| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Agroenergia. Para informações adicionais entre em contato com biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Agroenergia. |
|
Data corrente: |
25/09/2013 |
|
Data da última atualização: |
21/09/2017 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
LAVIOLA, B. G.; OLIVEIRA, A. M. C. e.; BHERING, L. L.; ALVES, A. A.; ROCHA, R. B.; GOMES, B. E. L.; CRUZ, C. D. |
|
Afiliação: |
BRUNO GALVEAS LAVIOLA, CNPAE; Ana Maria Cruz e Oliveira, Universidade Federal de Viçosa; Leonardo Lopes Bhering, Universidade Federal de Viçosa; ALEXANDRE ALONSO ALVES, CNPAE; RODRIGO BARROS ROCHA, CPAF-RO; Bruno Ermelindo Lopes Gomes, Universidade Federal de Viçosa; Cosme Damião Cruz, Universidade Federal de Viçosa. |
|
Título: |
Estimates of repeatability coefficients and selection gains in Jatropha indicate that higher cumulative genetic gains can be obtained by relaxing the degree of certainty in predicting the best families. |
|
Ano de publicação: |
2013 |
|
Fonte/Imprenta: |
Industrial Crops and Products, v. 51, p. 70-76, 2013. |
|
DOI: |
10.1016/j.indcrop.2013.08.016 |
|
Idioma: |
Inglês |
|
Conteúdo: |
The aim of this study was to estimate the repeatability coefficient of grain production in Jatropha, theminimum number of measurements needed to reliably predict the genetic value of selected families, andto determine the cumulative genetic gains when considering the selection of the best families based ondifferent number of measurements. The experiment was conducted with 175 accessions (half-siblingsprogenies derived from selected plants in the field) that compose part of a germplasm collection. Suchbank was established in a randomized block design with two blocks. In each block a given accession wasrepresented in a 5 plant/plot scheme (half-siblings). For the analysis, yield data obtained in the yearsof 2009?2012 were considered. The results of this study indicate that the repeatability coefficient ofgrain production in Jatropha is low (0.37), but comparable to other perennial species, and that to achievereliabilities of 70 and 80% in the prediction of breeding values of selected families, 4 and 7 years ofevaluation, respectively, are needed. The results of this study also indicate that the efficiency of earlyselection seems to be small in Jatropha since the coincidence rate of selected genotypes at early age (1 or2 years of evaluation) and genotypes selected in adult age (4 years assessment) is small (17?23%). Finally,taking into account the repeatability coefficients and coefficients of determination, in a hypotheticalperiod of 21 years (which is equivalent to three selection cycles using seven consecutive measurements? R2= 80%), this paper demonstrates that higher cumulative genetic gains can be obtained (159% over108%) by relaxing the degree of certainty in predicting the best families (R2= 65% instead of R2= 80%),since it makes possible to perform a greater number of selection cycles in the same period (7 cyclesinstead of 4). MenosThe aim of this study was to estimate the repeatability coefficient of grain production in Jatropha, theminimum number of measurements needed to reliably predict the genetic value of selected families, andto determine the cumulative genetic gains when considering the selection of the best families based ondifferent number of measurements. The experiment was conducted with 175 accessions (half-siblingsprogenies derived from selected plants in the field) that compose part of a germplasm collection. Suchbank was established in a randomized block design with two blocks. In each block a given accession wasrepresented in a 5 plant/plot scheme (half-siblings). For the analysis, yield data obtained in the yearsof 2009?2012 were considered. The results of this study indicate that the repeatability coefficient ofgrain production in Jatropha is low (0.37), but comparable to other perennial species, and that to achievereliabilities of 70 and 80% in the prediction of breeding values of selected families, 4 and 7 years ofevaluation, respectively, are needed. The results of this study also indicate that the efficiency of earlyselection seems to be small in Jatropha since the coincidence rate of selected genotypes at early age (1 or2 years of evaluation) and genotypes selected in adult age (4 years assessment) is small (17?23%). Finally,taking into account the repeatability coefficients and coefficients of determination, in a hypotheticalperiod of 21 years (which is equivalent to three sele... Mostrar Tudo |
|
Palavras-Chave: |
Crop energy; Jatropha curcas L; Selection. |
|
Thesaurus Nal: |
biodiesel; plant breeding; quantitative genetics. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02788naa a2200277 a 4500
001 1967044
005 2017-09-21
008 2013 bl uuuu u00u1 u #d
024 7 $a10.1016/j.indcrop.2013.08.016$2DOI
100 1 $aLAVIOLA, B. G.
245 $aEstimates of repeatability coefficients and selection gains in Jatropha indicate that higher cumulative genetic gains can be obtained by relaxing the degree of certainty in predicting the best families.$h[electronic resource]
260 $c2013
520 $aThe aim of this study was to estimate the repeatability coefficient of grain production in Jatropha, theminimum number of measurements needed to reliably predict the genetic value of selected families, andto determine the cumulative genetic gains when considering the selection of the best families based ondifferent number of measurements. The experiment was conducted with 175 accessions (half-siblingsprogenies derived from selected plants in the field) that compose part of a germplasm collection. Suchbank was established in a randomized block design with two blocks. In each block a given accession wasrepresented in a 5 plant/plot scheme (half-siblings). For the analysis, yield data obtained in the yearsof 2009?2012 were considered. The results of this study indicate that the repeatability coefficient ofgrain production in Jatropha is low (0.37), but comparable to other perennial species, and that to achievereliabilities of 70 and 80% in the prediction of breeding values of selected families, 4 and 7 years ofevaluation, respectively, are needed. The results of this study also indicate that the efficiency of earlyselection seems to be small in Jatropha since the coincidence rate of selected genotypes at early age (1 or2 years of evaluation) and genotypes selected in adult age (4 years assessment) is small (17?23%). Finally,taking into account the repeatability coefficients and coefficients of determination, in a hypotheticalperiod of 21 years (which is equivalent to three selection cycles using seven consecutive measurements? R2= 80%), this paper demonstrates that higher cumulative genetic gains can be obtained (159% over108%) by relaxing the degree of certainty in predicting the best families (R2= 65% instead of R2= 80%),since it makes possible to perform a greater number of selection cycles in the same period (7 cyclesinstead of 4).
650 $abiodiesel
650 $aplant breeding
650 $aquantitative genetics
653 $aCrop energy
653 $aJatropha curcas L
653 $aSelection
700 1 $aOLIVEIRA, A. M. C. e.
700 1 $aBHERING, L. L.
700 1 $aALVES, A. A.
700 1 $aROCHA, R. B.
700 1 $aGOMES, B. E. L.
700 1 $aCRUZ, C. D.
773 $tIndustrial Crops and Products$gv. 51, p. 70-76, 2013.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Agroenergia (CNPAE) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 250 | |
| 8. |  | PEREIRA, A. V.; MORENZ, M. J. F.; LEDO, F. J. da S.; FERREIRA, R. de P. Capim-elefante: versatilidades de usos na pecuária de leite. In: VILELA, D.; FERREIRA, R. de P.; FERNANDES, E. N.; JUNTOLLI, F. V. (Ed.). Pecuária de leite no Brasil: cenários e avanços tecnológicos. Brasília, DF: Embrapa, 2016. p. 187-211.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Gado de Leite; Embrapa Pecuária Sudeste. |
|    |
| 14. | | JORDÃO, A. R.; DERESZ, F.; MORENZ, M. J. F.; FERNANDES, A. M.; BALDI, D. G. Perdas de forragem em pastagens de capim-Tanzânia (Panicum maximum Jacq cv. Tanzania-1) submetidas a pastejo rotativo com intervalo entre desfolhas fixo ou flexível. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 49., 2012, Brasília. A produção animal no mundo em transformação: anais. Brasília, DF: SBZ, 2012.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Gado de Leite. |
| |
| Registros recuperados : 250 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
