Maternal and carryover effects on early growth of Eucalyptus globulus

By G. Lopez, Brad M. Potts, R. Vaillancourt, L. Apiolaza. 2003

83 citations recorded by the source corpus.

Maternal and nonmaternal reciprocal effects were compared with nuclear genetic and carryover effects using a diallel mating amongst eight Eucalyptus globulus Labill. wild parents from northeastern and southern Tasmania races. Seed mass exhibited a significant maternal effect, increasing seed germinative capacity but not germination rate. After accounting for variation in seed mass, both germinative capacity and germination rate exhibited significant reciprocal effects, but these were non maternal in origin. Rapid germination and large seeds resulted in significantly larger seedlings in the nursery, but these carryover effects diminished with age. In contrast, the expression of genetic effects increased with age. Significant additive genetic variation was detected for growth by age 3 years and significant reciprocal differences were detected at the race level after 2 years in field trials. If common, such reciprocal effects could bias genetic parameters and impact on the choice of cross-direction in deployment programs. Failure to account for carryover effects in genetic analyses may inflate estimates of genetic variation for growth during early stages of the life cycle.

Subfields: Environmental Chemistry, Nature and Landscape Conservation, Plant Science

View Paper: https://www.semanticscholar.org/paper/c0f065c286a695e5891cb5a9e414d2b9b7a7245c

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In Nature and Landscape Conservation

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Citations in the corpus

Very early selection for solid wood quality: screening for early winners (2009, background): “Lopez et al. (2003) also show the variation of maternal effects with age.”
Age trends in genetic parameters for growth and wood density in Eucalyptus globulus (2010, background): “Lopez et al. (2003) reported an increase in the expression of additive genetic variation for height growth of E. globulus from the nursery to the last measurement in the field at 16 months of age, by which time significant additive genetic effects were detected, whereas maternal and nursery effects…”
Population differences in juvenile survival under increasing drought are mediated by seed size in cork oak (Quercus suber L.). (2009, background): “Arguments for the adaptive value of seed size should also consider that although seed size promotes survival during early growth of progeny, its influence diminishes considerably with age (Schaal, 1984; Roach and Wulff, 1987; Lopez et al., 2003 ).”