Location: Sugarcane Field StationTitle: Impact of Sugarcane yellow leaf virus on sugarcane yield traits in progenies from four diverse crosses
Submitted to: Phytopathology
Publication Type: Abstract Only
Publication Acceptance Date: 3/27/2018
Publication Date: 7/29/2018
Citation: Sood, S.G., Comstock, J.C., Zhao, D. 2018. Impact of Sugarcane yellow leaf virus on sugarcane yield traits in progenies from four diverse crosses. Phytopathology. 108:10S-17.
Interpretive Summary: N/A
Technical Abstract: Yellow leaf caused by Sugarcane yellow leaf virus (SCYLV) is an important disease for sugarcane industries worldwide. Yield losses up to 50% were reported in susceptible varieties. Most commercial cultivars in Florida are infected with SCYLV. A study was conducted to determine the impact of SCYLV in sugarcane progenies originated from four crosses [CP 80-1827 (susceptible) selfed, Green German (susceptible) × Ind 81-146 (resistant), and reciprocal crosses between two susceptible varieties CP 95-1039 and CP 88-1762]. These progenies were exposed to the natural infestation of SCYLV vector aphids (Melanaphis sacchari; Rhopalosiphum species) for more than ten years, however, most of the individuals in the four progenies were asymptomatic. Individuals of these progenies were tested for SCYLV infection by tissue blot immunoassay. The impact of SCYLV on sugarcane stalk weight and sucrose content was estimated by evaluating ten random stalks from a seven foot plot for each individual. Juice was collected and measured only in individuals of progeny obtained from the cross between Green German x Ind 81-146. Results showed that 52% of individuals of CP 80-1827 selfed progeny were infected with SCYLV, however, only 5-10% individuals in other crosses were infected. No significant difference was observed in average stalk weight, juice brix, pol and volume between the SCYLV infected and uninfected individuals in all four progenies. SCYLV had no negative impact on important parameters of sugarcane production in the progenies of the crosses studied. Although previous studies showed an impact on yield in Florida, the effects of SCYLV on sugarcane yield traits were relatively lower in these trials.