Data/hora: 24/06/2024 19:45:49

Biblioteca(s): | Embrapa Arroz e Feijão.
Data corrente: | 07/10/2004
Data da última atualização: | 12/07/2007
Autoria: | CARVALHO, C. G. P. de; CRUZ, C. D.; ALMEIDA, C. M. V. C. de; MACHADO, P. F. R.
Título: | Yield repeatability and evaluation period in hybrid cocoa assessment.
Ano de publicação: | 2002
Fonte/Imprenta: | Crop Breeding and Applied Biotechnology, Londrina, v. 2, n. 1, p. 149-156, Mar. 2002.
Idioma: | Inglês
Conteúdo: | Repeatability estimates were obtained from an experiment carried out in Rondônia state to define the evaluation period necessary to discriminate between cocoa hybrid yields. Data collection involved these traits: total number of fruits harvested (TNFC), total number of healthy fruits (TNHF), total weight of fresh seeds (TWFS), mean weight of fresh seeds per fruit (MNFSF), percentage of wasted fruits (SPWF) and percentage of wasted fruits due to witches' broom disease (PWFWB). Repeatability estimates wete hight for the two last traits (values above 0.8) but were relatively low (lower than 0.65) for the others when the ANOVA estimation was performed or data collected at maturity. These estimates indicated that three evaluation are necessary from the 8th year after planting for efficient selection (accuracy > 70%) for all the assessed traits. When the average of the assessments carried out in two pre-climax years was considered, it was possible to obtain a correlation greater than 0.70 between thed real hybrid value and the traits total number of fruits collected and percentage of wasted fruits.
Palavras-Chave: | Rondônia.
Thesagro: | Cacau; Hibrido; Melhoramento; Theobroma Cacao.
Thesaurus Nal: | breeding; yield components.
Categoria do assunto: | --
Registro original: | Embrapa Arroz e Feijão (CNPAF)
Exemplares: | CNPAF - (21696-1) - ADD - AP - -- - 631.05 - C - 2004.00064 - DIS