Key points are not available for this paper at this time.
E. S. MCFADDEN, E. R. SEARS; THE ORIGIN OF TRITICUM SPELTA AND ITS FREE-THRESHING HEXAPLOID RELATIVES*, Journal of Heredity, Volume 37, Issue 3, 1 March 1946, P
McFadden et al. (Fri,) studied this question.
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