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CROP BREEDING, GENETICS & CYTOLOGY

Potential of Using Plant Row Yield Trials to Predict Soybean Yield

^a Pioneer Hi-Bred Intl., 7230 NW 70th Ave., P.O. Box 177, Johnston, IA 50131-0177 USA
^b Univ. of Illinois at Urbana-Champaign, Dep. of Crop Sciences, 1102 S. Goodwin, Urbana, IL 61801 USA

hegstajeff{at}phibred.com

Plant row yield trials (PRYT) are measured as an indicator of yield potential for many private and public soybean breeding programs. To identify elite lines and develop new cultivars, the highest yielding PRYT lines are usually advanced to multiple replications in different environments. Early generation PRYT testing has the advantage of identifying elite lines in the initial phases of the selection process. The objective of this study was to determine if single row PRYT testing is a reliable predictor of yield in multiple environment advanced yield testing. In 1996, five F_2:3 populations of crosses between different elite cultivars were grown as single row PRYT. After the 1996 PRYT test, the top 10, middle 10, and bottom 10 yielding PRYT lines from each population were selected for advanced testing in 1997 and 1998. Yield and yield rank correlations between selected 1996 PRYT and advanced yield testing were highest for the `Jack' x `Resnik' and `Asgrow A3733' x `Burlison' populations, respectively. Matrix analysis indicated that the lines selected from the Asgrow A3733 x Burlison population were the most stable when 1996 PRYT data are compared with advanced yield test data. Approximately five lines can be identified from each population that are the highest yielding in PRYT testing and advanced yield testing. Additionally, approximately five lines could be identified from each population that are the lowest yielding in PRYT testing and advanced yield tests. In the populations examined it can be concluded that early generation PRYT testing would allow for progress to be made in identifying elite soybean lines with high yield potential.

Abbreviations: PRYT, plant row yield trials

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