Evaluation of Cotton Variety Performance with Consideration to Variations in Field-By-Field Yield Potential

Tyson, Chris

Evaluation of Cotton Variety Performance with Consideration to Variations in Field-By-Field Yield Potential

Tuesday, January 7, 2014

Mardi Gras Ballroom Salons E, F, G & H (New Orleans Marriott)

Wednesday, January 8, 2014

Mardi Gras Ballroom Salons E, F, G & H (New Orleans Marriott)

Jared R Whitaker , University of Georgia

Chris Tyson , UGA Cooperative Extension, Tattnall County

Guy D Collins , University of Georgia

William G. Tyson , University of Georgia Cooperative Extension

M. Brent Allen , UGA

Ronnie M. Barentine , University of Georgia

Eddie D. Beasley , UGA Cooperative Extension

D. Scott Carlson , University of Georgia

Don W. Clark , University of Georgia

Brian Lee Cresswell , University of Georgia

D. Shane Curry , University of Georgia

Michael A. Dollar , University of Georgia

R. Phillip Edwards , University of Georgia

W Jerome Ethredge , University of Georgia

Mark Freeman , University of Georgia - Pulaski County Extension

Mark A. Frye , University of Georgia

T. Jay Hathorn , UGA Cooperative Extension

Ray Hicks , University of Georgia

Brooke H. Jeffries , University of Georgia

Justin D. Lanier , University of Georgia - Crisp County

Jennifer T. Miller , University of Georgia

Timothy W Moore , University of Georgia

Daniel S. Price , University of Georgia - Cook County

Cliff M. Riner , University of Georgia

J. Peyton Sapp , University of Georgia

Pamela Sapp , University of Georgia

Justin S. Shealey , University of Georgia

Timothy W Smith , University of Georgia

David Spaid , University of Georgia

T. Brian Tankersley , University of Georgia

J. Larry Varnadoe , University of Georgia

Tim Varnedore , University of Georgia

Proper cotton variety selection is extremely valuable for producers across the country. In Georgia, an on-farm, replicated variety trial program was implemented since 2010. This program evaluates a set of top-performing varieties in numerous trials across the state. With the large number of locations, variety performance is ultimately assessed in diverse range of conditions. Those conditions impact overall yields within each trial and allow for variety comparisons in environments that widely range in average yield. In this study, we attempt to more adequately interpret data such that a variety may be compared based on a producers’ particular yield expectation. Data from 2011 and 2012 appear indicate that some varieties were more competitive at lower yield environments and vice versa. Five varieties were included in this study at all were tested in 2012 and 2013 (DP 1050 B2RF, DP 1137 B2RF, DP 1252 B2RF, FM 1944 GLB2 and PHY 499 WRF). Data (lint yield and fiber quality) were compared by several methods. In particular, analyses (mean separation and frequency of particular rank within trials) were conducted using data from all locations, using only locations which had average yields less than two bales per acre, using only locations which had average yields between two and three bales per acre and using only locations with average yield higher than three bales per acre.