Inbreeding depression of 28 maize elite open pollinated varieties.
The study of inbreeding depression is important for breeding strategies such as use of inbred progenies or extraction of inbreed lines. A diallel of 28 maize open-pollinated varieties was evaluated in 10 environments in the early 1990s. At the same time, S1 populations for each of the 28 varieties were evaluated in the same 10 experiments (environments). Yield reductions of the populations from S0 to S1 (mean of the 10 environments), varied from 34.6% (CMS-01) to 59.2% (CMS-30), with an average of 49.1%. Inbreeding depression was greater in populations with a wider genetic base, which had never been exposed to inbreeding (CMS-30, BR-107, PH4, Cunha, Saracura, Nitrodent, and Nitroflint). Inbred lines with greater yield means should be obtained from the BR-105, BR-111, CMS-01, CMS-03, BR-106, CMS-14c, and CMS-28 populations. The use of parameter estimates generated by analysis of inbreeding depression, allow to make inferences about frequencies of deleterious alleles in the population. The frequencies of favorable alleles in the parents can be obtained by diallel analysis. The association of these two types of information, can provide a better interpretation of the genetic parameters and also can improve the process of selection of parents for either an intra- or an inter-populational breeding program.
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Format: | Artigo de periódico biblioteca |
Language: | English eng |
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2004-12-20
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Subjects: | Endogamy, Maize, Diallel., breeding, inbreeding depression., |
Online Access: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/488462 |
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dig-alice-doc-4884622017-08-15T23:01:26Z Inbreeding depression of 28 maize elite open pollinated varieties. PACHECO, C. A. P. SANTOS, M. X. dos CRUZ, C. D. PARENTONI, S. N. GUIMARAES, P. E. de O. GAMA, E. E. G. e SILVA, A. E. de CARVALHO, H. W. L. CLESO ANTONIO PATTO PACHECO, CNPMS; SIDNEY NETTO PARENTONI, CNPMS; PAULO EVARISTO DE O GUIMARAES, CNPMS. Endogamy Maize Diallel. breeding inbreeding depression. The study of inbreeding depression is important for breeding strategies such as use of inbred progenies or extraction of inbreed lines. A diallel of 28 maize open-pollinated varieties was evaluated in 10 environments in the early 1990s. At the same time, S1 populations for each of the 28 varieties were evaluated in the same 10 experiments (environments). Yield reductions of the populations from S0 to S1 (mean of the 10 environments), varied from 34.6% (CMS-01) to 59.2% (CMS-30), with an average of 49.1%. Inbreeding depression was greater in populations with a wider genetic base, which had never been exposed to inbreeding (CMS-30, BR-107, PH4, Cunha, Saracura, Nitrodent, and Nitroflint). Inbred lines with greater yield means should be obtained from the BR-105, BR-111, CMS-01, CMS-03, BR-106, CMS-14c, and CMS-28 populations. The use of parameter estimates generated by analysis of inbreeding depression, allow to make inferences about frequencies of deleterious alleles in the population. The frequencies of favorable alleles in the parents can be obtained by diallel analysis. The association of these two types of information, can provide a better interpretation of the genetic parameters and also can improve the process of selection of parents for either an intra- or an inter-populational breeding program. 2011-04-10T11:11:11Z 2011-04-10T11:11:11Z 2004-12-20 2002 2018-05-30T11:11:11Z Artigo de periódico Genetics and Molecular Biology, Ribeirão Preto, v. 25, n. 4, p. 441-448, 2002. http://www.alice.cnptia.embrapa.br/alice/handle/doc/488462 en eng openAccess |
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Endogamy Maize Diallel. breeding inbreeding depression. Endogamy Maize Diallel. breeding inbreeding depression. |
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Endogamy Maize Diallel. breeding inbreeding depression. Endogamy Maize Diallel. breeding inbreeding depression. PACHECO, C. A. P. SANTOS, M. X. dos CRUZ, C. D. PARENTONI, S. N. GUIMARAES, P. E. de O. GAMA, E. E. G. e SILVA, A. E. de CARVALHO, H. W. L. Inbreeding depression of 28 maize elite open pollinated varieties. |
description |
The study of inbreeding depression is important for breeding strategies such as use of inbred progenies or extraction of inbreed lines. A diallel of 28 maize open-pollinated varieties was evaluated in 10 environments in the early 1990s. At the same time, S1 populations for each of the 28 varieties were evaluated in the same 10 experiments (environments). Yield reductions of the populations from S0 to S1 (mean of the 10 environments), varied from 34.6% (CMS-01) to 59.2% (CMS-30), with an average of 49.1%. Inbreeding depression was greater in populations with a wider genetic base, which had never been exposed to inbreeding (CMS-30, BR-107, PH4, Cunha, Saracura, Nitrodent, and Nitroflint). Inbred lines with greater yield means should be obtained from the BR-105, BR-111, CMS-01, CMS-03, BR-106, CMS-14c, and CMS-28 populations. The use of parameter estimates generated by analysis of inbreeding depression, allow to make inferences about frequencies of deleterious alleles in the population. The frequencies of favorable alleles in the parents can be obtained by diallel analysis. The association of these two types of information, can provide a better interpretation of the genetic parameters and also can improve the process of selection of parents for either an intra- or an inter-populational breeding program. |
author2 |
CLESO ANTONIO PATTO PACHECO, CNPMS; SIDNEY NETTO PARENTONI, CNPMS; PAULO EVARISTO DE O GUIMARAES, CNPMS. |
author_facet |
CLESO ANTONIO PATTO PACHECO, CNPMS; SIDNEY NETTO PARENTONI, CNPMS; PAULO EVARISTO DE O GUIMARAES, CNPMS. PACHECO, C. A. P. SANTOS, M. X. dos CRUZ, C. D. PARENTONI, S. N. GUIMARAES, P. E. de O. GAMA, E. E. G. e SILVA, A. E. de CARVALHO, H. W. L. |
format |
Artigo de periódico |
topic_facet |
Endogamy Maize Diallel. breeding inbreeding depression. |
author |
PACHECO, C. A. P. SANTOS, M. X. dos CRUZ, C. D. PARENTONI, S. N. GUIMARAES, P. E. de O. GAMA, E. E. G. e SILVA, A. E. de CARVALHO, H. W. L. |
author_sort |
PACHECO, C. A. P. |
title |
Inbreeding depression of 28 maize elite open pollinated varieties. |
title_short |
Inbreeding depression of 28 maize elite open pollinated varieties. |
title_full |
Inbreeding depression of 28 maize elite open pollinated varieties. |
title_fullStr |
Inbreeding depression of 28 maize elite open pollinated varieties. |
title_full_unstemmed |
Inbreeding depression of 28 maize elite open pollinated varieties. |
title_sort |
inbreeding depression of 28 maize elite open pollinated varieties. |
publishDate |
2004-12-20 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/488462 |
work_keys_str_mv |
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