Repeatability and number of growing seasons for the selection of custard apple progenies
2011
Julio César Do Vale | Paulo Sérgio Lima e Silva | Gustavo Sessa Fialho | Keny Henrique Mariguele | Roberto Fritsche-Neto
This study aimed to estimate the repeatability coefficient and determine the minimum number of samplesrequired for effective selection for yield of custard apple. Twenty progenies were evaluated in randomized blocks, fivereplications and four plants per plot. The fruits were collected, counted and weighed every two days of the year. Estimates ofthe repeatability coefficients were obtained by the methods of analysis of variance - ANOVA and principal components - PC.The estimates from the repeatability analysis of biennial data are higher than those based on individual years. The estimatesof the PC method were accurate even in the first harvest, unlike ANOVA. Four biennia were sufficient to ensure effectiveprogeny selection of custard apple.
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