Search
×

Sign up

Use your Facebook account for quick registration

OR

Create a Shvoong account from scratch

Already a Member? Sign In!
×

Sign In

Sign in using your Facebook account

OR

Not a Member? Sign up!
×

Sign up

Use your Facebook account for quick registration

OR

Sign In

Sign in using your Facebook account

Shvoong Home>Science>Biology>Global Dissemination of a Single Mutation Conferring White Pericarp in Rice Summary

Global Dissemination of a Single Mutation Conferring White Pericarp in Rice

Book Summary   by:PLoS     Original Authors: Sweeney Megan T; Thomson Michael J; Cho Yong Gu; Park Yong Jin; Williamson Scott H; Bustamante Carlos D; McCouch Susan R
ª
 
Here we report that the change from the red seeds of wild rice to the white seeds of cultivated rice (Oryza sativa) resulted from the strong selective sweep of a single mutation, a frame-shift deletion within the Rc gene that is found in 97.9 of white rice varieties today. A second mutation, also within Rc, is present in less than 3 of white accessions surveyed. Haplotype analysis revealed that the predominant mutation originated in the japonica subspecies and crossed both geographic and sterility barriers to move into the indica subspecies. A little less than one Mb of japonica DNA hitchhiked with the rc allele into most indica varieties, suggesting that other linked domestication alleles may have been transferred from japonica to indica along with white pericarp color. Our finding provides evidence of active cultural exchange among ancient farmers over the course of rice domestication coupled with very strong, positive selection for a single white allele in both subspecies of O. sativa.
Published: August 10, 2007   
Please Rate this Summary : 1 2 3 4 5
Translate Send Link Print
X

.