Genetics and Genomics of Cotton Leaf Curl Disease, Its Viral Causal Agents and Whitefly Vector: A Way Forward to Sustain Cotton Fiber Security

Frontiers in Plant Science

Zainab Rahmat¹  Ali Q. Khan¹  Mehboob-ur- Rahman¹  Muhammad A. Iqbal¹  Yusuf Zafar² 

[1] National Institute for Biotechnology and Genetic EngineeringFaisalabad, Pakistan;Pakistan Agricultural Research CouncilIslamabad, Pakistan;

关键词: begomoviruses;    CLCuD;    genome editing;    introgression breeding;    marker-assisted breeding;   

DOI  :  10.3389/fpls.2017.01157

来源: DOAJ

【 摘 要 】

Cotton leaf curl disease (CLCuD) after its first epidemic in 1912 in Nigeria, has spread to different cotton growing countries including United States, Pakistan, India, and China. The disease is of viral origin—transmitted by the whitefly Bemisia tabaci, which is difficult to control because of the prevalence of multiple virulent viral strains or related species. The problem is further complicated as the CLCuD causing virus complex has a higher recombination rate. The availability of alternate host crops like tomato, okra, etc., and practicing mixed type farming system have further exaggerated the situation by adding synergy to the evolution of new viral strains and vectors. Efforts to control this disease using host plant resistance remained successful using two gene based-resistance that was broken by the evolution of new resistance breaking strain called Burewala virus. Development of transgenic cotton using both pathogen and non-pathogenic derived approaches are in progress. In future, screening for new forms of host resistance, use of DNA markers for the rapid incorporation of resistance into adapted cultivars overlaid with transgenics and using genome editing by CRISPR/Cas system would be instrumental in adding multiple layers of defense to control the disease—thus cotton fiber production will be sustained.

【 授权许可】

Unknown