Genetic divergence in cocoa progenies for backcrossing program to witches' broom disease resistance

Backcrossing has been little used in cacao breeding, particularly due to the long time required to transfer genes and recover the genetic background of the recurrent parent. The objective of this study was to select individuals, resulting from the backcross CEPEC-42 x SIC-19, genetically related to...

Full description

Saved in:
Bibliographic Details
Published inRevista Ceres Vol. 57; no. 1; pp. 73 - 78
Main Authors Yamada, Milton Macoto, Faleiro, Fábio Gelape, Lopes, Uilson Vanderlei, Flores, Acassi Batista, Pires, José Luis, Melo, Gilson Roberto Pires
Format Journal Article
LanguageEnglish
Published Universidade Federal de Viçosa 01.02.2010
Universidade Federal De Viçosa
Subjects
AGRICULTURE, MULTIDISCIPLINARY
genótipo gráfico
marcador molecular
melhoramento
Retrocruzamento
seleção assistida por marcadores
melhoramento
seleção assistida por marcadores
genótipo gráfico
Retrocruzamento
Backcross
graphical genotype
marcador molecular
molecular markers
marker assisted selection
breeding
Online AccessGet full text

Cover

More Information
Summary:Backcrossing has been little used in cacao breeding, particularly due to the long time required to transfer genes and recover the genetic background of the recurrent parent. The objective of this study was to select individuals, resulting from the backcross CEPEC-42 x SIC-19, genetically related to the recurrent parent SIC-19 by using RAPD molecular markers, among those with resistance to witches' broom. Of the 31 plants that clustered with SIC-19, 18 from the replanted material remained free of the disease in the field, with good vegetative aspect and, therefore can be used for backcross to reach the desired objective. O retrocruzamento tem sido pouco usado no melhoramento do cacaueiro, particularmente devido ao longo tempo requerido para transferir genes e recuperar o genoma do pai recorrente. O objetivo deste estudo foi selecionar indivíduos resultantes do retrocruzamento de CEPEC-42 x SIC-19, geneticamente relacionado ao pai recorrente SIC 19 por meio do uso de marcador molecular RAPD, dentre aqueles com resistência à vassoura-de-bruxa. Das 31 plantas que agruparam com SIC-19, 18 das replantadas permanecem sem a vassoura-de-bruxa no campo, com bom aspecto vegetativo. Essas 18 plantas podem ser usadas em retrocruzamento para alcançar o objetivo desejado.
ISSN:0034-737X
2177-3491
0034-737X
DOI:10.1590/S0034-737X2010000100013