New Zealand Journal of Agricultural Research abstracts
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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