Novel Hybrid Rice Seed Production Method Incorporating Herbicide Tolerance
Abstract
The study relates to a hybrid rice seed production method to efficiently incorporate new herbicide tolerance into a systems using existing elite three-line hybrid rice parental lines, a WACMS female line, a maintainer line, and a restorer line. The method requires the following steps: (1) breeding for an isogenic maintainer line consisting of the trait of interest, herein herbicide tolerance using the elite maintainer parent and a donor of the trait of interest; (2) breeding for an isogenic restorer line consisting the trait of interest, herein herbicide tolerance using the elite restorer parent and a donor of the trait of interest; (3) introduction of the herbicide tolerance trait into the female line at the last step of basic seed production by crossing the isogenic maintainer line with the elite female line to generate a hemizygous female line; (4) introduction of the herbicide tolerance trait into the hybrid during the hybrid seed production by crossing the isogenic restorer line with the hemizygous female line. This study has validated the effectiveness of this invention with the modified hybrid seed production scheme. This system is versatile under field conditions and provides the possibility of utilizing heterosis both during the production of the hemizygous female seed and during yield trials of hybrid lines.
Subject
Hybrid RiceOryza sativa
three-line
herbicide tolerance
heterosis
hybrid seed production
isogenic
hemizygous
Citation
Chou, Nan-Yen (2017). Novel Hybrid Rice Seed Production Method Incorporating Herbicide Tolerance. Doctoral dissertation, Texas A & M University. Available electronically from https : / /hdl .handle .net /1969 .1 /161670.