Transcript Sep 12, 2011 Hybridization + Polyploidy

The Problematic Red Wolf
Is the red wolf a species or a long-established
hybrid of the gray wolf and the coyote?
Such distinctions may affect ongoing efforts to
save a variety of endangered species
by Robert K. Wayne and John L. Gittleman
SCIENTIFIC AMERICAN July 1995
A Ring Species: The Ensatina Complex
Domesticated Horse (Equus caballus) has 64 pairs of chromosomes
Domesticated Ass (Equus asinus) has 62 pairs of chromosomes
Male Ass x Female Horse = Mule
Male Horse x Female Ass = Hinney
Hybridization in the Salvias
Salvia apiana – White Sage
Salvia mellifera – Black Sage
Polyploidy
Iris hexagona
Iris fulva
A Domesticated Banana - The Cavendish
A triploid derivative of Musa acuminata
A Wild Banana (Musa balbisiana)
The Cavendish Banana was first introduced to England from
the Canary Islands but was originally from China or Viet Nam.
It was cultivated in hot houses on Lord Cavendish’s estate and from there
developed as the commercial crop.
Polyploidy
A Wild Banana (Musa balbisiana)
A Domesticated Banana - The Cavendish
A triploid derivative of Musa acuminata
The Cavendish Banana was first introduced to England from
the Canary Islands but was originally from China or Viet Nam.
It was cultivated in hot houses on Lord Cavendish’s estate and from there
developed as the commercial crop.