HomeInternational Rice Research Notesvol. 24 no. 2 (1999)

In Situ Conservation of Oryza Rufipogon

Bao-rong Lu

Discipline: Agriculture, Plant Breeding

 

Abstract:

Oryza rufipogon Griff. is one of three native wild rice species found in southern China that have contributed greatly to the country’s rice breeding programs. The direct use of O. rufipogon in a rice breeding program through wide hybridization in Guangdong Province was recently reported. Professor Haidong Song of the Zhengchen Agricultural Bureau crossed individuals from one O. rufipogon population near Yangtian Bridge, Zhengchen City, with an improved Chinese rice variety, Guicao No. 2. After several years of evaluation and selection, a series of rice varieties – Guiye Zhan No. 2, No. 3, and No. 10; Guiye Wanzhan No. 1 and No. 2; Yeao Simiao; and Guiao SimiaoÑwere bred. These wide cross-derived new rice varieties are characterized by high yield, excellent eating quality, and good resistance to rice blast, bacterial blight, bacterial leaf streak, and brown planthopper. These varieties are grown on about 950,000 ha in 13 provinces.