In:
Genome, Canadian Science Publishing, Vol. 37, No. 2 ( 1994-04-01), p. 181-189
Abstract:
A spreading technique for synaptonemal complexes (SCs) was applied to pollen mother cells of two aneuploid genotypes of autotriploid Lolium multiflorum (2n = 3x + 1 = 22). In the earliest nuclei analyzed the axial elements are in six groups of 3 and one group of 4. Most groups have formed multivalents with from one to five pairing partner exchanges, but there are also groups that have formed bivalents and univalents. Some axial elements have formed triple associations, in one case for the length of the trivalent. Unsynapsed axial elements remain aligned with their homologous SCs into pachytene, but this alignment is abolished as these axes pair heterologously among themselves until the entire axial element complement is synapsed. At metaphase I most chromosomes are associated as trivalents and quadrivalents.Key words: Lolium, triploid, pairing partner exchange, chiasma, multivalent.
Type of Medium:
Online Resource
ISSN:
0831-2796
,
1480-3321
Language:
English
Publisher:
Canadian Science Publishing
Publication Date:
1994
detail.hit.zdb_id:
2020635-5
SSG:
12