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Disease- and Performance-Related Traits of Ethylene-Insensitive Soybean

^a Dep. of Plant Pathology, Univ. of Wisconsin-Madison, 1630 Linden Dr., Madison, WI 53706
^b Soygenetics LLC, 49240 State Hwy. 28, Morris, MN 56267
^c Dep. of Crop Sciences, Univ. of Illinois at Urbana-Champaign, 1102 S. Goodwin Ave., Urbana, IL 61801
^d USDA-ARS Soybean/Maize Germplasm, Pathology, and Genetics Research Unit, 1101 W. Peabody, Urbana, IL 61801
^e Syngenta Seeds Inc., Brookings, SD
^f USDA-ARS Soybean Genomics and Improvement Lab, Bldg. 006 BARC-West, 10300 Baltimore Ave., Beltsville, MD 20705

View larger version (23K): [in a new window]   Fig. 1. Leaf abscission in response to ethylene. The percentage of petioles that had abscised in response to a gentle touch was recorded at several intervals of time for Hobbit 87 and Hobbit 87 etr1–1 explants exposed to 25 µL L–1 ethylene in air at 25°C. The petioles were debladed before ethylene treatment. The abscission of petioles for the primary (unifoliate) leaves and true (trifoliate) leaves were recorded separately.

View larger version (26K): [in a new window]   Fig. 2. Relative leaf chlorophyll content estimated with a SPAD meter. The youngest fully expanded trifoliate leaf on each of 15 plants (1997) or 20 plants (1999) per plot was sampled on each date except the last date. Data are for one experimental site in each year (three blocks per experiment), and are graphed as mean and 95% confidence interval.