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Proc Biol Sci. 1999 Nov 7;266(1434):2175-9.

Zinc tolerance and hyperaccumulation are genetically independent characters.

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  • 1Department of Biological Sciences, University of Exeter, Hatherly Laboratories, UK. m.r.macnair@ex.ac.uk

Abstract

The hyperaccumulation of metals by a rare class of plants is a fascinating and little understood phenomenon. No genetic analysis has been possible since no intraspecific variation is known for this character. Here, we report on crosses between the zinc-hyperaccumulating and -tolerant species Arabidopsis halleri and the non-hyperaccumulating, non-tolerant species Arabidopsis petraea. The F2 segregates for both characters and it appears that the two characters are genetically independent. The data for tolerance are consistent with a single major gene for this character (although the number of genes for hyperaccumulation cannot be determined), and is probably not very large.

PMID:
10649632
[PubMed - indexed for MEDLINE]
PMCID:
PMC1690342
Free PMC Article
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