Prospects And Advanced Study On Distant-Crossing Hybrid In Cotton

Cotton which has a great effect upon economic development is one of the most important economic crops and products in China. 1376 upland cultivars and 47 germplasms that have created great economic and social effect were bred since the People's Republic of China was found. However, in recent years, cotton breeding in China had been remaining in the same standard for long time that because many upland cultivars came from similar parents. Many experiment proved that distant-crossing hybrid in cotton which can amplify parents germplasms is one of the most breeding methods. This paper summaried prospects and advances of study on cotton distant-crossing hybrid on the basis of《areas plant project of the superiority of products from 2003 year to 2007 year》, the progress of distant-crossing hybrid in cotton in China and the research development of cotton distant-crossing hybrid in cotton institute of North-west Science-technology university of Agriculture and Forestry. The result of experiment showed following conclusions: the germplasm materials of distant-crossing hybrid in cotton provide sufficient valuable genetic characters for the cotton breeding, breakthough cultivars will be developed in the future; It is one of the most efficiency breeding methods to positively create advantage and identify end breeding characters on time; we discovered the key technology to solve three restriction factors which prevent from distant-crossing hybrid in cotton; Labelled inspection technique with kanamycin is one of the most efficient wasys to identify resistance to cotton Bollworm; During the genetic modification of distant-crossing materials in cotton, the times of backcrossing afterward continuous can't be much more than three.