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Classification of American Wheat Varieties

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Classification of American Wheat Varieties ^1^ J4.^t.^^^' UNITED STATES DEPARTMENT OF AGRICULTURE BULLETIN No. 1074 /^- ^ "^A 3 ~ ^ — , — Washington, D. C. Issued November 8, 1922; revised August, 1923 CLASSIFICATION OF AMERICAN III,. ^ WHEAT VARIETIES By J. ALLEN CLARK, Agronomist in Charge, JOHN H. MARTIN, Agronomist, Western Wheat Investigations, and CARLETON R. BALL, CereaUst in Charge, Office of Cereal Investigations, Bureau of Plant Industry CONTENTS Page Page Necessity for a Classiflcation of Wheat, 1 Classification of the Genus Triticum . 48 Previous Investigations 2 Key to the Species or Subspecies . 50 Foreign Classifications 3 Common Wheat 50 American Classifications 7 Club Wheat 172 Summary of Previous Classifications . 9 Poulard Wheat igo Present Investigations 10 Durum Wheat iga Classification Nurseries ....... 11 Emmer. 193 Preparing Descriptions, Histories, and Spelt 195 Distributions 15 Polish Wheat 197 Varietal Nomenclature 17 Einkorn 193 Unidentified Varieties 199 The Wheat Plant 22 Estimated Acreage of Varieties 207 Morphological Characters 23 Literature Cited 219 Physiological Characters 47 Index to Varieties and Synonyms.... 231 WASHINGTON GOVERNMENT PRINTING OFFICE 1922 UNITED STATES DEPARTMENT OF AGRICULTURE BULLETIN No. 1074 Washington, D. C. Issued November 8, 1922; revised August, 1923 CLASSIFICATION OF AMERICAN WHEAT VARIETIES. By J. ALLEN CLARK, Agronomist in Charge, JOHN H. MARTIN, Agronomist, Western Wheat Investigations, and CARLETON R. BALL, Cerealist in Charge, Oßce of Cereal Investigations, Bureau of Plant Industry. CONTENTS. Page. Page. Necessity for a classification of wheat_ í Classification of the genus Triticum_ 48 Previous investigations 2 Key to the species or bubspecies- 50 Foreign classifications- 3 Common wheat 50 American classifications 7 Club wheat .^ 172 Summary of previous classifica- Poulard wheat iso tions 9 Durum wheat i83 Present investigations 10 Emmer 193 Classification nurseries 11 Spelt _ 195 Preparing descriptions, histories, Polish wheat 197 and distributions 15 Einkorn 193 Varietal nomenclature 17 Unidentified varieties 199 The wheat plant . 22 Estimated acreage of varieties 207 Morphological characters 23 Literature cited 219 Physiological characters 47 Index to varieties and synonyms 231 NECESSITY FOR A CLASSIFICATION OF WHEAT. The varieties of wheat grown in the United States show a great diversity of type. This diversity is natural, a^ wheat is produced commercially in all of the 48 States of the Union, under a wide range of environmental conditions. More than 200 distinct varieties are grown. Many of these are adapted only locally, while others are well adapted to a wide range of varying conditions. This adapta- tion of a variety is an important factor, as it affects the yield and profitableness of the crop. The choice of varieties for given condi- tiofas and purposes, therefore, usually is given careful consideration by growers. The choice, however, is dependent upon the determina- tion of identity. 95539'—22—Bull. 1074 1 ^ 2 BirLI^TIN 1Ô74, U. S. DEPARTMENT OF AGRICULTURE. The identification of varieties requires some knowledge of the appearance of plant and kernel and is assisted by information regard- ing its history or distribution. Wheat varieties are most generally designated by names, which are established through publication ^d usage. The association of a name with a recognized type of wheat enables identification. Confusion in names is frequent, especially in America, where the number of actual varieties is very large. This confusion occurs in two principal ways: (1) The same name is ap- plied to very different varieties in différent parts of the country, and (2) the same variety is grown under several different names in dif- ferent parts of the country or even in the same part. Identification is difficult in cases of similar or closely related varieties and is con- fused by the multiplicity of names. There is need, therefore, for a practical and usable system of classi- fication which will standardize the varietal nomenclature and enable growers to identify varieties with which they are concerned. The purpose of this bulletin is to provide such a classification of the wheat varieties that are grown commercially in the-United States or may be grown soon. The classification has been made by using only such characters as can be distinguished by the naked eye, no instrument other than a measuring rule having been used in the investigations. The names of varieties have been standardized in accordance with a code of nomenclature prepared by Ball and Clark {JßY and adopted with slight changes by the American Society of Agronomy. This bulletin is written in response to a demand for varietal infor- mation from farmers, agronomists, plant breeders, and members of the grain trade. It should form the basis for future work in wheat improvement, save the time and expense of breeding for combina- tions of characters which are already in existence, prevent much duplication of work in conducting varietal experiments, and aid in preventing the fraudulent or unknown exploitation of old varieties of wheat under new names. Its greatest value, however, should be in providing a compendium of the wheats of North America for all workers in the wheat industry, especially those who have only a limited or local knowledge of the varieties which are grown. PREVIOUS INVESTIGATIONS. Most of the systematic study of wheat varieties has been done by foreign investigators. Comparatively little work of this nature has heretofore been done in America. iThe numbers (italic) in parentheses refer to '* Literature cited," at the end of this bulletin. CLASSIFICATION OF AMEBICAN WHEAT VARIETIES. 3 FOREIGN CLASSIFICATIONS.* The existence of many different varieties of wheat has been recog- nized for more than 2,300 years. Theophrastus {189), a pupil of Plato, in his " Enquiry into Plants," written about 300 B. C, states: There are many kinds of wheat which take their names simply from the places where they grow, as Libyan, Pontic, Thraeian, Assyrian, Egyptian Sicilian. They show difCerences in color, size, form, and individual character, and also as regards their capacities in general and especially their value as food. Theophrastus mentioned many of the differences between these kmds of wheat. In the writings of Varro, Pliny, and Columella, in Üie first century B. C. and the first century A. D., the observations of Theophrastus were repeated, rearranged, and amplified. Columella who wrote about 55 A. D. (7^, trans. 1745), presents these previous observations and his own, as follows : Trittcum, common bare wheat which has little husk upon it, was, according to Varro, a name given formerly to all sorts of grain beaten or bruised out of ears by trituration or thrashing; but afterwards it was given to a peculiar species of grain, of which there are many sorts, which take their name from the places where they grow; as African, Pontic, Assyrian, Thraeian, Egyptian Slliclan, etc., which differ from one another in color, bigness, and other prop- erties too tedious to relate. One sort has its ears without beards and is either of winter or summer. Another sort is armed with long beards and grows up sometimes with one, sometimes with more ears. Of these the grains are of dif- ferent sorts; some of them are white, some reddish, some round, others oblong some large, others small. Some sorts are early ripe, others late in ripening- some yield a great Increase, some are hungry and yield little; some put forth a great ear, others a small. One sort stays long in the hose ; another frees itself very soon out of it. Some have a small stalk or straw ; others have a thick one as the African. Some are clothed with few coats, some with many, as the Thraeian Some grains put forth only one stalk, some many stalks. Some require more' some less time to bring them to maturity. For which reason some are called trvm^strian, some Mmestrian; and they say that in Euboea there is a sort which may be brought to perfection in 40 days; but most of these sorts which ripen m a short time are light, unfruitful, and yield very little, though they are sweet and agreeable to the taste and of easy digestion. In the early Roman literature mentioned reference is found to two groups of wheat, namely, triticum and adoreum, or far. Columella referred to the far as bearded wheat. The grain of triticum was (a) Australia. Institute of science and industry A classifiratinn n«/« /i^4-.n ^ ^ ecrlptlon oí ..me of the wheat« of Australia. Australia Ins tSd and înaut Bm it andtj^J^Si. described *i m•'" a-^^ manner '^'^- similar. ^«"^t^-^S" to that °f used ü>« byleading the writers wheats of AustralL are'cfassifl^'«assifled (b) Perdval, John. The Wheat Plant, x 463 D 22S fiir n„ +„.,* ., , > (1»21.) Bibliography, p. 441-453. A Ur,. nZlj-ot '^.!Ít y^i'Z :t tl^TX^ are described and classified and the morphology of the wheat pllndt^sid fully ta.^:nr;rwrt^orr;irxirin-^^^^^^ mary, p. 183-210 (175-202). ' ^ " ^^^^- ^"^ ""'""*°- ^°sHsh sum- 4 BULLETIN 1074, U. S. DEPARTMENT OF AGRICULTURE. separated from the chaff in thrashing, while that of the far was not, indicating that the former consisted of true wheats, while the latter was emmer or spelt. Columella himself recognized three types of Triticimi, rolus (red), siligo (white), and trimestrian (spring), and in addition four types of bearded wheat (spelt or emmer), viz: CUsinian, of a shining, bright, white colour ; a bearded wheat, which is called venunculum. One sort of it is of a fiery-red colour and another sort of it is white; the trimestrian seed, or that of 3 months' growth, which is caUed halicastrum. It is evident from these quotations that many of the leading char- acters of the wheat plant were recognized in this early period. What attention was given to studies of wheat during the Dark Ages no one can say. With the revival of learning the botanists and medical men began the publication of the folio and royal octavo herbáis, many of them illustrated with woodcuts.
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