02586naa a2200277 a 450000100080000000500110000800800410001902400520006010000210011224501790013326000090031252016630032165000260198465000230201065000130203365000270204665300270207365300390210065300190213970000190215870000170217770000170219470000290221170000190224077300490225921482752022-11-23       2022    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1007/s10681-022-03126-52DOI1 aCHAVES, S. F. S.  aLeveraging multi-harvest data for increasing genetic gains per unit of time for fruit yield and resistance to witches' broom in Theobroma grandiflorum.h[electronic resource]  c2022  aTheobroma grandiflorum is a perennial fruit-bearing species with a long breeding cycle (~ 12 years). In multi-harvest data analyses, one frequently observes heteroscedasticity and genetic/statistical imbalance, which requires adequate statistical methods. This study aimed to (i) compare multiharvest models with homogenous and heterogeneous residual variance, (ii) define the optimal number of harvests for an accurate genetic selection of T. grandiflorum genotypes, and (iii) select T. grandiflorum hybrid families with high fruit yield and resistance to witches? broom using an additive index. We used a generalized linear mixed model to analyse the resistance to witches? broom. The data refers to anunbalanced trial with 34 triple-cross hybrid families, arranged in a randomized complete block design. We evaluated these families throughout 9 consecutive harvest years regarding fruit yield and resistance to witches? broom. The variance components, genetic parameters and genotypic values were estimated/predicted through residual maximum likelihood/best linear unbiased prediction methodologies. The model with heterogeneous residuals had a better fit than the homogeneous model for the fruit yield trait, according to Akaike information criterion. The results attest to the genetic variability in the evaluated population. To select the best individual for the next breeding cycle, three harvests are enough for selecting accurately for fruit yield and resistance to witches? broom. For commercial release, nine harvests are necessary for both traits. We identified ten high-performance families regarding fruit yield and resistance to witches? broom  aQuantitative genetics  aÁrvore Frutífera  aCupuaçu  aTheobroma Grandiflorum  aGenética quantitativa  aInteração genótipo por colheita  aModelos mistos1 aDIAS, L. A. S.1 aALVES, R. S.1 aALVES, R. M.1 aEVANGELISTA, J. S. P. C.1 aDIAS, K. O. G.  tEuphyticagv. 218, Article number 171, 2022.