These authors contributed equally to this work.
Introgression and selection shaping the genome and adaptive loci of weedy rice in northern China
Article first published online: 29 OCT 2012
© 2012 The Authors. New Phytologist © 2012 New Phytologist Trust
Volume 197, Issue 1, pages 290–299, January 2013
How to Cite
Sun, J., Qian, Q., Ma, D.-R., Xu, Z.-J., Liu, D., Du, H.-B. and Chen, W.-F. (2013), Introgression and selection shaping the genome and adaptive loci of weedy rice in northern China. New Phytologist, 197: 290–299. doi: 10.1111/nph.12012
- Issue published online: 26 NOV 2012
- Article first published online: 29 OCT 2012
- Manuscript Accepted: 20 SEP 2012
- Manuscript Received: 16 APR 2012
- National Natural Science Foundation of China (NSFC. Grant Number: 31271687
- China Agriculture Research System. Grant Number: CARS-01-13
- Open Subject of State Key Laboratory of Rice Biology. Grant Number: 090404
- Natural Science Foundation of Liaoning, China. Grant Number: 20102192
- seed longevity;
- weedy rice
- As a weed of rice paddy fields, weedy rice has spread worldwide. In northern China, the expansion of weedy rice has been rapid over the past two decades. Its evolutionary history and adaptive mechanisms are poorly understood.
- Evolutionary relationships between northern weedy rice and rice cultivars were analyzed using presumed neutral markers sampled across the rice genome. Genes involved in rice domestication were evaluated for their potential roles in weedy rice adaptation. Seed longevity, a critical trait of weedy rice, was examined in an F2 population derived from a cross between weedy rice and a rice cultivar to evaluate weedy rice adaptation and the potential effect of candidate genes.
- Weedy rice in northern China was not derived directly from closely related wild Oryza species or from the introgression of indica subspecies. Introgression with local cultivars, coupled with selection that maintained weedy identity, shaped the evolution of weedy rice in northern China.
- Weedy rice is a unique system with which to investigate how weedy plants adapt to an agricultural environment. Our finding that extensive introgression from local cultivars, combined with the continuing ability to maintain weedy genes, is characteristic of weedy rice in northern China provides a clue for the field control of weedy rice.