Journal
PLANT CELL
Volume 26, Issue 9, Pages 3616-3629Publisher
OXFORD UNIV PRESS INC
DOI: 10.1105/tpc.114.130112
Keywords
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Funding
- Gordon and Betty Moore Foundation Life Sciences Research Fellowship
- Spanish Ministry of Science
- National Science Foundation [IOS-0820854]
- Direct For Biological Sciences [0820854] Funding Source: National Science Foundation
- Division Of Integrative Organismal Systems [0820854] Funding Source: National Science Foundation
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Leaf shape is mutable, changing in ways modulated by both development and environment within genotypes. A complete model of leaf phenotype would incorporate the changes in leaf shape during juvenile-to-adult phase transitions and the ontogeny of each leaf. Here, we provide a morphometric description of >33,000 leaflets from a set of tomato (Solanum spp) introgression lines grown under controlled environment conditions. We first compare the shape of these leaves, arising during vegetative development, with >11,000 previously published leaflets from a field setting and >11,000 leaflets from wild tomato relatives. We then quantify the changes in shape, across ontogeny, for successive leaves in the heteroblastic series. Using principal component analysis, we then separate genetic effects modulating (1) the overall shape of all leaves versus (2) the shape of specific leaves in the series, finding the former more heritable than the latter and comparing quantitative trait loci regulating each. Our results demonstrate that phenotype is highly contextual and that unbiased assessments of phenotype, for quantitative genetic or other purposes, would ideally sample the many developmental and environmental factors that modulate it.
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