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ARS Home » Southeast Area » Canal Point, Florida » Sugarcane Field Station » Research » Publications at this Location » Publication #340745
Title: Status of Sugarcane yellow leaf virus and its impact in different progenies

Author
item Sood, Sushma
item Comstock, Jack
item YANG, XIPING - University Of Florida
item Islam, Md
item 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: 6/6/2017
Citation: Sood, S.G., Comstock, J.C., Yang, X., Islam, M.S., Wang, J. 2017. Status of Sugarcane yellow leaf virus and its impact in different progenies. American Society of Sugar Cane Technologists. abstract only.

Interpretive Summary: Yellow leaf disease caused by Sugarcane yellow leaf virus (SCYLV) is an important disease for sugarcane industries worldwide. High yield losses up to 50% were reported in susceptible varieties. Most of the commercial cultivars in Florida are infected with SCYLV; therefore, there is a need for high yielding SCYLV resistant varieties. A study was conducted to find out the SCYLV status and its impact on some agronomic traits in progenies originated from four different crosses (CP80-1827 selfed, Green German × Ind81-146, CP95-1039 × CP88-1762 and CP88-1762 × CP95-1039). F1 individuals of these progenies were tested for SCYLV infection by tissue blot immunoassay. A selfing population made in 1994 using SCYLV susceptible sugarcane hybrid CP80-1827 showed gradual increase in SCYLV incidence from year 2002 (22%) to year 2016 (62%) under natural SCYLV infection pressure. On the other hand, disease data were skewed toward the resistant under natural SCYLV infection pressure in progenies derived from other three crosses. Progeny of the cross between a SCYLV susceptible Green German and resistant Ind81-146 exposed to natural infection for more than ten years has only 5% of SCYLV infected individuals and this level of infection has been consistent since 2010. Similarly, the two progenies originated from two reciprocal crosses between two SCYLV susceptible sugarcane hybrids CP95-1039 and CP88-1762 were also resulted in more SCYLV free individuals. These two progenies were exposed to natural SCYLV infection since 2010 and have 5% and 10% SCYLV infected individuals, respectively. The impact of SCYLV on sugarcane weight and sucrose content was also estimated by evaluating ten random stalks from a five feet plot for each individual. Results showed that there was no significant difference between average weights, brix, pol and juice volume between SCYLV infected and not infected individuals in all four progenies. Most of the SCYLV infected clones remained asymptomatic in these progenies. The results indicated that there may be some source of genetic resistance available against SCYLV disease in the studied progenies. Also, SCYLV appeared to have no significant negative impact on cane weight and sucrose content of the progenies of these families (crosses) in Florida.

Technical Abstract: Yellow leaf disease caused by Sugarcane yellow leaf virus (SCYLV) a Polerovirus is an important disease for sugarcane industries worldwide. High yield losses up to 50% were reported in susceptible varieties. Most of the commercial cultivars in Florida are infected with SCYLV; therefore, there is a need for high yielding SCYLV resistant varieties. A study was conducted to find out the SCYLV status and its impact on some agronomic traits in progenies originated from four different crosses (CP80-1827 selfed, Green German × Ind81-146, CP95-1039 × CP88-1762 and CP88-1762 × CP95-1039). F1 individuals of these progenies were tested for SCYLV infection by tissue blot immunoassay. A selfing population made in 1994 using SCYLV susceptible Saccharum spp. hybrid CP80-1827 showed gradual increase in SCYLV incidence from year 2002 (22%) to year 2016 (62%) under natural SCYLV infection pressure. On the other hand, disease data were skewed toward the resistant under natural SCYLV infection pressure in progenies derived from other three crosses. Progeny of the cross between a SCYLV susceptible Green German (S. officinarum) and resistant Ind81-146 (S. spontaneum) exposed to natural infection for more than ten years has only 5% of SCYLV infected individuals and this level of infection has been consistent since 2010. Similarly, the two progenies originated from two reciprocal crosses between two SCYLV susceptible Saccharum spp. hybrids CP95-1039 and CP88-1762 were also resulted in more SCYLV free individuals. These two progenies were exposed to natural SCYLV infection since 2010 and have 5% and 10% SCYLV infected individuals, respectively. The impact of SCYLV on weight, brix, pol and juice volume was also estimated by evaluating ten random stalks from a five feet plot for each individual. Results showed that there was no significant difference between average weights, brix, pol and juice volume between SCYLV infected and not infected individuals in all four progenies. Most of the SCYLV infected clones were remained asymptomatic in these progenies. The results indicated that there may be some source of genetic resistance available against SCYLV disease in the studied progenies. Also, SCYLV appeared to have no significant negative impact on cane weight and sucrose content of the progenies of these families (crosses) in Florida.