A chromosome of Hordeum chilense homoeologous to group 7 of wheat

1985 ◽  
Vol 27 (1) ◽  
pp. 101-104 ◽  
Author(s):  
T. E. Miller ◽  
S. M. Reader ◽  
C. C. Ainsworth
Keyword(s):  
Triticum Aestivum ◽  
Key Words ◽  
Isoelectric Focusing ◽  
Wheat Chromosome ◽  
Hordeum Chilense ◽  
Chromosome Substitution ◽  
Substitution Lines ◽  
Telocentric Chromosome ◽  
Chromosome Markers ◽  
Gel Isoelectric Focusing

Individual substitution lines have been produced with Hordeum chilense chromosome A substituted in turn for chromosome 7A, 7B, or 7D of Triticum aestivum. Telocentric substitutions with the α arm, substituted for chromosome 7A or 7D, or the β arm substituted for chromosome 7B have also been produced. The substitutions have been confirmed by the presence of a purple straw marker, by gel isoelectric focusing of α-amylase isozymes, and cytologically using telocentric chromosome markers. Chromosome A has consequently been designated 7Hch.Key words: Hordeum chilense, wheat, chromosome substitution, homoeology, α-amylase.

Chromosome instability in wheat plants regenerated from suspension culture

Genome ◽  
1987 ◽  
Vol 29 (4) ◽  
pp. 627-629 ◽  
Author(s):  
George Fedak ◽  
K. C. Armstrong ◽  
R. J. Handyside
Keyword(s):  
Triticum Aestivum ◽  
Suspension Culture ◽  
Key Words ◽  
Chinese Spring ◽  
Meiotic Chromosome ◽  
Chromosome Instability ◽  
Wheat Chromosome ◽  
Chromosome Behaviour ◽  
Meiotic Configuration ◽  
Culture Suspension

Plants of Triticum aestivum cv. Chinese Spring were regenerated from 30 calli obtained from suspension cultures. All four plants showed abnormal meiotic chromosome behaviour relative to the control. The average meiotic configuration over all plants was 1.55 I + 18.16 II + 0.30 III + 0.82 IV. In addition, an isochromosome was frequently observed in cells of all plants, which was indicative of centromeric breaks. Key words: culture (suspension), wheat, chromosome instability.

Vernalization and photoperiodic responses of selected chromosome substitution lines derived from 'Rescue', 'Cadet', and 'Cypress' wheats

1985 ◽  
Vol 27 (5) ◽  
pp. 586-591 ◽  
Author(s):  
D. W. A. Roberts ◽  
R. I. Larson
Keyword(s):  
Triticum Aestivum ◽  
Chromosome Substitution ◽  
Substitution Lines ◽  
Vegetative Phase ◽  
Chromosome Substitution Lines ◽  
Chromosome 5B ◽  
Photoperiodic Responses

The vernalization responses of 'Rescue', 'Cadet', 'Cypress', and selected chromosome substitution lines derived from these cultivars were measured by comparing days to ear emergence of vernalized and unvernalized plants under 24- and 16-h photoperiods. The genotype of 'Cadet' appears to be Vrn1Vrni1, vrn4vrn4, vrnxvrnx (where vrnx is an unidentified locus), and of 'Rescue' vrn1vrn1, Vrn3Vrn3, Vrn4Vrn4. 'Cypress' appears to carry Vrn4 and one or both of vrn1, and vrn3. Although some minor photoperiod responses were observed, no loci involved in major photoperiod responses were detected on chromosomes 5A, 4B, and 5B in 'Rescue' or 'Cadet' or on chromosome 5B in 'Cypress'. However, the duration of the basic vegetative phase appears to be controlled by a locus or loci on chromosome 5B, and chromosomes 5A and 4B may be involved in minor photoperiodic responses.Key words: Triticum aestivum, vernalization, photoperiod responses.

CHROMOSOMES OF CHINESE SPRING WHEAT CARRYING GENES FOR CROSSABILITY WITH BETZES BARLEY

1982 ◽  
Vol 24 (2) ◽  
pp. 227-233 ◽  
Author(s):  
George Fedak ◽  
Perry Y. Jui
Keyword(s):  
Triticum Aestivum ◽  
Hordeum Vulgare ◽  
Chinese Spring ◽  
Seed Set ◽  
Triticum Aestivum L ◽  
Chromosome Substitution ◽  
Substitution Lines ◽  
Hordeum Vulgare L ◽  
Chromosome Substitution Lines ◽  
Chinese Spring Wheat

Chromosome substitution lines of the variety Hope in Chinese Spring (Triticum aestivum L.) were crossed onto Betzes barley (Hordeum vulgare L. emend. Lam.). Three substitution lines of Hope involving chromosomes 5A, 5B, 5D gave no seed-set indicating that their counterparts in Chinese Spring were responsible for crossability with barley and that they function in complementary fashion. Other chromosomes of Hope had minor effects on crossability with barley.

Chromosomes in 'Cadet' and 'Rescue' wheats carrying loci for cold hardiness and vernalization response

1986 ◽  
Vol 28 (6) ◽  
pp. 991-997 ◽  
Author(s):  
D. W. A. Roberts
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Cold Hardiness ◽  
Rank Order ◽  
Triticum Aestivum L ◽  
Wheat Cultivars ◽  
Chromosome Substitution ◽  
Vernalization Response ◽  
Substitution Lines ◽  
Chromosome Substitution Lines

'Rescue', 'Cadet', and the 42 reciprocal chromosome substitution lines derived from these two spring wheat cultivars were tested for vernalization response and cold hardiness. Cold hardiness was tested after hardening under a 16-h day for 8 weeks with 6 °C day and 4 °C night temperatures or in the dark for 7 weeks at 0.8 °C followed by 8 weeks at −5 °C. Chromosomes 5A, 5B, 7B, and possibly 2A carried loci for vernalization response. Chromosomes 2A, 5A, and 5B carried loci affecting cold hardiness measured after 8 weeks in the light at 6 °C during the day and 4 °C at night, whereas chromosomes 6A, 3B, 5B, and 5D were involved in cold hardiness after hardening in the dark at 0.8 °C followed by −5 °C. The results suggest that the rank order of cultivars for cold hardiness depends on the hardening technique used since the two different techniques tested had different genetic and presumably somewhat different biochemical bases.Key words: Triticum aestivum L., cold hardiness, vernalization.

Locating the Agropyron segment in wheat–Agropyron transfer no. 12

Genome ◽  
1987 ◽  
Vol 29 (2) ◽  
pp. 365-366 ◽  
Author(s):  
G. C. Eizenga
Keyword(s):  
Triticum Aestivum ◽  
Key Words ◽  
Leaf Rust ◽  
Chromosome Pairing ◽  
Wheat Chromosome ◽  
Triticum Aestivum L ◽  
Puccinia Recondita ◽  
Agropyron Elongatum ◽  
Transfer Lines ◽  
Puccinia Recondita Tritici

Twelve lines of wheat (Triticum aestivum L.) were originally identified as having a segment of Agropyron elongatum chromatin carrying a gene for resistance to leaf rust (Puccinia recondita tritici) transferred to wheat chromosome 7D. By studying the chromosome pairing of one of these lines, transfer no. 12, with telosomes 7AL, 7AS, 7BL, 7BS, 7DL, 7DS, and 7AgS, it was determined that the Agropyron chromatin was carried on the long arm of wheat chromosome 7A rather than 7D. This determination was confirmed by acetocarmine–N-banding. Key words: Triticum aestivum, Agropyron elongatum, transfer lines, Puccinia recondita tritici, telosomic analysis.

Microsatellites confirm the authenticity of inter-varietal chromosome substitution lines of wheat (Triticum aestivum L.)

2000 ◽  
Vol 101 (1-2) ◽  
pp. 95-99 ◽  
Author(s):  
E. Pestsova ◽  
E. Salina ◽  
A. Börner ◽  
V. Korzun ◽  
O. I. Maystrenko ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Triticum Aestivum L ◽  
Chromosome Substitution ◽  
Substitution Lines ◽  
Chromosome Substitution Lines
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