Produção Nacional
Revisado por pares
Seleção antecipada de progênies de café descendentes de “híbrido de timor” X “catuaí amarelo” e “catuaí vermelho”
2004; Editora da Universidade Estadual de Maringá (Eduem); Volume: 26; Issue: 1 Linguagem: Inglês
10.4025/actasciagron.v26i1.1969
ISSN1807-8621
AutoresPaulo Bonomo, Cosme Damião Cruz, José Marcelo Soriano Viana, Antônio Alves Pereira, V. R. Oliveira, Pedro Crescêncio Souza Carneiro,
Tópico(s)Sugarcane Cultivation and Processing
ResumoThis research observed four methods to evaluate the efficiency of the early selection for yield correlations among: annual production, accumulated production and repeatability coefficient, which quantifies the genotype relative position consistency during the successive evaluations. Twenty eight progenies of Coffea Arabica in F3 generation were used, originated from crossings among the “Híbrido de Timor” descendants and cultivars of “Catuaí Amarelo” and “Catuaí Vermelho”. The complete randomized block design was used with six replications and four plants per plot and data were obtained in four initial harvests. The repeatability (r) of bean yield was higher, on the average, and showed a narrow range among estimates (r=0.39 to 0.48), when considering the 2nd, 3rd and 4th combined harvests. Among the methods used to estimate the repeatability coefficient, the main component technique based on the phenotypic correlation matrix was the most adequate, and resulted r=0.48 as well as a determination coefficient of 0.74. Therefore, an early selection needs great care. The correlations indicate that one could start such selection from the second harvest on, using a softer selection
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