New Zealand Journal of Agricultural Research abstracts

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Meiotic behaviour in natural diploid, tetraploid, and commercial diploid crested wheatgrass

Bilal Deniz

Department of Agronomy
Agricultural Faculty
Atatürk University
25240 Erzurum, Turkey

Unsal Dogru

Department of Animal Science
Agricultural Faculty
Atatürk University
25240 Erzurum, Turkey

Abstract   Chiasma frequencies and chromosome associations at diakinesis and first metaphase (MI) were studied in natural and commercial diploid Agropyron cristatum and natural tetraploid Agropyron desertorum crested wheatgrass plants. The frequencies of bivalents were 6.988 and 6.980 at diakinesis and 6.980 and 6.976 at MI in the natural and commercial diploids, respectively. The frequencies of bivalents and quadrivalents in the natural tetraploid were 7.728 and 3.072 at diakinesis, and their frequencies at MI were 7.880 and 2.984, respectively. A few univalents were formed at diakinesis and MI in the three crested wheatgrasses, and these were generally associated with trivalents at the two stages in the tetraploid. There were positive and significant correlations between the frequencies of chiasmata at diakinesis and those of chiasmata at MI in the three crested wheatgrasses. Tetraploid A. desertorum, in particular, is thought to be an important breeding material for future studies when growth performance and meiotic regularity are taken into consideration.

Keywords   autoploidy; crested wheatgrass; chromosome pairing; meiotic regularity; Agropyron desertorum; Agropyron cristatum; ‘Fairway’

A06009; Online publication date 3 October 2006.
Received 21 February 2006; accepted 3 August 2006

New Zealand Journal of Agricultural Research, 2006, Vol. 49: 405–409
0028–8233/06/4904–0405  © The Royal Society of New Zealand 2006

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