net/1843/45598| Type: | Artigo de Periódico |
| Title: | Repeatability and genotypic stability of agronomic characteristics in Panicum maximum Jacq. |
| Authors: | Mariane Rodrigues Ferreira Janaina Azevedo Martuscello Thiago Gomes dos Santos Braz Artur Amaral Nascimento Liana Jank Juliana Aparecida de Assis Otávio Goulart de Almeida Gabriel de Assis Reis Márcia Vitória Santos Matheus Figueiredo Santos |
| Abstract: | In experiments with selection of perennial plants, the initial performance is expected to be maintained throughout the productive life. The probability of repeating the agronomic response can be evaluated by the repeatability coefficient. The objective was to estimate repeatability coefficients of agronomic characteristics in Panicum maximum Jacq. using different methods and identify the best combinations between harvests according to the genotypic stabilization. Seventeen genotypes were evaluated in a randomized complete block design with three replicates. The coefficients of repeatability were estimated by the methods: ANOVA, structural analysis based on the mean of the correlation coefficients (SACOR), analysis of principal components based on the covariance matrix (PCCOV) and correlation matrix (PCCOR). In the genotypic stabilization, coefficients estimated by ANOVA and PCCOR were used. For total DM, repeatability coefficients ranged from 0.3500 to 0.4300 by the ANOVA and PCCOR methods, respectively. High repeatability coefficients were found for the characteristic leaf DM, while low coefficients were observed for leaf and stem percentages and leaf:stem ratio. For the genotypic stabilization of total DM and leaf:stem ratio, the best coefficients were observed for the combination of harvests 5 to 8. There are variations in the estimate of repeatability by different methods and the highest coefficients were those of the principal components based on the correlation and covariance matrices. For the genotypic stabilization, the best coefficients of repeatability and determination were observed for the harvests performed in the second rainy period. |
| Subject: | Plantas forrageiras Capim-guiné Forragem Genética vegetal |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICA - INSTITUTO DE CIÊNCIAS AGRÁRIAS |
| Rights: | Acesso Aberto |
| metadata.dc.identifier.doi: | 10.4067/S0718-58392019000400547 |
| URI: | http://hdl.handle.net/1843/45598 |
| Issue Date: | 2019 |
| metadata.dc.url.externa: | https://www.scielo.cl/scielo.php?pid=S0718-58392019000400547&script=sci_arttext&tlng=pt |
| metadata.dc.relation.ispartof: | Chilean Journal of Agricultural Research |
| Appears in Collections: | Artigo de Periódico |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Repeatability and genotypic stability of agronomic characteristics in Panicum maximum Jacq..pdf | 366.7 kB | Adobe PDF | View/Open |
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