AUTHOR=Fan Fengfeng , Li Nengwu , Chen Yunping , Liu Xingdan , Sun Heng , Wang Jie , He Guangcun , Zhu Yingguo , Li Shaoqing 

TITLE=Development of Elite BPH-Resistant Wide-Spectrum Restorer Lines for Three and Two Line Hybrid Rice

JOURNAL=Frontiers in Plant Science

VOLUME=Volume 8 - 2017

YEAR=2017

URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2017.00986

DOI=10.3389/fpls.2017.00986

ISSN=1664-462X

ABSTRACT=<p>Hybrid rice has contributed significantly to the world food security. Breeding of elite high-yield, strong-resistant broad-spectrum restorer line is an important strategy for hybrid rice in commercial breeding programs. Here, we developed three elite brown planthopper (BPH)-resistant wide-spectrum restorer lines by pyramiding big-panicle gene <italic>Gn8.1</italic>, BPH-resistant genes <italic>Bph6</italic> and <italic>Bph9</italic>, fertility restorer genes <italic>Rf3, Rf4, Rf5</italic>, and <italic>Rf6</italic> through molecular marker assisted selection. Resistance analysis revealed that the newly developed restorer lines showed stronger BPH-resistance than any of the single-gene donor parent Luoyang-6 and Luoyang-9. Moreover, the three new restorer lines had broad spectrum recovery capabilities for Honglian CMS, Wild abortive CMS and two-line GMS sterile lines, and higher grain yields than that of the recurrent parent 9,311 under nature field conditions. Importantly, the hybrid crosses also showed good performance for grain yield and BPH-resistance. Thus, the development of elite BPH-resistant wide-spectrum restorer lines has a promising future for breeding of broad spectrum BPH-resistant high-yield varieties.</p>