Incorporating different proportions of exotic maize germplasm into two adapted populations.

Maize breeders frequently wish to use exotic germplasm in their breeding programs without losing specific characteristics of their adapted material. The objective of this study was to determine the optimal proportions of exotic germplasm to incorporate into adapted populations (F2 = 50% exotic, BC1...

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Autores: SANTOS, M. X. dos, POLLAK, L. M., PACHECO, C. A. P., GUIMARAES, P. E. O., PETERNELLI, L. A., PARENTONI, S. N., NASS, L. L.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2000
País:Brasil
Institución:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
Repositorio:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
Idioma:inglés
OAI Identifier:oai:www.alice.cnptia.embrapa.br:doc/484395
Acceso en línea:http://www.alice.cnptia.embrapa.br/alice/handle/doc/484395
Access Level:acceso abierto
Palabra clave:Exotico
Maize
Exotic
Germoplasma
Milho
Melhoramento
Zea Mays
breeding
germplasm
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network_acronym_str BR
network_name_str Brasil
repository_id_str
spelling Incorporating different proportions of exotic maize germplasm into two adapted populations.ExoticoMaizeExoticGermoplasmaMilhoMelhoramentoZea MaysbreedinggermplasmMaize breeders frequently wish to use exotic germplasm in their breeding programs without losing specific characteristics of their adapted material. The objective of this study was to determine the optimal proportions of exotic germplasm to incorporate into adapted populations (F2 = 50% exotic, BC1 = 25% exotic, BC2 = 12.5% exotic and BC3 = 6.25% exotic) to form the initial foundation population and to determine the heterosis between adapted x exotics. We used six exotic populations of different origins and two adapted populations representing a Brazilian heterotic pattern. In 1993-94 and 1994-95, the parents, F1, F2, BC1, BC2, BC3 and four checks were evaluated in six environments in central Brazil using an 8 x 9 simple rectangular lattice design. Higher mean values for yield were obtained as the proportions of exotic germplasm decreased. Some backcrosses produced more than the adapted populations BR 105 (7.59 ton/ha) and BR 106 (8.43 ton/ha). The best results were obtained when incorporating 6.25 or 12.5% of exotic genes. This trend was true for root lodging, stalk lodging and ear diseases but not for plant and ear height. The midparent heterosis for yield varied from - 16.1 to 40.3%. Midparent heterosis with positive and negative values were also found for the other traits. The results indicate the potential of exotic germplasm for developing good hybrids. After choosing the best exotic source, some recurrent selection might be appropriate in order to adapt and improve the exotic populations.CLESO ANTONIO PATTO PACHECO, CNPMS; PAULO EVARISTO DE O GUIMARAES, CNPMS; SIDNEY NETTO PARENTONI, CNPMS.2011-04-10T11:11:11Z2011-04-10T11:11:11Z2000-11-0720002018-06-08T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleGenetics and Molecular Biology, Ribeirão Preto, v. 23, n. 2, p. 445-451, 2000.http://www.alice.cnptia.embrapa.br/alice/handle/doc/484395enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPASANTOS, M. X. dosPOLLAK, L. M.PACHECO, C. A. P.GUIMARAES, P. E. O.PETERNELLI, L. A.PARENTONI, S. N.NASS, L. L.2017-08-15T23:24:03Zoai:www.alice.cnptia.embrapa.br:doc/484395Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-15T23:24:03Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Incorporating different proportions of exotic maize germplasm into two adapted populations.
title Incorporating different proportions of exotic maize germplasm into two adapted populations.
spellingShingle Incorporating different proportions of exotic maize germplasm into two adapted populations.
SANTOS, M. X. dos
Exotico
Maize
Exotic
Germoplasma
Milho
Melhoramento
Zea Mays
breeding
germplasm
title_short Incorporating different proportions of exotic maize germplasm into two adapted populations.
title_full Incorporating different proportions of exotic maize germplasm into two adapted populations.
title_fullStr Incorporating different proportions of exotic maize germplasm into two adapted populations.
title_full_unstemmed Incorporating different proportions of exotic maize germplasm into two adapted populations.
title_sort Incorporating different proportions of exotic maize germplasm into two adapted populations.
dc.creator.none.fl_str_mv SANTOS, M. X. dos
POLLAK, L. M.
PACHECO, C. A. P.
GUIMARAES, P. E. O.
PETERNELLI, L. A.
PARENTONI, S. N.
NASS, L. L.
author SANTOS, M. X. dos
author_facet SANTOS, M. X. dos
POLLAK, L. M.
PACHECO, C. A. P.
GUIMARAES, P. E. O.
PETERNELLI, L. A.
PARENTONI, S. N.
NASS, L. L.
author_role author
author2 POLLAK, L. M.
PACHECO, C. A. P.
GUIMARAES, P. E. O.
PETERNELLI, L. A.
PARENTONI, S. N.
NASS, L. L.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv CLESO ANTONIO PATTO PACHECO, CNPMS; PAULO EVARISTO DE O GUIMARAES, CNPMS; SIDNEY NETTO PARENTONI, CNPMS.
dc.subject.por.fl_str_mv Exotico
Maize
Exotic
Germoplasma
Milho
Melhoramento
Zea Mays
breeding
germplasm
topic Exotico
Maize
Exotic
Germoplasma
Milho
Melhoramento
Zea Mays
breeding
germplasm
description Maize breeders frequently wish to use exotic germplasm in their breeding programs without losing specific characteristics of their adapted material. The objective of this study was to determine the optimal proportions of exotic germplasm to incorporate into adapted populations (F2 = 50% exotic, BC1 = 25% exotic, BC2 = 12.5% exotic and BC3 = 6.25% exotic) to form the initial foundation population and to determine the heterosis between adapted x exotics. We used six exotic populations of different origins and two adapted populations representing a Brazilian heterotic pattern. In 1993-94 and 1994-95, the parents, F1, F2, BC1, BC2, BC3 and four checks were evaluated in six environments in central Brazil using an 8 x 9 simple rectangular lattice design. Higher mean values for yield were obtained as the proportions of exotic germplasm decreased. Some backcrosses produced more than the adapted populations BR 105 (7.59 ton/ha) and BR 106 (8.43 ton/ha). The best results were obtained when incorporating 6.25 or 12.5% of exotic genes. This trend was true for root lodging, stalk lodging and ear diseases but not for plant and ear height. The midparent heterosis for yield varied from - 16.1 to 40.3%. Midparent heterosis with positive and negative values were also found for the other traits. The results indicate the potential of exotic germplasm for developing good hybrids. After choosing the best exotic source, some recurrent selection might be appropriate in order to adapt and improve the exotic populations.
publishDate 2000
dc.date.none.fl_str_mv 2000-11-07
2000
2011-04-10T11:11:11Z
2011-04-10T11:11:11Z
2018-06-08T11:11:11Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv Genetics and Molecular Biology, Ribeirão Preto, v. 23, n. 2, p. 445-451, 2000.
http://www.alice.cnptia.embrapa.br/alice/handle/doc/484395
identifier_str_mv Genetics and Molecular Biology, Ribeirão Preto, v. 23, n. 2, p. 445-451, 2000.
url http://www.alice.cnptia.embrapa.br/alice/handle/doc/484395
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
collection Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
repository.name.fl_str_mv Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv cg-riaa@embrapa.br
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score 15,300719

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