Utilizing Dominant Early Maturity Genes of Sterile Line UP-3s in Hybrid Rice Breeding to Avoid High Temperature Season


A new sterile line UP-3s, which carries the Dominant Early Maturity Gene (DEMG), was bred on the farm of University of Arkansas at Pine Bluff (UAPB). UP-3s and two check sterile lines, Jin23-A and Xie-A which do not carry the Dominant Early Maturity Gene, were crossed with a group of different maturity restorer lines, PB-1R, PB-5R,PB11, PB-13R, PB-20, PB-21, PB-22R, and PB-23R. Eighteen new hybrid rice combinations of these crosses were then tested at UAPB in 2012 and 2013. The results showed that panicle differentiation (PD) of hybrids from female parent UP-3s (DEMG) crossed with the 8 male parents, were earlier than the hybrids from female parent Jin23-A or Xie-A crossed with the 8 male parents. The PD of these earlier hybrids was before Jun 25 and heading was before July 20. Early PD and heading avoided the high temperature (over 34°C) period which usually occurs after July 20 in Arkansas. The yields of these earlier maturity hybrids with female parent UP-3s were higher than those of the late maturity hybrids thatwereF1 progeny of sterile lines Jin23-A or Xie-A (these two female parent checks with non-DEMG). These results showed that the DEMG sterile line UP-3s can be adopted in making crosses with later maturity restorer lines to obtain earlier maturity hybrids to avoid the high temperature period in Arkansas.

Share and Cite:

Huang, B. and Yan, Z. (2015) Utilizing Dominant Early Maturity Genes of Sterile Line UP-3s in Hybrid Rice Breeding to Avoid High Temperature Season. American Journal of Plant Sciences, 6, 2596-2602. doi: 10.4236/ajps.2015.616262.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Rice Tec. Product Guide 2015. www.ricetec.com
[2] Yuan, L.P. (1966) A Preliminary Report on Male Sterility in Rice. Science Bulletin, 4, 32-34.
[3] Yuan and Virmani (1988) Status of Hybrid Rice Research and Development. Manila, Phlippines. IRRI.
[4] Bennett, D. (2010) Hybrid Rice Varieties—Range of Options. Delta Farm Press, Saint Charles.
[5] Hardke, J.T. (2014) Arkansas Harvested Rice Acreage Summary Preliminary Report.
[6] Hardke, J.T. (2014) Trends in Arkansas Rice Production, 2013. University of Arkansas Agricultural Experiment Station Research Series 617, Fayetteville, Ark, 13-23.
[7] Huang, B., Yan, Z., Deren, C.W., Yan, W. and Mc Cung, A. (2012) Evaluation of Male Sterile Lines of Hybrid Rice at UAPB Farm. 34th Rice Technical Working Group, Hot Spring, AR, February 2012.
[8] Huang, B.H., Yan, Z.B., Yan, W.G. and Deren, C. (2015) Changes of Sterility to Some Two Line System Male Sterilers in Different Rice Growing Seasons at Pine Bluff, AR USA. Accepted by Southwest China Journal of Agricultural Sciences.

Copyright © 2022 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.