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- W3119182201 abstract "Premise of research. A trade-off between seed mass and seed output defines a central axis of ecological variation among plant species. While an observed negative seed mass–seed output relationship is hypothesized to reflect universal constraints on resource allocation in all plants, domestication has likely altered this relationship.Methodology. I use a data set of seed mass and seed output (measured on a per-plant basis) for 41 of the world’s most widespread crops and 1190 wild plant species to evaluate whether and how domestication has influenced seed mass–seed output relationships in crops. I do so by evaluating (i) whether crops differ systematically from wild plants in terms of their position along a seed mass–seed output axis (assessed using standardized major axis regression models) and (ii) whether crops influence the phylogenetic signals in seed mass and seed output observed among plants (assessed using phylogenetic analyses of Pagel’s λ coupled with randomization tests).Pivotal results. Compared with patterns among wild plants, virtually all crops express higher seed mass for a given seed output. This trend is especially pronounced and statistically significant in crops that have been selected for seed production, though the pattern is also pronounced and statistically significant across nonseed crops. The strength of the phylogenetic signal in seed mass and seed output—which is strong and statistically significant across all plants in the data set—was reduced when crops were included in the analyses.Conclusions. Evolved relationships between seed mass and seed output in plants are influenced by both conscious and unconscious artificial selection, such that artificial selection relaxes strong constraints on trait trade-offs within crops as compared with wild plants. These differences represent a key aspect of how the functional biology of crops differs fundamentally from that of wild plants along “universal” plant trait spectra." @default.
- W3119182201 created "2021-01-18" @default.
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- W3119182201 date "2021-02-01" @default.
- W3119182201 modified "2023-10-03" @default.
- W3119182201 title "Crops and the Seed Mass–Seed Output Trade-Off in Plants" @default.
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- W3119182201 doi "https://doi.org/10.1086/711472" @default.
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