In:
Plant Biotechnology Journal, Wiley, Vol. 14, No. 11 ( 2016-11), p. 2134-2146
Abstract:
Grain weight is the most important component of rice yield and is mainly determined by grain size, which is generally controlled by quantitative trait loci ( QTL s). Although numerous QTL s that regulate grain weight have been identified, the genetic network that controls grain size remains unclear. Herein, we report the cloning and functional analysis of a dominant QTL , grain length and width 2 ( GLW 2 ), which positively regulates grain weight by simultaneously increasing grain length and width. The GLW 2 locus encodes OsGRF4 (growth‐regulating factor 4) and is regulated by the micro RNA miR396c in vivo . The mutation in OsGRF4 perturbs the OsmiR396 target regulation of OsGRF4 , generating a larger grain size and enhanced grain yield. We also demonstrate that Os GIF 1 (GRF‐interacting factors 1) directly interacts with OsGRF4, and increasing its expression improves grain size. Our results suggest that the miR396c‐OsGRF4‐Os GIF 1 regulatory module plays an important role in grain size determination and holds implications for rice yield improvement.
Type of Medium:
Online Resource
ISSN:
1467-7644
,
1467-7652
DOI:
10.1111/pbi.2016.14.issue-11
Language:
English
Publisher:
Wiley
Publication Date:
2016
detail.hit.zdb_id:
2136367-5
SSG:
12