C-banding pattern and meiotic pairing in five rye chromosomes of hexaploid triticale

1982 ◽  
Vol 61 (3) ◽  
pp. 233-237 ◽  
Author(s):  
T. Naranjo ◽  
J. R. Lacadena
Keyword(s):  
Banding Pattern ◽  
Meiotic Pairing ◽  
Hexaploid Triticale ◽  
C Banding

Changes in triticale chromosome heterochromatin visualized by C-banding

Genome ◽  
1989 ◽  
Vol 32 (5) ◽  
pp. 735-742 ◽  
Author(s):  
Nicolas Jouve ◽  
Carmen Galindo ◽  
Montserrat Mesta ◽  
Fernando Diaz ◽  
Beatriz Albella ◽  
...  
Keyword(s):  
Morphometric Analysis ◽  
Banding Pattern ◽  
Tetraploid Wheat ◽  
Relative Length ◽  
Hexaploid Triticale ◽  
C Banding ◽  
Polymorphic Bands ◽  
High Level ◽  
Heterochromatin Content

The distribution and characterization of heterochromatin in a series of cultivars, parents, new amphiploids and progeny of hexaploid triticale were comparatively studied using C-banding and morphometric analysis. A high level of intervarietal polymorphism was detected for the banding pattern. The chromosome pairs 4A and 1R presented the most constant pattern of heterochromatin distribution among 31 triticale lines studied. A total of 126 bands have been catalogued, from which 28, 59, and 39 belong, respectively, to the A, B and R genomes. The ratio of polymorphic bands per genome was 23/28, 36/59, and 30/39. The chromosomes displayed heterochromatin modifications consistent in both presence–absence and relative length of their content per genome, when passed from the parents to the amphiploids. Variations in the heterochromatin were also observed among sister plants coming from crosses between wheat and triticale. The heterochromatin content showed gradual tendencies either to increase or decrease in each genome during successive self-cross generations after that cross. The existence of a systematic process of variation of heterochromatin content in triticale is assumed, and the nature of this phenomenon is discussed.Key words: triticale, tetraploid wheat, rye, C-banding, heterochromatin.

Rye C-banding patterns and meiotic stability of hexaploid triticale (× Triticosecale) selections differing in kernel shriveling

Genome ◽  
1990 ◽  
Vol 33 (5) ◽  
pp. 686-689 ◽  
Author(s):  
Charles M. Papa ◽  
R. Morris ◽  
J. W. Schmidt
Keyword(s):  
Secale Cereale ◽  
Chromosome Banding ◽  
Agronomic Performance ◽  
Hexaploid Triticale ◽  
Kernel Development ◽  
Banding Patterns ◽  
C Banding ◽  
Meiotic Stability ◽  
Metaphase I

Two winter hexaploid triticale populations derived from the same cross were selected on the basis of grain appearance and agronomic performance. The five lines from 84LT402 showed more kernel shriveling than the four lines from 84LT401. The derived lines were analyzed for aneuploid frequencies, rye chromosome banding patterns, and meiotic stability to detect associations with kernel development. The aneuploid frequencies were 16% in 84LT401 and 18% in 84LT402. C-banding showed that both selection groups had all the rye chromosomes except 2R. The two groups had similar telomeric patterns but differed in the long-arm interstitial patterns of 4R and 5R. Compared with lines from 84LT402, those from 84LT401 had significantly fewer univalents and rod bivalents, and more paired arms at metaphase I; fewer laggards and bridges at anaphase I; and a higher frequency of normal tetrads. There were no significant differences among lines within each group for any meiotic character. Since there were no differences within or between groups in telomeric banding patterns, the differences in kernel shriveling and meiotic stability might be due to genotypic factors and (or) differences in the interstitial patterns of 4R and 5R. By selecting plump grains, lines with improved kernel characteristics along with improved meiotic stability are obtainable.Key words: triticale, meiotic stability, C-banding, Secale cereale, heterochromatin.

C-Banding Pattern and Satellite DNA Localization on the Chromosomes ofOryzomys Flavescens(Rodentia, Cricetidae)

Caryologia ◽  
1988 ◽  
Vol 41 (3-4) ◽  
pp. 323-328 ◽  
Author(s):  
L. Vidal Rioja ◽  
T.G. de Fronza ◽  
R. Wainberg ◽  
N. Brum-Zorrilla ◽  
F. Wallace ◽  
...  
Keyword(s):  
Banding Pattern ◽  
Satellite Dna ◽  
C Banding

C-banding in meiosis: an approach to the study of wheat and rye genome interactions in triticale

Genome ◽  
1989 ◽  
Vol 32 (6) ◽  
pp. 1074-1078 ◽  
Author(s):  
C. Galindo ◽  
N. Jouve
Keyword(s):  
Tetraploid Wheat ◽  
Meiotic Behaviour ◽  
Giemsa Banding ◽  
Hexaploid Triticale ◽  
C Banding ◽  
Triticale Line ◽  
The Individual ◽  
Genome Interactions

Meiosis in four primary hexaploid triticale lines, in their component two tetraploid wheat and two rye parents, and in the hybrids obtained by crossing within each ploidic level was studied using Giemsa banding. The individual chromosomes were identified and their meiotic behaviour at first metaphase was analyzed in each line. In each new triticale line, the level of pairing for wheat chromosomes was moderately reduced and for rye chromosomes was very significantly reduced, in comparison with that of the wheat and rye parents used to synthesize it. The pairing intensity observed suggests the presence of a strong negative intergenomic interaction between the rye and wheat genomes in triticale, irrespective of whether the rye is in a homozygous or heterozygous genotypic condition. The homozygosity or heterozygosity in the wheat constituent does not appear to effect the behaviour of the rye chromosomes in triticale.Key words: triticale, meiosis, C-banding, heterosis.

scholarly journals Giemsa C-banding pattern in some cultivars of Trichosanthes dioica Roxb.

CYTOLOGIA ◽  
1987 ◽  
Vol 52 (3) ◽  
pp. 419-423 ◽  
Author(s):  
Dilip De Sarker ◽  
Kalyan B. Datta
Keyword(s):  
Banding Pattern ◽  
C Banding ◽  
Trichosanthes Dioica

Karyotype and C-banding Pattern of the Domestic Geese Anser anser Populations (Aves: Anatidae) in Egypt

2014 ◽  
Vol 62 (1) ◽  
pp. 47-56 ◽  
Author(s):  
Adel A. Basyouny Shahin ◽  
Abdel Tawab Mohammed Ata ◽  
Anwaar S. Mohammed Abu Shnaf
Keyword(s):  
Banding Pattern ◽  
Anser Anser ◽  
C Banding

The origin of wheat chromosomes 4A and 4B and their genome reallocation

1983 ◽  
Vol 25 (3) ◽  
pp. 210-214 ◽  
Author(s):  
J. Dvořák
Keyword(s):  
Triticum Aestivum ◽  
Banding Pattern ◽  
The Other ◽  
Evolutionary Lineage ◽  
C Banding ◽  
B Genome ◽  
A Genome

Triticum aestivum chromosome "4A" is, like the B genome chromosomes, extensively heterochromatic while the remaining six A genome chromosomes are not. In the presence of the Ph gene it does not pair with any chromosome of einkorn wheats, T. monococcum and T. urartu, the source of the A genome. It is shown here that the same chromosome is also present in T. timopheevii which represents the other evolutionary lineage of wheats. The "4A" chromosomes of T. timopheevii and T. aestivum pair poorly with each other, like the B genome chromosomes of the two lineages, while the remaining A genome chromosomes, except for one arm, pair relatively well. Hence, in both lineages chromosome "4A" has the attributes of the B genome chromosomes, not of the A genome chromosomes. The C-banding pattern of chromosome "4A" of T. aestivum and T. timopheevii closely resembles the C-banding pattern of a chromosome of T. speltoides and less closely chromosome 4B1 of T. sharonense. On the basis of this and other evidence it is concluded that this chromosome was contributed by a species of the section Sitopsis and, consequently, belongs to the B genome. Additionally, there is evidence that the chromosome that was originally designated "4B" belongs to the A genome.

CHROMOSOME PAIRING IN HEXAPLOID TRITICALE

1971 ◽  
Vol 13 (3) ◽  
pp. 621-624 ◽  
Author(s):  
J. B. Thomas ◽  
P. J. Kaltsikes
Keyword(s):  
Durum Wheat ◽  
Normal Level ◽  
Chromosome Pairing ◽  
Tetraploid Wheat ◽  
Meiotic Pairing ◽  
Hexaploid Triticale ◽  
Secale Montanum

A durum wheat background was shown to suppress the meiotic pairing of chromosomes of Secale montanum Guss. with homoeologues of S. cereale L. in hexaploid triticale. This effect was attributed to the activity of the 5BL diploidising system, apparently active in tetraploid wheat. It was considered unlikely that the SBL system was important in conditioning the normal level of pairing failure found in disomic triticales.

Sign in / Sign up

Export Citation Format

Share Document