New Zealand Journal of Agricultural Research abstracts
Test weight, kernel shrivelling, and aneuploidy frequency in triticale
Metin Tosun
Kamil Haliloğlu
M. Sinan Taşpinar
Sevim Sağsöz
University of Atatürk
Faculty of Agriculture
Department of Field Crops
Erzurum, Turkey
email: mtosun@atauni.edu.tr
Abstract Kernel shrivelling is one of the main problems
in kernel appearance and test weight that cause yield loss. Aneuploidy frequency
and its relationship with kernel shrivelling were determined in four triticale
genotypes. Firstly, genotypes were divided into two main groups based on
their test weights. Secondly, these two groups were subdivided into two subclasses
based on kernel appearance. While euploids rate was 100% in plump kernels
of high test weight genotypes, this rate was 92 and 94% respectively in a
group of shrivelled kernels. Ploidy levels of 2n = 40 and 2n = 41 were observed
in aneuploids. A ploidy of 2n = 40 chromosomes was not observed in the plump
kernel group of high test weight genotypes, but in the shrivelled kernel
group made up 1%. While there were no aneuploids in the plump kernel group
of high test weight genotypes, the aneuploidy rate was 7% in the shrivelled
kernel group of same genotypes. On the other hand, the aneuploidy rate was
8 and 13% in the plump and shrivelled kernel groups of low test weight genotypes,
respectively.
Keywords triticale; test weight; kernel shrivelling;
aneuploidy
For somatic chromosome counts, 75 seeds from each class were germinated
on moist filter paper in A02033 Received 14 June 2002; accepted 6 November
2002; published 26 March 2003
New Zealand Journal of Agricultural Research, 2003, Vol. 46:
27-30 0028-8233/03/4601-0027 $7.00/0 © The Royal Society of
New Zealand 2003
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