. A classification of the cultivated varieties of barley ... Barley. A Classification of the Cultivated Varieties of Barley 391 are of the greatest taxonomic value. Some intermediates between these stages have been described from time to time by different authors, especially Kornicke (1885). Most of these which were the results of crosses have proved to be unstable and have gone out of existence as varieties. Crosses between two of the above-named conditions of fertility give in the second generation practically all steps between the two parent types, but these intermediates have proved hetero
. A classification of the cultivated varieties of barley ... Barley. A Classification of the Cultivated Varieties of Barley 391 are of the greatest taxonomic value. Some intermediates between these stages have been described from time to time by different authors, especially Kornicke (1885). Most of these which were the results of crosses have proved to be unstable and have gone out of existence as varieties. Crosses between two of the above-named conditions of fertility give in the second generation practically all steps between the two parent types, but these intermediates have proved heterozygous in future generations and have broken up in a similar manner to the original first- generation cross. In the present classification, these four conditions of fertility are used as the first and most important character in the subdivision of cultivated barleys, for three reasons: (1) stability in all environmental conditions; (2) ease of recognition; and (3) weight given by all earlier A BCD Fig. 52. the structure of two-rowed barleys A, Dorsal view of third condition of fertility, where side spikelets are infertile but possess all structural parts except terminal appendage of lemma; B, ventral view of same; C, dorsal view of fourth condition of fertility, where side spikelets are very rudimentary; D, ventral view of same. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Wiggans, Roy Glen, 1891- [from old catalog]. [Ithaca
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbarley, bookyear1921
