Based on the recent literature concerning the oats and on the evaluation of 25 species VIR world collection of genus Avena L. under field conditions and different laboratory methods were confirmed that the genus can be divided up into two subsectios of sectio Euavena: Aristulatae Malz. and Denticulatae Malz. agrees closely with the results of Malzev (1930). Perennial autotetraploid A.macrostachya Bal. belongs to sectio Avenastrum. Subsectio Aristulatae includes diploid species A.clauda, A.pilosa (series Iqualiglumis Malz.); A.longiglumis, A.prostrata, A.damascena (series Stipitatae Malz.); A.wiestii, A.hirtula, A.atlantica and cultivated A.strigosa (series Ibericae Mordv.); tetraploid species A.barbata, A.vaviloviana and cultivated A.abyssinica (series Eubarbatae Malz.). Subsectio Denticulatae includes diploids species A.bruhnsiana, A.ventricosa, A.canariensis; tetraploid species A.agadiriana, A.magna, A.murphyi, A.insularis (lately described by Ladizinsky); hexaploid species A.fatua, A.occidentalis, A.sterilis, A.ludoviciana and cultivated A.byzantina, A.sativa (see Table).
It is suggested that the evolutionary pathway of species of series of Iqualiglumis Malz., Stipitatae Malz., cultivated species A.strigosa and A.abyssinica apparently reached their evolutionary climax. On the basis of detailed morphology, distribution and ecology we concluded that diploids and tetraploids of Denticulatae were involved in the evolution of hexaploid wild and cultivated oats.
| Subsection |
Species |
2n |
Genome |
| Wild |
Cultivated |
| Floret disarticulation |
Spikelet disarticulation |
| Aristulatae Malz. |
A.clauda Dur. |
A.pilosa M.B. |
|
14 |
Cp |
| |
A.prostrata Ladiz. |
|
|
|
Ap |
| |
A.damascena Raj.et Baum |
|
|
|
Ad |
| |
A.longiglumis Dur. |
|
|
|
Al |
| |
A.wiestii Steud. |
A.atlantica Baum |
|
|
As |
| |
A.hirtula Lag. |
|
A.strigosa Schreb. |
|
|
| |
A.barbata Pott. |
|
|
28 |
AB |
| |
A.vaviloviana Mordv. |
|
A.abyssinica Hoch. |
|
|
| Denticulatae Malz. |
|
A.ventricosa Bal. |
|
14 |
Cv |
| |
|
A.bruhnsiana Grun. |
|
|
|
| |
|
A.canariensis Baum |
|
|
Ac |
| |
|
A.agadiriana Baum et Fed. |
|
28 |
AB? |
| |
|
A.magna Mur.et Terr. |
|
|
AC |
| |
|
A.murphyi Ladiz. |
|
|
|
| |
|
A.insularis Ladiz. |
|
|
CD? |
| |
A.fatua L. |
A.sterilis L. |
A.byzantina Koch |
42 |
ACD |
| |
A.occidentalis Dur. |
A.ludoviciana Dur. |
A.sativa L. |
|
|
On the taxonomy of genus Avena L. |
 |
