|YANG, XIPING - University Of Florida|
|WANG, JIANPING - University Of Florida|
Submitted to: American Society of Sugar Cane Technologists
Publication Type: Abstract Only
Publication Acceptance Date: 5/8/2017
Publication Date: 6/16/2017
Citation: Islam, M.S., Yang, X., Sood, S.G., Comstock, J.C., Wang, J. 2017. Unravel the genetic basis of Sugarcane Yellow Leaf Virus (SCYLV) resistance in Saccharum spp. hybrid. American Society of Sugar Cane Technologists. ABSTRACT ONLY.
Interpretive Summary: N/A
Technical Abstract: Sugarcane (Saccharum Spp.) produces 80% of the world’s table sugar along with several other byproducts. The production of sugarcane is vulnerable due to infestation of sugarcane yellow leaf virus (SCYLV) worldwide. A genetic mapping study was conducted using an F1 segregating population derived from the cross CP95-1039 × CP88-1762 in Canal Point, Florida to find out the genetic factors underlying SCYLV resistance. The disease infection data were measured using tissue blot immunoassay after six years of exposure to the virus under natural field conditions. Genetic maps were created using genotyping by sequencing based markers for each parent separately following a pseudo test-cross approach. Two quantitative trait loci (QTL) were detected for SCYLV resistance accounting for 28% of the phenotypic variation. The major QTL qSCYLR79 located on linkage group C79 and linked with marker 3tag3804 appears to be unique for SCYLV resistance in Saccharum Spp. hybrids. Progenies having a combination of two major alleles had 31% less SCYLV incidence than progenies with a combination of major and minor alleles in the genomic region of qSCYLR79. Thus, selection against the minor allele may decrease SCYLV incidence in sugarcane hybrids.