Abstract:

In order to cause plant genetic variation and quickly breed varieties to improve the yield, quality and resistance of crop, a new method of space breeding was researched. Fuhui 673 was a hybrid rice restorer line bred by space mutation and crossbreeding technology in Rice Research of Institute Fujian Academy of Agricultural Sciences. Its characters were strong restorer ability, wide restorer profile and good combining capacity. Tianyou 673 was developed from the cross of good quality three-line male sterile Tianfeng A with restorer line Fuhui 673. The results of many year experiments showed that Tianyou 673 had characteristics of high yield, resistance to rice blast, fine grain quality, suitable maturity, wide adaptability and high seed production. The average yield was 7.09 t/hm2 in two years for Fujian province regional test, 5.39% higher than the check variety Shanyou 63. Its yield was 7.56 t/hm2 in Fujian province productive regional test, 10.29% higher than the check variety Shanyou. It has shown resistance to rice blast in two years for Fujian province regional test of identification of rice blast indoor. It was registered and released for commercial use in Fujian province in March, 2010. The method of space mutation combined with crossbreeding technology could be successful in bringing out new varieties of high yield and resistance to blast.