New Zealand Journal of Agricultural Research abstracts
Seed set and some cytological characters in different generations
of
autotetraploid perennial rye (Secale montanum Guss)
İlknur Akgün
Süleyman Demirel University
Faculty of Agriculture
Department of Field Crops
Isparta, Turkey
iakgun@ziraat.sdu.edu.tr
Metin Tosun
Atatürk University
Faculty of Agriculture
Department of Field Crops
Erzurum, Turkey
Abstract Artificial autotetraploids of diploid
perennial rye
(Secale montanum Guss) plants were obtained by colchicine
treatment. C1, C2 and C3 generations
of autotetraploid perennial rye were compared for seed set and
cytological characteristics such as irregularities in metaphase I
(univalents) and anaphase I and II (lagging chromosomes and/or
chromatids and bridge formation) and micronuclei in tetrads. In the
three generations (C1, C2 and C3) the
percentage of cells with univalents was 18.51, 14.56 and 9.38%
respectively. The percentage of cells with irregular anaphase I with
univalents was 23.43, 15.93 and 7.85%, and for anaphase II cells it was
20.93, 16.47 and 7.16. The percentage of tetrads with micronuclei was
18.17, 14.07 and 6.17% and seed set was 27.72, 43.51 and 59.59%
respectively. A negative correlation was found between seed set and the
cytological characteristics investigated. The correlations among the
characters investigated during meiosis division were statistically
significant. Selection of vigorous plants of autotetraploid perennial
rye increased seed setting by increasing the cytological balance.
However, abnormalities in the early stage of meiosis division were
reflected in the later stages of meiosis.
Keywords meiotic irregularities; seed set;
tetraploid
Secale montanum Guss
A06038; Online publication date 4 July 2007; Received 12 June 2006;
accepted 1 May 2007
New Zealand Journal of Agricultural Research, 2007, Vol. 50:
339–346
0028–8233/07/5003–0339 © The Royal Society of New Zealand 2007
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