I.2 Help: Does anyone have a seedstock blbl bl2bl2?
The factors that condition blue aleurone color in barley have been reported to be complementary, segregating in a 9:7 ratio (Myler and Stanford, 1942). To evaluate blue aleurone as preflowering selective genes for male sterility in hybrid systems (Eslick, in press), it is desirable to have available a double recessive tester stock (blbl bl2bl2). Such a genotype would be expected in the white segregates of the F2 of the dihybrid cross, or in white aleurone varieties, at a frequency of 1 out of 7. However, in testing at least 130 white seeded lines and varieties, no double recessives have been detected. Each stock tested has been of the BlBl bl2bl2 or blbl Bl2Bl2 genotype. The number of observations required in order that at least one double recessive be detected at the .999 level of probability is 44. Can anyone verify the existence of the blbl bl2bl2 genotype? If so, would they please contact Greg Kushnak, Dept of Plant and Soil Science, Montana State University, Bozeman, Montana 59715.
Eslick, R. F., (in press). Barley Genetics II, Proceedings of Second Barley Genetics Symposium.
Myler, J. L., and E. H. Stanford, (1942). J. Am. Soc. Agron., 35: 427-436.