Some Useful Characters Implicated in Tolerance to Low Phosphorus and Water Stresses in Hexaploid Triticale x Bread Wheat Derivatives

2000 ◽  
Vol 28 (1-2) ◽  
pp. 117-121 ◽  
Author(s):  
R. K. Gautam ◽  
G. S. Sethi ◽  
P. Plaha
Keyword(s):  
Bread Wheat ◽  
Hexaploid Triticale ◽  
Low Phosphorus

Introduction of the D-genome chromosomes from bread wheat into hexaploid triticale with a complete rye genome

Genome ◽  
1987 ◽  
Vol 29 (3) ◽  
pp. 425-430 ◽  
Author(s):  
A. J. Lukaszewski ◽  
B. Apolinarska ◽  
J. P. Gustafson
Keyword(s):  
Key Words ◽  
Bread Wheat ◽  
Hexaploid Triticale ◽  
Genome Chromosome ◽  
D Genome ◽  
Homozygous Condition ◽  
C Banding ◽  
B Genome ◽  
Chromosome Substitutions ◽  
Triticosecale Wittmack

Hexaploid triticale (× Triticosecale Wittmack) lines selected from the progeny of octoploid × tetraploid triticale hybrids were karyotyped using C-banding. The number of D-genome chromosome pairs substituted for A- and (or) B-genome chromosomes ranged from 0 to 4, averaging 2.1 substitutions per line. Every D-genome chromosome was present in at least 1 of the 70 lines analyzed. The most frequent were chromosomes 3D and 6D, followed by 1D. Of the 14 possible substitutions, 12 were present in the homozygous condition, 1 (4D/4B) was still segregating, and 6D/6B was absent. With the exception of one 1D/1R substitution and one 7RS/4DS translocation, all lines had a complete rye genome. Key words: triticale, chromosome substitutions, D genome.

scholarly journals GENOTYPIC AND CYTOLOGICAL INFLUENCES ON THE MEIOSIS OF HEXAPLOID TRITICALE

1972 ◽  
Vol 14 (4) ◽  
pp. 889-898 ◽  
Author(s):  
J. B. Thomas ◽  
P. J. Kaltsikes
Keyword(s):  
Genetic Variability ◽  
Bread Wheat ◽  
Secale Cereale ◽  
Triticum Turgidum ◽  
Chromosome Behaviour ◽  
Hexaploid Triticale ◽  
Low Level ◽  
Paired Chromosome ◽  
Secale Cereale L ◽  
Prior Adaptation

Two groups of hexaploid triticale were synthesized from the crosses of two cultivars of diploid rye (Secale cereale L.) with (a): two cultivars of tetraploid macaroni wheat (durum-group of Triticum turgidum L.), and (b): extracted AABB tetraploids of three cultivars of hexaploid bread wheat (T. aestivum L. em. Thell.).The extracted triticales, as a group, showed the greater chromosome regularity in the division of their PMC's. This was attributed to the prior adaptation of the extracted AABB component to the hexaploid meiosis of bread wheat. There was much variation in chromosome behaviour among triticales which had in common the same parental cultivars of wheat and rye. This genetic variability most likely came from the heterogeneity of gametes that were contributed by the two outbred cultivars of rye.AI was delayed in PMC's in which there was a low level of synapsis at MI. This effect was related to the total number of chromosome arms that were paired in each cell (arm pairs), regardless of how many univalents each cell contained. Non-randomness in the distribution of paired chromosome arms suggested that some chromosomes (possibly derived from rye) were less likely to pair than others.The rate at which univalents were formed in cells with a particular number of arm pairs was clearly influenced both by the genotype and by the environment of the triticale in question.

Sign in / Sign up

Export Citation Format

Share Document