Zinc tolerance and hyperaccumulation are genetically independent characters

  • Macnair M
  • Bert V
  • Huitson S
 et al. 
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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.

Author-supplied keywords

  • Arabidopsis halleri
  • Hyperaccumulation
  • Phytoremediation

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