Location: Sugarcane Field StationTitle: Phenotypic evaluations of disease resistance in populations derived from different crosses
|YANG, XIPING - University Of Florida|
|COMSTOCK, JACK - Retired ARS Employee|
|WANG, JIANPING - University Of Florida|
Submitted to: American Society of Sugar Cane Technologists
Publication Type: Abstract Only
Publication Acceptance Date: 6/22/2019
Publication Date: 12/20/2019
Citation: Sood, S.G., Yang, X., Comstock, J.C., Islam, M.S., Wang, J. 2019. Phenotypic evaluations of disease resistance in populations derived from different crosses. American Society of Sugar Cane Technologists. 39:27-28.
Interpretive Summary: N/A
Technical Abstract: Sugarcane, an economically important crop in Florida is threatened by many diseases. Acquiring resistance through breeding to these diseases is the most sustainable method of control. Although, selection of disease resistant cultivars based on phenotype data has been vital for the development of disease resistant cultivars since the beginning of breeding practices. However, marker assisted selection (MAS) for disease resistance increases accuracy and efficiency of the selection process as well as saving money and time. Therefore, phenotypic evaluations of F1 populations derived from four crosses (CP95-1039 x CP88-1762; CP88-1762 x CP95-1039, a reciprocal cross; Green German x Ind81-146; and a self-cross of CP80-1827) were used to identify quantitative trait loci (QTL) for disease resistance and to develop markers for MAS. Populations derived from the crosses between CP95-1039 x CP88-1762 and CP88-1762 x CP95-1039 were evaluated for the resistance to brown rust, orange rust and yellow leaf. Phenotype data for these diseases were collected and used for the QTL identification and marker development. QTL for resistance to brown rust, orange rust and yellow leaf have been identified and molecular markers have been developed and validated for orange rust resistance. The population from Green German x Ind81-146 cross has also been evaluated for orange rust, yellow leaf and ratoon stunting disease (RSD). The self population of CP80-1827 has been evaluated for yellow leaf and RSD. The identified markers could be helpful in the selection of disease resistant cultivars.