Selection processes in a citrus hybrid population using RAPD markers
The objective of this work was to evaluate the processes of selection in a citrus hybrid population using segregation analysis of RAPD markers. The segregation of 123 RAPD markers between 'Cravo' mandarin (Citrus reticulata Blanco) and 'Pêra' sweet orange (C. sinensis (L.) Osbeck) was analysed in a F1 progeny of 94 hybrids. Genetic composition, diversity, heterozygosity, differences in chromosomal structure and the presence of deleterious recessive genes are discussed based on the segregation ratios obtained. A high percentage of markers had a skeweness of the 1:1 expected segregation ratio in the F1 population. Many markers showed a 3:1 segregation ratio in both varieties and 1:3 in 'Pêra' sweet orange, probably due to directional selection processes. The distribution analysis of the frequencies of the segregant markers in a hybrid population is a simple method which allows a better understanding of the genetics of citrus group.
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Embrapa Secretaria de Pesquisa e Desenvolvimento
2003
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oai:scielo:S0100-204X20030011000072004-05-06Selection processes in a citrus hybrid population using RAPD markersOliveira,Roberto Pedroso deAguilar-Vildoso,Carlos IvanMachado,Marcos Antônio Citrus reticulata Citrus sinensis segregation genetic markers The objective of this work was to evaluate the processes of selection in a citrus hybrid population using segregation analysis of RAPD markers. The segregation of 123 RAPD markers between 'Cravo' mandarin (Citrus reticulata Blanco) and 'Pêra' sweet orange (C. sinensis (L.) Osbeck) was analysed in a F1 progeny of 94 hybrids. Genetic composition, diversity, heterozygosity, differences in chromosomal structure and the presence of deleterious recessive genes are discussed based on the segregation ratios obtained. A high percentage of markers had a skeweness of the 1:1 expected segregation ratio in the F1 population. Many markers showed a 3:1 segregation ratio in both varieties and 1:3 in 'Pêra' sweet orange, probably due to directional selection processes. The distribution analysis of the frequencies of the segregant markers in a hybrid population is a simple method which allows a better understanding of the genetics of citrus group.info:eu-repo/semantics/openAccessEmbrapa Secretaria de Pesquisa e DesenvolvimentoPesquisa Agropecuária BrasileiraPesquisa Agropecuária Brasileira v.38 n.11 20032003-11-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003001100007en10.1590/S0100-204X2003001100007 |
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Oliveira,Roberto Pedroso de Aguilar-Vildoso,Carlos Ivan Machado,Marcos Antônio |
| spellingShingle |
Oliveira,Roberto Pedroso de Aguilar-Vildoso,Carlos Ivan Machado,Marcos Antônio Selection processes in a citrus hybrid population using RAPD markers |
| author_facet |
Oliveira,Roberto Pedroso de Aguilar-Vildoso,Carlos Ivan Machado,Marcos Antônio |
| author_sort |
Oliveira,Roberto Pedroso de |
| title |
Selection processes in a citrus hybrid population using RAPD markers |
| title_short |
Selection processes in a citrus hybrid population using RAPD markers |
| title_full |
Selection processes in a citrus hybrid population using RAPD markers |
| title_fullStr |
Selection processes in a citrus hybrid population using RAPD markers |
| title_full_unstemmed |
Selection processes in a citrus hybrid population using RAPD markers |
| title_sort |
selection processes in a citrus hybrid population using rapd markers |
| description |
The objective of this work was to evaluate the processes of selection in a citrus hybrid population using segregation analysis of RAPD markers. The segregation of 123 RAPD markers between 'Cravo' mandarin (Citrus reticulata Blanco) and 'Pêra' sweet orange (C. sinensis (L.) Osbeck) was analysed in a F1 progeny of 94 hybrids. Genetic composition, diversity, heterozygosity, differences in chromosomal structure and the presence of deleterious recessive genes are discussed based on the segregation ratios obtained. A high percentage of markers had a skeweness of the 1:1 expected segregation ratio in the F1 population. Many markers showed a 3:1 segregation ratio in both varieties and 1:3 in 'Pêra' sweet orange, probably due to directional selection processes. The distribution analysis of the frequencies of the segregant markers in a hybrid population is a simple method which allows a better understanding of the genetics of citrus group. |
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Embrapa Secretaria de Pesquisa e Desenvolvimento |
| publishDate |
2003 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003001100007 |
| work_keys_str_mv |
AT oliveirarobertopedrosode selectionprocessesinacitrushybridpopulationusingrapdmarkers AT aguilarvildosocarlosivan selectionprocessesinacitrushybridpopulationusingrapdmarkers AT machadomarcosantonio selectionprocessesinacitrushybridpopulationusingrapdmarkers |
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