Parental effects in Plantago lanceolata L. II. Manipulation of grandparental temperature and parental flowering time

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
Elizabeth P. Lacey, Professor (Creator)
The University of North Carolina at Greensboro (UNCG )
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Abstract: In an experimental study of Plantar lanceolata L., postzygotic environmentally induced parental effects were (1) transmitted across generations, (2) genotype-specific, and (3) mediated by natural differences in flowering phenolop. Individuals were cloned, hand-pollinated and allowed to mature seed at one of two temperatures. Second-generation plants were induced to seed-set at four times during the flowering season. The effects of grandparental temperature (GPT), parental flowering time (PFT) and maternal family (MFAM) on seed size, germination, leaf area and allometry, flowering time and male sterility in third generation plants were then measured. GPT significantly affected all adult traits and did so more strongly than and often independently of seed weight and germination. The data suggest that heritable GPT effects arise from gametophytic selection or genomic modification. Significant GPT x MFAM interactions were detected for seed weight, leaf area, flowering time, and male sterility. Such genotype-specific responses are necessary if parental temperature is to influence the evolutionary divergence of life history and breeding patterns in populations growing in different temperature regimes. PFT affected leaf area and percentage germination. Natural changes in photoperiod but not temperature may explain the observed PFT effects on germination.

Additional Information

Heredity 76(3): 287-295
Language: English
Date: 1996
flowering phenology, gametophytic selection, intergenerational plasticity, life history evolution, parental temperature effects, Plantago lanceolata

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