Soybean Pubescence Color Influences Seed Yield in Cool-Season Climates
- Malcolm J. Morrison ,
- Harvey D. Voldeng and
- Ron J. D. Guillemette
Soybean [Glycine max (L.) Merr.] pubescence color (gray or tawny) may influence the microclimate of the canopy and consequently the seed yield. The objectives of this research were to examine the influence of pubescence color on the seed yield of soybean. Yield data were collected from soybean with either gray or tawny pubescence grown in a regional adaptation trial for three years at three locations. Mean yield, yield stability, and general adaptability were examined to determine if pubescence color interacted with the climate to affect yield. In years or locations receiving >2600 corn heat units (CHU), soybean lines with gray pubescence had either significantly higher yield or the same yield as lines with tawny pubescence. In years or locations receiving <2600 CHU, however, tawny soybean had a significantly higher yield than gray soybean. In cool-season climates, soybean lines with tawny pubescence had greater seed yield stability and higher general adaptability than those with gray pubescence.
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