Microsatellite diversity and heterozygosity of parents of a cocoa breeding population

Yamada, Milton Macoto; Faleiro, F. G.; Flores, Acassi Batista; Lopes, Uilson Vanderlei; Pires, José Luís; Corrêa, Ronan Xavier; Santos, R. F.

doi:10.12702/1984-7033.v09n01a03

Cited by 9 publications

(7 citation statements)

References 5 publications

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“…Cluster 8 CEPEC42xSIC19 al., 2006) and the high genetic distances and heterozygosity among the parents involved in those crosses as shown in previous studies (Yamada et al, 2009b).…”

Section: Resultssupporting

confidence: 69%

Agronomic performance of 27 cocoa progenies and plant selection based on productivity, self-compatibility and disease resistance

et al. 2013

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RESUMO Desempenho agronômico de 27 progênies de cacaueiro e seleção de plantas com base na produtividade, autocompatibilidade e resistência a doençasEste trabalho teve o objetivo de avaliar 27 progênies de cruzamentos de cacaueiro, de acordo com as características agronômicas e, dentro destas, selecionar plantas F1 superiores. O experimento foi instalado em Março de 2005, na Estação Joaquim Bahiana (ESJOB), no município de Itajuípe, Bahia. A área do experimento é de aproximadamente 3 ha, com total de 3240 plantas. Foram realizadas 13 avaliações de vassoura vegetativa, cinco avaliações de vassoura de almofada e 15 avaliações do número de frutos/planta. Foram feitas 30 polinizações em cada planta selecionada, para testar sua autocompatibilidade. Os dados de produção, baseados no número de frutos por planta e na resistência à vassoura-de-bruxa, indicaram o CEPEC 94 x CCN 10, RB 39 x CCN 51 e CCN 10 x VB 1151 como progênies superiores. Todas as seleções testadas foram autocompatíveis. A análise de dados de progênies e de plantas individuais, associada a observações visuais no campo, permitiu a seleção de 17 plantas, que foram incluídas em uma rede de testes de ensaios regionais, para determinar a estabilidade fenotípica Palavras-chave: Theobroma cacao, clones, híbridos, genética e melhoramento. Agronomic performance of 27 cocoa progenies and plant selection based on productivity, self-compatibility and disease resistanceThe objective of the present work was to evaluate 27 progenies of cocoa crosses considering the agronomic traits and select F1 plants within superior crosses. The experiment was installed in March 2005, in the Experimental Station Joaquim Bahiana (ESJOB), in Itajuipe, Bahia. The area of the experiment is of approximately 3 ha, with a total of 3240 plants. Thirteen evaluations of vegetative brooms, five of cushion brooms and 15 of number of pods per plant were accomplished. Thirty pollinations were made for each selected plant to test for self-compatibility. The production, based on the number of pods per plant, and resistance to witches´ broom indicated CEPEC 94 x CCN 10, RB 39 x CCN 51 and CCN 10 x VB 1151 as superior progenies. All selections tested were self-compatible. The analyses of progenies and individual tree data, associated to visual field observations, allowed the selection of 17 plants which were included in a network of regional tests to determine the phenotypic stability.

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“…Cluster 8 CEPEC42xSIC19 al., 2006) and the high genetic distances and heterozygosity among the parents involved in those crosses as shown in previous studies (Yamada et al, 2009b).…”

Section: Resultssupporting

confidence: 69%

Agronomic performance of 27 cocoa progenies and plant selection based on productivity, self-compatibility and disease resistance

et al. 2013

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“…Out of this, only the clones Canellos and P18 were not found in the germoplasm collection of MCCS. In previous studies based on SSR markers, it was shown that the clones TSH 1188 and CCN 51 have higher heterozygosity than clones involve in their genealogy; also, the genetic clustering are consistent with the genealogy of this material [11].…”

Section: Methodssupporting

confidence: 69%

Inheritance of the Number of Ovules per Ovary and Selection of Cacao Genotypes

Bahia¹,

Corrêa²,

Santos³

et al. 2013

AJPS

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We have characterized the number of ovules per ovary (NoOV) in cacao plants originated from crossing the clones CCN 51 and TSH 1188 (segregating progeny) and determined the heritability of this characteristic in order to select plants with higher NoOV in this progeny. The NoOV was calculated as the average of 10 flowers per plant and ranged from 44.8 to 58.6 between the six clones (two parents and four clones belonging to their genealogy). In the progeny (n = 209 plants) the NoOV averaged 54.3 (range 44.1 to 67.8). The NoOV was distributed uniformly among the progeny indicating that this trait is conditioned by polygenes. Its heritability was estimated at 67.7%. The 32 plants with NoOV similar or superior to the genitor CCN 51 (highest amount among clones) were selected for use in the genetic improvement program. We showed that this population is suitable for genetic mapping, molecular marker identification and selection of superior cacao genotypes.

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“…The distribution of clones Sca6, ICS1, TSH516 and SIC19 in the groups based on the means of the ScottKnott test, evidences the efficiency of clone Sca6, parent of the F 2 population, as resistance standard (Table 3, Figure 2). The ICS1clone, parent of the population and susceptibility standard (Yamada et al 2009), and SIC19, considered a susceptibility standard, were assigned to the group of intermediate resistance (cluster C). In the studied population, the susceptibility to the pathogen of 82 genotypes in the clusters D and E was greater than of the two control clones (ICS1 and SIC19) ( Table 3).…”

Section: Resistance Gradient Of Cacao To Phytophthora Palmivoramentioning

confidence: 99%

Resistance gradient of black pod disease in cocoa and selection by leaf disk assay

Santos

Cerqueira-Silva

Clément

et al. 2011

Crop Breed. Appl. Biotechnol.

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Microsatellite diversity and heterozygosity of parents of a cocoa breeding population

Cited by 9 publications

References 5 publications

Agronomic performance of 27 cocoa progenies and plant selection based on productivity, self-compatibility and disease resistance

Agronomic performance of 27 cocoa progenies and plant selection based on productivity, self-compatibility and disease resistance

Inheritance of the Number of Ovules per Ovary and Selection of Cacao Genotypes

Resistance gradient of black pod disease in cocoa and selection by leaf disk assay

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