Premium
Genetic Control of Hypocotyl Pigmentation among White‐Flowered Soybeans Grown in Continuous Light 1
Author(s) -
Palmer R. G.,
Payne R. C.
Publication year - 1979
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1979.0011183x001900010033x
Subject(s) - hypocotyl , biology , botany , seedling , hybrid , cultivar , horticulture
Seedlings of 64 white‐flowered soybean ( Glycine max L. Merr.) plant introductions, cultivars, and genetic lines were grown in continuous light of 505 μEm −3 S −1 . Tawny ( T _ Td _) pubescent genotypes (22 samples) and light‐tawny ( T _ td td ) pubescent genotypes (20 samples) had bronze pigmentation on the hypocotyl shortly after emergence. Gray ( t t Td _ or t t td td ) pubescent genotypes (22 samples) had no detectable bronze pigmentation. Reciprocal F 1 hybrids of tawny pubescent plants and gray pubescent plants had bronze hypocotyl color and tawny pubescence. In the F 2 generation, plants with bronze hypocotyl color invariably had tawny pubescence, while all plants with green hypocotyls had gray pubescence. The T locus has a pleiotropic effect on hypocotyl color and on pubescence color which was detected in white‐flowered soybeans. This relationship was constant in all tested populations and suggests a simple, rapid, and inexpensive method of detecting certain off‐types in whiteflowered soybean populations at the seedling stage.