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The Loss in Yield that May be Expected from Planting Second Generation Double‐Crossed Seed Corn 1
Author(s) -
Richey Frederick D.,
Stringfield G. H.,
Sprague George F.
Publication year - 1934
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1934.00021962002600030003x
Subject(s) - sowing , yield (engineering) , division (mathematics) , crop , agriculture , agronomy , agricultural experiment station , agricultural science , mathematics , biology , physics , arithmetic , ecology , thermodynamics
Farmers have been advised generally against planting second-generation seed from corn hybrids which they have purchased or obtained in other ways. Most of this hybrid seed has been the first generation of either three-way or double crosses among selfed lines, and the advice relative to planting the progeny appears to have been based upon the theories of hybrid vigor and the demonstrated reduction in yield from the F 1 to the F~ in single crosses rather than on experiments with three-way and double crosses as such. It accordingly seemed worth while to obtain some definite evidence on the relative yields of F~’s and F~’s and the present paper reports such data.