Location: Sugarcane ResearchTitle: Notice of release of sugarcane variety Ho 12-615
|WHITE, WILLIAM - Retired ARS Employee|
|TEW, THOMAS - Retired ARS Employee|
|KIMBENG, COLLINS - LSU Agcenter|
|WAGUESPACK, HERMAN - American Sugar Cane League|
|GRAVOIS, KENNETH - LSU Agcenter|
Submitted to: Sugar Bulletin
Publication Type: Trade Journal
Publication Acceptance Date: 5/20/2019
Publication Date: 5/20/2019
Citation: Todd, J.R., Hale, A.L., Dufrene Jr, E.O., White, W.H., Tew, T.L., Grisham, M.P., Kimbeng, C., Duet Jr, M.J., Verdun, D.L., Waguespack, H., Pan, Y.-B., Gravois, K.A. 2019. Notice of release of sugarcane variety Ho 12-615. Sugar Bulletin. 97(8):17-18.
Technical Abstract: The Agricultural Research Service of the United States Department of Agriculture, the Louisiana Agricultural Experiment Station of the LSU Agricultural Center, and the American Sugar Cane League of the U.S.A., Inc., working cooperatively to develop improved sugarcane varieties, have jointly developed and hereby announce the release of a new sugarcane variety, Ho 12-615, for commercial planting in the summer of 2019. Ho 12-615 is a product of the cross between TucCP 77-42 and HoCP 96-540 made at Houma, LA in 2007 and selected at Houma (Ho), Louisiana in 2012. The variety Ho 12-615 compares well in yield with the variety L 01-299, the highest yielding commercial variety currently being grown in Louisiana. In comparisons with L 01-299 in 32 plant-cane outfield evaluations, Ho 12-615 had significantly higher sugar/acre (10,635 vs. 9207 lbs.) and cane/acre (38.2 vs. 33.0 tons) yields, but not significantly higher in sugar/ton of cane (279 vs 279 lbs.). It had a significantly greater number of stalks/acre (36,736 vs. 28,792), but its individual stalk weight was significantly less (2.11 vs. 2.34 lbs.). In 20 first-stubble outfield evaluations, Ho 12-615 was not significantly different than L 01-299 for sugar/acre (10,408 vs. 10,458 lbs.), and was statistically equal in cane/acre (37.8 vs. 37.1 tons) and sugar/ton of cane (278 vs 283 lbs.). The stalk population of Ho 12-615 was again statistically greater than L 01-299 (40,079 vs. 34,862 stalks per acre), but its stalk weight was less (1.91 vs 2.15 lbs.). In eight second-stubble outfield evaluations, Ho 12-615 was statistically equal to L 01-299 in sugar/acre (9466 vs. 10,158 lbs.), sugar/ton cane (237 vs 241 lbs) and tons cane/acre (40.2 vs 42.1 tons). There were no significant difference in the population of stalks/acre (43,791 vs 43,512), and stalk weight (1.89 vs 1.97 lbs.). Ho 12-615 matures earlier than L 01-299 but is not as early maturing as HoCP 00-950. It is very similar to HoCP 04-838 in maturity. Ho 12-615 is resistant to smut caused by Sporisorium scitamineum, and moderately resistant to sugarcane borer, Diatraea saccharalis. It is moderately susceptible to brown rust caused by Puccinia melanocephala and mosaic caused by Sorghum mosaic virus (SrMV) and leaf scald caused by Xanthomonas albilineans. It is susceptible to ratoon stunt caused by Leifsonia xyli subsp. xyli.