Origin of Cultivated Oats<sup>1</sup>

Coffman, F. A.

doi:10.2134/agronj1946.00021962003800110007x

Cited by 27 publications

(9 citation statements)

References 5 publications

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“…Moreover, the morphology of the fatuoids (Baum, 1969b), which are mutations of A. sativa, reveals remarkable similarities in attributes of the lodicule, epiblast, and base of floret to A. sept entrionalis (Baum, 1972b). Coffman (1946) was the first to reject the former belief that A. fatua was the progenitor of the cultivated oats when he suggested A. sterilis instead. He also gave an extensive review of this subject in his 1946 paper.…”

Section: Discussionmentioning

confidence: 99%

Extrapolation of the Predomesticated Hexaploid Cultivated Oats

Baum¹

1973

Evolution

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Section: Discussionmentioning

confidence: 99%

Extrapolation of the Predomesticated Hexaploid Cultivated Oats

Baum¹

1973

Evolution

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“…The most surprising feature of the results is the high frequency of pollen mother cells with irregular meioticdivisionsinthecross4.ftyzcmJina x A.sterilis, since it has usually been considered (Trabut, 1914;Malzew, 1930;Coffman, 1946) that A. sterilis is the progenitor of A. byzantina. Again it must be noted that only single varieties of both A. byzantina and A. sterilis were used in the crosses, and it may also be that A. byzantina as typified by Red Rustproof has evolved not from A. sterilis subsp.…”

Section: Meiosisinf^abyzantina X Asativa Xa Sterilis and X A Fmentioning

confidence: 94%

“…Differences between varieties do apparently occur in the species A. byzantina as Florell (1931) found different results for the inheriSo far as the plant breeder is concerned it would seem that care will have to be taken in using A. byzantina x A. sativa crosses since the segregates from such crosses may be somewhat unstable owing to meiotic irregularities. Thus the American variety Clinton, selected from such a cross, has been found to produce many 'off-types' (Coffman, 1954). It would appear even to be better to use A. sterilis rather than A. byzantina i£A.…”

Section: Meiosisinf^abyzantina X Asativa Xa Sterilis and X A Fmentioning

confidence: 99%

“…It appeared, therefore, that a cytological investigation of _F X interspecific hexaploid oat hybrids, using both spring and winter varieties of A. sativa as parents, might give some information as to a possible difference in the origins of the two types of A. sativa. Coffman (1946) has given a full summary of the literature on the hypotheses for the origin of the cultivated hexaploid oats. Thus he pointed out that the present-day belief that A. sativa originated from A .fatua seems to have been based primarily upon the proposal of Haussknecht (1885), which was clarified later by Thellung (1912).…”

Section: Introductionmentioning

confidence: 99%

“…The scheme of Malzew (1930) for the origin of cultivated oats is similar to that of Haussknecht in that cultivated A. sativa is supposed to have originated from wild A. fatua and cultivated A. byzantina from wild A. sterilis. Coffman (1946), however, suggested that all the commonly cultivated hexaploid oats, A. sativa (including A. orientalis) and A. byzantina, have been derived from A. sterilis. Hunter & Carson (1949) in considering the origin of winter varieties of A. sativa suggested that they were derived from crosses of spring varieties of A. sativa x A. byzantina.…”

Section: Introductionmentioning

confidence: 99%

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Meiotic irregularities in hexaploid oats IV. Hybrids between Avena sativa (spring and winter varieties) A. fatua, A. sterilis, A. byzantina and A. nuda

Joshi¹,

Howard²

1955

J. Agric. Sci.

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1. Pollen mother cells with irregularities of meiosis were rare in the parent species and varieties, being usually less than 0·5% and the highest found being only 1·57% in the variety Grey Winter.2. F1A. fatua C.S. 473 (from Afghanistan) × Grey Winter had 33·5% of pollen mother cells with irregularities. On the other hand, the F1 hybrids of A. fatua (C.S. 46 (from Asia Minor) × both spring and winter varieties of A. sativa showed between 2·45 and 12·81% of irregular cells and were thus more regular than F1 spring variety of A. sativa × Grey Winter.3. F1A. sterilis × spring and winter varieties of A. sativa showed between 5·56 and 6·67% of cells with irregularities of meiosis.4. F1A. fatua C.S.46 × A. sterilis and F1A. nuda × A. sterilis had 5·65 and 7·60% of irregular cells respectively, but F1A. nuda × A.fatua C.S. 46 had 46·05%.5. All F1 hybrids with A. byzantina as one parent had high frequencies of pollen mother cells (from 59·12 to 88·45%).6. The commonest irregularity of meiosis was the occurrence of univalents. Multivalents were found at a high frequency only in the A. byzantina hybrids. Bridges and fragments were uncommon, occurring in not more than 2% of cells.7. The limitations of the cytological results in assessing the relationships between the different hexaploid species of oats are discussed. It would, however, appear that there is a close relationship between A. sativa (both spring and winter varieties), A.fatua (C.S. 46) and A. sterilis, but that A. byzantina is not closely related to that group.8. The importance of the results to the plant breeder is briefly indicated.

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