Analysis of sugarcane genotype by environment yield in the Rio Grande Valley of Texas using GGE biplot

Authors: Todd, James; SOLIS, ADAN - Rio Farms, Inc; SCOTT, ANDY - Rio Farms, Inc; KLOSTERMANN, MATT - Rio Farms, Inc

Submitted to: American Society of Sugar Cane Technologists
Publication Type: Abstract Only
Publication Acceptance Date: 6/15/2021
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Sugarcane was harvested on 15,000 ha annually in the Rio Grande Valley in Texas from 2017-2020. Genotype plus genotype by environment (GGE) biplots can be used to identify high yielding cultivars and the environments, or locations, where high yielding cultivars excel. Sugarcane sucrose and cane yield trial data for six plantings, up to four crops, nine locations and 119 varieties total from six years were evaluated. The crop, location, variety, and year main effects, and their interactions were significant. To estimate genotype by environment interaction (GXE) GGE biplots for sugar and cane yield were produced by combining data across crops for each planting or series. The biplot patterns indicated potential but inconsistent mega environments with one to three mega environments present depending on series planted. This indicates that GXE interaction is present in Texas justifying the need to continue to evaluate cultivars in different locations, but it is not consistent enough to divide breeding selection for separate environments. The biplots indicate that the locations utilized were discriminating and able to identify GXE if present. Of the check cultivars planted CP 89-2143 was more stable with higher sugar per acre mean performance than CP 72-1210.