Data/hora: 08/06/2024 15:42:24

Biblioteca(s): | Embrapa Florestas; Embrapa Roraima.
Data corrente: | 17/11/2011
Data da última atualização: | 22/10/2019
Autoria: | PEDROZO, C. A.; BARBOSA, M. H. P.; SILVA, F. L. da; RESENDE, M. D. V. de; PETERNELLI, L. A.
Afiliação: | CASSIA ANGELA PEDROZO, CPAF-RR; MARCIO HENRIQUE PEREIRA BARBOSA, UFV; FELIPE LOPES DA SILVA, EPAMIG; MARCOS DEON VILELA DE RESENDE, CNPF; LUIZ ALEXANDRE PETERNELLI, UFV.
Título: | Repeatability of full-sib sugarcane families across harvests and the efficiency of early selection.
Ano de publicação: | 2011
Fonte/Imprenta: | Euphytica, n. 182, p. 423-430, 2011.
Idioma: | Inglês
Conteúdo: | This study was designed to estimate the repeatability coefficient of traits of the plant-cane and first rattoon in a large number of full-sib sugarcane families and to select the superior families based on their predicted genotypic values. The population used in this study consisted of 190 families, and crossing was performed at the Federal University of Alagoas, in Murici, Alagoas, Brazil, in 2007. Five experiments, each with 22 families, took place at the Centro de Pesquisa e Melhoramento da Cana-de-Ac¸u´car (CECA), in Orato´ rios, Minas Gerais, while four experiments, each with 20 families, took place at the Volta Grande mill (VGM), in Conceic¸a˜o das Alagoas, Minas Gerais. Each experiment took the form of a randomized complete block design with six replications. The following traits were determined from the plant-cane and first rattoon: percentage of soluble solids w/w in the juice (Brix), tons of stalks per hectare (TSH) and tons of brix per hectare (TBH). Statistical analyses were performed using the mixed model methodology. Variance components were estimated by restricted maximum likelihood (REML) and the genotypic values of families were predicted by best linear unbiased prediction (BLUP). The moderately high estimates of repeatability for TSH and TBH and the high rates of coincidences of the families selected in both plant-cane and first rattoon indicate that selection of families using repeated measures across the first two harvests combined with individual clone selection at the rattoon stage may be efficient in sugarcane breeding programs, increasing the efficiency of obtaining new cultivars.
Palavras-Chave: | Cana-de-açúcar; Estabilidade temporal; Melhoramento genético; Saccharum sp.

Categoria do assunto:

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F Plantas e Produtos de Origem Vegetal

Registro original: | Embrapa Roraima (CPAF-RR)

Exemplares:

CNPF - (49214-1) - UPC - AP - DD -  -  -  - DIS
CPAF-RR - (13345-1) - UMT - AP - PP - S2011.076 -  - S2011.076 - DIS