Data/hora: 22/06/2024 04:41:16

Biblioteca(s): | Embrapa Semiárido.
Data corrente: | 30/09/2021
Data da última atualização: | 16/12/2021
Autoria: | FERREIRA, G. de O.; SANTOS, C. A. F.; ALENCAR, J. A. de; SILVA, D. O. M. da.
Afiliação: | GLEYCE DE OLIVEIRA FERREIRA, Universidade Estadual de Feira de Santana; CARLOS ANTONIO FERNANDES SANTOS, CPATSA; JOSE ADALBERTO DE ALENCAR, CPATSA; DANILLO OLEGÁRIO MATOS DA SILVA, Uninassau Petrolina.
Título: | Recurrent selection for resistance to Thrips tabaci in a tropical onion population.
Ano de publicação: | 2021
Fonte/Imprenta: | Australian Journal of Crop Science, v. 15, n. 4, p. 538-542, 2021.
DOI: | 10.21475/ajcs.21.15.04.p2827
Idioma: | Inglês
Conteúdo: | Recurrent selection for resistance to onion Thrips tabaci has not been well studied by breeding programmes. Onion thrips is a pest of major concern and is controlled by insecticide spraying, raising production costs and potentially damaging the environment. This study aimed to estimate onion bulb yield genetic gain through six cycles in the ‘BRS Alfa São Francisco’ developed by recurrent selection for T. tabaci resistance. Experiments were carried out in a randomised block design, with three replications, in two locations. The degree of infestation in plants was evaluated five times after transplanting, as well as plant architecture traits and bulb yield. The latest selection cycle presented bulb commercial yield of 32.1 t.ha-1 , while the base population ‘Alfa Tropical’ and IPA 10 check cultivar 15.9 and 14.0 t.ha -1, respectively (p<0.01). The broad sense heritability values ranged from 0.65 to 0.74 for bulb yield. The mean genetic gain was 1.0 t.ha-1 or 6% per selection cycle, indicating the efficiency of the method to increase the frequency of favourable alleles for thrips resistance and the possibility of onion cultivation in the total absence of insecticide applications to control this pest, or a reduction in their number.
Palavras-Chave: | Herdabilidade; Resposta de seleção.
Thesagro: | Allium Cepa; Cebola; Doença; Melhoramento Genético Vegetal; Praga.
Thesaurus Nal: | Thrips tabaci.
Categoria do assunto: | G Melhoramento Genético
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/226516/1/Recurrent-selection-for-resistance-2021.pdf
Registro original: | Embrapa Semiárido (CPATSA)
Exemplares: | CPATSA - (59639-1) - UPC - AP - DD -  -  -  - DIS