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

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

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 11/10/2021
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 and requires new cultivars to increase yield and diversity. To understand if sugarcane yield and selection is affected by genotype by environment (GXE), sugarcane sucrose and cane yield trial data were analyzed. Yield data from four experimental plantings at four to five locations that vary by planting with up to four crops was analyzed by planting. The location, variety, and variety by location main effects, were statistically significant. Heritability of certain locations was inconsistent by planting or crop indicating that growing practices occasionally obscured genetic differences. Genotype by environment (GXE) interaction was further analyzed utilizing GGE biplots for sugar and cane yield by combining data across crops for each planting or series. Stability biplots indicated that the check cultivar CP 89-2143 was more stable with higher sugar per acre mean performance than CP 72-1210. The biplot patterns visualized one to two inconsistent mega environment patterns that varied by series planted. The biplot results indicate that GXE is present and locations were discriminating but mega environments are inconsistent.