Variability in cacao selected by producers for resistance to witches´ broom based on microsatellite markers

Faleiro, A. S. G.; Faleiro, Fábio Gelape; Lopes, Uilson Vanderlei; Melo, Gilson Roberto Pires; Monteiro, Wilson Reis; Yamada, Milton Macoto; Bahia, Rita C.S; Corrêa, Ronan Xavier

doi:10.12702/1984-7033.v04n03a05

Cited by 9 publications

(6 citation statements)

References 8 publications

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“…The heterozygosity ranged from 20% to 86% (Table1), and in 79% more than 50% loci were heterozygous. This value is high, compared with other reports (Faleiro et al 2004, Yamada et al 2003, Bertolde 2007. Clone ICS 95 was one of the least, and EET 62 and TSH 1188 were the most heterozygous.…”

Section: Resultscontrasting

confidence: 49%

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Microsatellite diversity and heterozygosity of parents of a cocoa breeding population

Yamada¹,

Faleiro²,

Flores³

et al. 2009

CBAB

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-The purpose of this study was to determine the genetic diversity and heterozygosity of 26 clones used as parents of 27 families. The populations are being evaluated by the Comissão Executiva do Plano da Lavoura Cacaueira (CEPLAC), in the state of BA. Nine of these clones are currently being recommended to farmers, while six others were used as control. The seven microsatellite generated 52 alleles with a mean of seven alleles/locus and genetic distance ranging from 0.17 to 0.90. This indicates a wide distribution of accessions and high variability. The heterozygosity ranged from 20% to 86%, and more than 50% of the loci were heterozygous in 79% of the clones. Although the selection of the parents for populations was not based on genetic distances, the high genetic diversity and heterozygosity of parents indicate highly segregating populations that make the selection of trees of interest possible, due to the variability.

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Section: Resultscontrasting

confidence: 49%

“…Recently, Bertolde (2007) demonstrated the high genetic diversity in 38 recommended clones using microsatellite markers. In farm selections Faleiro et al (2004) found that 50% of the clones had over 50% heterozygous loci. In the Parinari population, Yamada et al (2003) found a heterozygosity of over 50% in about 40% of the accessions.…”

Section: Introductionmentioning

confidence: 99%

Microsatellite diversity and heterozygosity of parents of a cocoa breeding population

Yamada¹,

Faleiro²,

Flores³

et al. 2009

CBAB

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“…Furthermore, it was necessary constant characterization of selected materials in the cacao region of Bahia, in order to identify genotypes with genes linked to resistance, with the aim of obtaining varieties with more durable resistance (Faleiro et al 2004). …”

Section: Cs Benjamin Et Almentioning

confidence: 99%

Cacao families and parents selected as resistant to natural infection of Moniliophthora perniciosa

Benjamin

Luz

Santos

et al. 2016

Crop Breed. Appl. Biotechnol.

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“…While Sca-6 and IMC-67 were frequently involved in hybrid (full-sib families) varieties released by Ceplac to farmers before the witches´ broom arrival (Yamada and Lopes, 1999;Faleiro et al, 2004), P-18 was never used. Therefore, it is not expected finding, in farmer fields, plants with the incompatibility allele of the clone P-18, unless this allele was present in other clones involved in the production of those hybrids.…”

Section: Resultsmentioning

confidence: 99%

Origin of the Incompatibility Allele Carried by the Cacao Clone TSH-1188

Lopes¹,

Santos²,

Silva³

et al. 2015

Agrotropica

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The sexual incompatibility is a limiting factor for the expression of the potential yield in cacao. However, because of other genes of interest present in self-incompatible clones (as yield and disease resistance) breeders have frequently used them in their programs. One of these clones is the TSH-1188 which, besides being recommended for planting in Bahia, Brazil, it was widely used in Ceplac´s (Executive Comission of the Cacao Farming Plan) breeding program in the recent past. However, this clone has a rare incompatibility allele of unknown origin. The objective of this paper was to clarify the origin of this allele, by crossing that clone with others in its pedigree, aiming to support studies of gene mapping, as well as planning crosses and establishing this clone in farms. It was shown that the incompatibility allele present in TSH-1188 comes from the clone P-18.Key words: sexual incompatibility, inheritance, Theobroma cacao L.Origem do alelo de incompatibilidade presente no clone de cacau TSH-1188. A incompatibilidade sexual é um fator limitante da expressão da produção potencial do cacaueiro. Entretanto, por causa de outros genes de interesse presentes em clones autoincompatíveis (como produtividade e resistência a doenças), melhoristas têm frequentemente usado os mesmos em seus programas. Um destes clones é o TSH-1188, que além de ser recomendado para plantio na Bahia, Brasil, foi amplamente usado no programa de melhoramento da Ceplac (Comissão Executiva do Plano da Lavoura Cacaueira) no passado recente. Entretanto, este clone tem um alelo raro de incompatibilidade, de origem desconhecida. O objetivo deste artigo foi esclarecer a origem deste alelo, através de cruzamentos daquele clone com outros em seu pedigree, visando dar suporte a estudos de mapeamento de genes, bem como ao planejamento de cruzamentos e estabelecimento deste clone em fazendas. Mostrou-se que o alelo de incompatibilidade presente no TSH-1188 vem do clone P-18.

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Variability in cacao selected by producers for resistance to witches´ broom based on microsatellite markers

Cited by 9 publications

References 8 publications

Microsatellite diversity and heterozygosity of parents of a cocoa breeding population

Microsatellite diversity and heterozygosity of parents of a cocoa breeding population

Cacao families and parents selected as resistant to natural infection of Moniliophthora perniciosa

Origin of the Incompatibility Allele Carried by the Cacao Clone TSH-1188

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