Project Number: 3611-21000-027-04
Start Date: Apr 01, 2012
End Date: Mar 31, 2014
We will do detailed comparisons of pod temperatures (10 cultivars) during seed development using a thermocouple (slower and requires contact with pod) and IR thermogun (faster and does not require physical contact). If differences are confirmed again in 2011, we will consider possible physiological mechanisms (e.g., transpirational cooling) and physical factors (e.g., pubescence, color). We will also screen 180 selected accessions from the USDA Soybean Germplasm Collection for oil content at the top and bottom of the canopy. Accessions that have high overall oil content and a strong canopy position effect, will be identified in the summer of year 1 and during the winter, crosses will be made with genotypes that have a small canopy position effect (low delOIL). The progeny of these crosses will be examined in the summer of year 2 for bulk oil content and canopy position effects.