Pecan
Genetics

Pecan is a 32-chromosome species (1N = 16) that readily hybridizes with other 32-chromosome members of the Carya genus, such as Carya ovata, Carya laciniosa, Carya cordiformis and has been reported to hybridize with 64-chromosome species such as Carya tomentosa. Most such hybrids are unproductive. Hybrids are referred to as " hicans " to indicate their hybrid origin. Recent efforts at NMSU to complete a pecan genome showed that DNA introgressed from C. Aquatica (water hickory), C. Myristiciformis (nutmeg hickory), and C. Cordiformis (bitternut hickory) is present in commercial pecan varieties grown today.
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