|WANG, YIHONG - University Of Louisiana|
Submitted to: Book Chapter
Publication Type: Book / Chapter
Publication Acceptance Date: 5/1/2014
Publication Date: 6/8/2014
Citation: Burow, G.B., Wang, Y., Burke, J.J. 2014. Genetic mapping of abiotic stress responses in sorghum. Wang, Yi-Hong, Upadhyaya, Hari D., Kole, Chittaranjan, Genetics, Genomics and Breeding of Sorghum. 1st Edition. Boca Raton, FL: CRC PRess. p. 182:197.
Technical Abstract: Due to rich genetic diversity for tolerance to various abiotic stress conditions, sorghum is an ideal system for genetic mapping and elucidation of genome regions that confer such response among cereal crops. Coupled with the development of DNA marker technologies and most recently the sequencing of the sorghum genome, plus the development and availability of mapping populations, progress in elucidation of genome regions that confer tolerance to abiotic stresses will continue to develop and is one of the most exciting aspects of sorghum genetic studies. This chapter focuses on tolerance to drought, aluminum toxicity and early season cold. Genetic studies have been conducted in all the three areas but are most extensive in drought tolerance, especially mapping and identifying genes that confer the “stay-green” phenotype. Genomic regions containing stay-green genes have been mapped in sorghum chromosomes 2, 3, and 4 with consensus by several groups. A major gene for aluminum tolerance has been cloned while mapping of genes responsible for early season cold has been accelerated in the last few years. Genetic information from these studies has been applied to molecular plant breeding in sorghum.