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

Yamada, Milton Macoto; Pires, José Luís; Faleiro, Fábio Gelape; Lopes, Uilson Vanderlei; Macedo, Mariosvaldo Morais

doi:10.1590/s0034-737x2013000400010

Cited by 10 publications

(5 citation statements)

References 3 publications

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“…In the Scott-Knott test, the genotype distinction formed four resistance groups to witches' broom, with average values of dry broom per plant ranging from none to more than 55 (Table 1), suggesting the existence of different resistance levels. The dry broom count per plant has already been established as an appropriate parameter for assessing resistance to witches' broom and has been used frequently (Silva et al 2010;Yamada et al 2013).…”

Section: Resultsmentioning

confidence: 99%

Resistance to witches’ broom in adult plants and progeny of local varieties of cacao in Southern Bahia

et al. 2020

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Plants of local cacao variety from Southern Bahia were evaluated in order to verify if there are different levels of resistance to witches' broom disease in the study population and if the evaluation of adult plants in the field is a good predictor of these resistance levels. The seedlings were maintained under greenhouse conditions and inoculated with the fungus Moniliophthora perniciosa. Evaluations of symptoms occurred 60 days after inoculation. In the field, the same genotypes were evaluated by counting the number of dry brooms per plant, per year, and assessing trunk diameter size. The data were subjected to analysis of variance and averages grouped by the Scott-Knott test, differentiated by Tukey's test and compared by Student's T test. The Scavina-6 and CCN51 clones as well as the Catongo variety were used as resistance, moderate resistance and susceptibility patterns, respectively. Twenty-eight percent of the genotypes were among the most resistant and the genotypes 4119 and 4033 were considered the most susceptible to the disease in both field and greenhouse evaluations. Field evaluation was promising as a predictor of resistance level. The selected materials presented good characteristics for witches' broom resistance, with different levels deserving special attention in the context of reducing the vulnerability of Brazilian cacao cultivation to the effects of the disease, especially in the cacao region of Bahia.

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Section: Resultsmentioning

confidence: 99%

Resistance to witches’ broom in adult plants and progeny of local varieties of cacao in Southern Bahia

et al. 2020

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“…Many high yielder plants have been selected in this trial for further tests as clones in regional trials, particularly in the progenies of RB 39 x CCN 51, CEPEC 94 x CCN 10, PA 169 x CCN 10 and CCN 10 x VB 1151 (Yamada et al, 2013). However, as shown in this study these progenies a high number of dead plants, except in the cross CCN 10 x VB 1151( Table 2).…”

Section: Resultsmentioning

confidence: 73%

“…Considering the results of the present work, it could be recommended the cross TSH 1188 x VB 1151 as rootstock (very low % of dead plants). However, restriction should be made because under field conditions, this was the progeny with the highest production of vegetative and cushion brooms in the experiment (Yamada et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

Genetic Parameters and Resistance of Cacao Progenies to Ceratocystis Wilt Under Natural Infection

Yamada¹,

Faleiro²,

Lopes³

et al. 2015

Agrotropica

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The objective of this study was to evaluate the resistance to the fungus Ceratocystis cacaofunesta, causing Ceratocystis wilt, a lethal disease of cacao. In March 2005, in the Joaquim Bahiana Experimental Station (ESJOB) of the Cocoa Research Center (Cepec) located in the municipality of Itajuípe, Bahia, Brazil was an experiment installed in the field with progenies of 27 crosses arranged in randomized blocks with spacing of 3x3 meters with plots of 30 plants and four repetitions, with a total of 120 plants /crosses. The plants of progenies from 27 crosses were evaluated in relation to disease, and, in October 2012, data of the incidence of dead plants were subjected to analysis of variance and heritability. The mean disease incidence ranged from 0.83 to 51.66%, while the overall mean was 16.19% of dead plants. Progenies showed significant differences in incidence and resistance to Ceratocystis wilt. Natural selection performed in this experiment for resistance to Ceratocystis cacaofunesta was efficient considering the high heritability (h2 = 0.92) and the value of the relationship CVg / CVe = 1.71.Parâmetros genéticos e resistência das progênies de cacaueiro à murcha de ceratocystis em condições naturais. O objetivo deste trabalho foi avaliar a resistência do fungo Ceratocystis cacaofunesta, que causa a murcha de ceratocystis, doença letal do cacaueiro. Em março de 2005, na Estação Experimental Joaquim Bahiana do Centro de Pesquisas do Cacau (Cepec), situada no município de Itajuípe, Bahia, Brasil foi instalado no campo um experimento com progênies de 27 cruzamentos dispostos em blocos ao acaso no espaçamento de 3x3 metros com parcelas de 30 plantas e 4 repetições, totalizando 120 plantas/cruzamento. As plantas das progênies dos 27 cruzamentos foram avaliadas em relação à doença, e, em outubro de 2012, os dados da incidência de plantas mortas foram submetidos à análise de variância e da herdabilidade. As médias de incidência da doença variaram de 0,83 a 51,66%, enquanto que a média geral do experimento foi 16,19% de plantas mortas. As progênies mostraram diferenças significativas de resistência e incidência à murcha de ceratocystis. A seleção natural realizada nas condições deste experimento para resistência a Ceratocystis cacaofunesta foi eficiente, considerando a alta herdabilidade (h2 =0,92) e o valor da relação CVg/CVe = 1,71. Palavras-chave:Theobroma cacao L., murcha de ceratocystis, seleção natural, variância, herdabilidade.Recebido para publicação em 16 de julho de 2014. Aceito em 02 de dezembro de 2015. 215 Agrotrópica 27 (3): 215 -218. 2015.

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“…The breeding program aims to develop new commercial cocoa varieties with high productivity, good general characteristics and greater resistance to diseases, and its central structures are recurrent selection processes for the association of genes and traits of interest. These processes are followed by regional trials of clones selected in the recurrent selection populations, for the final evaluation and selection of the new varieties (Lopes et al, 2011) This article contemplates the evaluation, for vegetative brooms (VB) and cushion brooms (CB), of some of the first generation progenies of the recurrent selection program in progress at Cepec, and similar works have already been presented by Albuquerque et al, 2009, Yamada et al, 2013, Benjamin et al, 2016, Benjamin et al, 2014 It has the hypothesis that there are differences among progenitors for resistance to witches' broom disease and differences in additive and non-additive effects on the inheritance, differences among progenitors and among progenies for the tendencies in the evolution of the number of brooms over the time, and that it is possible to increase the level and durability of resistance through the association of alleles or genes favorable to this character.…”

Section: Introductionmentioning

confidence: 99%

Resistance of cocoa to Moniliophthora perniciosa – progenitors and progenies selection

Pires¹,

Melo²,

Yamada³

et al. 2022

Rev. Ceres

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Witches' broom, caused by Moniliophthora perniciosa, is the most important cacao disease in Brazil, and the final objective of this study is increasing the level and durability of resistance to this fungus, through the association of different alleles or genes favorable to the character, for the generation of new cocoa varieties. It was conducted, for 10 years, the evaluation of the number of vegetative brooms and cushions brooms per plant, of progenies from a cross breeding scheme in North Carolina II design, with the clones:

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

Cited by 10 publications

References 3 publications

Resistance to witches’ broom in adult plants and progeny of local varieties of cacao in Southern Bahia

Resistance to witches’ broom in adult plants and progeny of local varieties of cacao in Southern Bahia

Genetic Parameters and Resistance of Cacao Progenies to Ceratocystis Wilt Under Natural Infection

Resistance of cocoa to Moniliophthora perniciosa – progenitors and progenies selection

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