Efficient Rice Breeding in South China——From Early-late Season Double-cropping Rice Breeding to Variety-restorer Line Rice Breeding

Abstract

The breeding of early-late season double-cropping rice and variety-restorer line rice with high efficiency in South China were reviewed. Early-late season double-cropping rice breeding has achieved remarkable results, and has even affected breeding and production mode of rice. The breeding of variety-restorer line rice succeeded and expanded that of early-late season double-cropping rice. Outstanding achievement was made in variety-restorer line rice breeding, and several varieties such as Huanghuazhan, Huanglizhan, Huangguangyouzhan, Huangyuesimiao, Wushanyouzhan(Huazhan), Wushansimikao with great impact played an important role in rice production in South China. Among them, Huanghuazhan has been registered in 8 provinces such as Guangdong, Hunan, Hubei, and it was the indica variety with largest promotion area in China per year. A total of 142 combinations from Huazhan has been registered at different levels for 252 times, and it was top 1 restorer line in combination amount. Wushansimiao has been registered in 4 provinces such as Guangdong and Shaanxi. A total of 47 combinations from Wushansimniao has been registered at different levels for 88 times. Taking twoline hybrid combinations such as"Jingliangyou 534"and"Longliangyouhuazhan"as example, the study put forward and advocated strategies for rice breeding: restorer lines would be cultivated in South China and the sterile lines would be developed in different ecological regions, hybrid combinations with strong advantage could be bred to form an overall layout with win-win cooperation, coordinated development, efficiency and complementation.

Keywords

• early-late season double-cropping rice
• variety-restorer line rice
• conventional rice
• hybrid rice
• breeding strategy