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Published on: November 6, 2016
Transgenerational Genetic Effects Help Explain Latitudinal Variation in Seed Mass and Germination Timing in Plantago
Elizabeth P Lacey1, Matthew M Marshall1,2, Marc Bucciarelli1
1Department of Biology, University of North Carolina, P.O. Box 26170, Greensboro, NC 27402, USA.
Maternal plant genetics influence seed traits like size and germination timing. Northern mothers produce larger seeds with delayed germination, while southern mothers produce smaller seeds with faster germination.
Area of Science:
- Plant evolutionary biology
- Ecology
- Genetics
Background:
- Understanding genetic control of seed traits across geographic gradients is crucial for population evolution and conservation.
- Phenotypic variation in seed traits can impact species' adaptation and distribution.
Purpose of the Study:
- To investigate the genetic basis of seed mass and germination timing variation in *Plantago lanceolata*.
- To determine the role of transgenerational genetic effects in shaping seed trait patterns across European latitudinal gradients.
Main Methods:
- Reciprocal crosses were performed between northern and southern *Plantago lanceolata* genotypes.
- Seed traits (mass, germination timing) were analyzed in offspring from these crosses.
- Maternal effects on seed coat and embryo/endosperm tissues were assessed.
Main Results:
- Significant transgenerational genetic effects were observed for seed mass and germination timing.
- Northern mothers produced larger seeds with delayed germination compared to southern mothers.
- Maternal latitude influenced both maternal (seed coat) and offspring (embryo/endosperm) tissues.
Conclusions:
- Latitudinal variation in seed traits is partly explained by direct maternal genotype influence, independent of zygotic inheritance.
- Transgenerational genetic effects are important for understanding geographic variation within species.
- Considering transgenerational control of seed traits is vital for effective species conservation and restoration efforts.
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