AN ANALYTICAL STUDY OF CHROMOSOME BEHAVIOR IN A WHEAT HAPLOID

1955 ◽  
Vol 33 (1) ◽  
pp. 11-30 ◽  
Author(s):  
Clayton Person
Keyword(s):  
Triticum Aestivum ◽  
Inverse Relationship ◽  
Analytical Study ◽  
Triticum Aestivum L ◽  
Chromosome Movement ◽  
Chromosome Behavior ◽  
Polar Groups ◽  
End To End ◽  
Made In

Bivalents, univalents, end-to-end and side-by-side associations, also chromosome distributions to the poles were associatively recorded for each of approximately 2000 meta-anaphase cells of a haploid Triticum aestivum L. It was demonstrated that the distribution of the univalents to the polar groups was not random. An inverse relationship between side-by-side association and bivalent frequencies was also demonstrated, and this formed the first in a series of analytical steps which led to a description of chromosome movement in the haploid. The validity of certain assumptions concerning chromosome behavior was tested using the χ2 method; for others, confirmatory observations were made in monosomic cells.

Transmission of an alien telocentric addition chromosome in common wheat that confers blue seed color

Genome ◽  
1989 ◽  
Vol 32 (1) ◽  
pp. 30-34 ◽  
Author(s):  
E. D. P. Whelan
Keyword(s):  
Triticum Aestivum ◽  
Common Wheat ◽  
Triticum Aestivum L ◽  
Seed Color ◽  
Chromosome Behavior ◽  
Phenotypic Markers ◽  
Telocentric Chromosome ◽  
Cytogenetic Studies ◽  
Meiotic Analyses ◽  
Color Gene

Phenotypic markers of chromosomes are useful for determining chromosome behavior in cytogenetic studies. Transmission of an alien, telocentric addition from Agropyron tricophorum (Link) Richt. that confers purple aleurone pigment and blue seed color was evaluated in common wheat (Triticum aestivum L.). Twenty-five of 2570 seeds from bagged heads of eight ditelocentric-addition sister plants were almost white rather than blue. Seven of these 25 seeds and 4 of 336 blue seeds segregated 41.4%:58.6% blue:white. Meiotic analyses showed that all plants grown from these 11 seeds were spontaneously produced monotelocentric additions. Transmission of the alien telocentric chromosome through the egg and the pollen was estimated to be 19.5 and 14.3%, respectively, based on BC1F1 seed color. About 28% of F2 and F3 seeds were blue; of these 7.4% were ditelocentric additions. The frequency of blue seed in F2 progeny from spontaneous monotelocentric additions (41.4%) was significantly greater than that of monotelocentric additions from controlled crosses (28%). Penetrance of the blue seed color gene(s) associated with the alien telocentric chromosome was good. Misclassification of seed color for 1595 BC1F1 seeds was less than 3% based on BC1F2 progeny.Key words: Agropyron tricophorum.

THE ANALYSIS OF MEIOSIS IN HYBRIDS. I. ANEUPLOID HYBRIDS

1981 ◽  
Vol 23 (2) ◽  
pp. 209-219 ◽  
Author(s):  
G. Kimber ◽  
L. C. Alonso ◽  
P. J. Sallee
Keyword(s):  
Triticum Aestivum ◽  
Mathematical Models ◽  
Chromosome Pairing ◽  
Meiotic Chromosome ◽  
Triticum Aestivum L ◽  
Equal Frequency ◽  
Chromosome Behavior ◽  
Telocentric Chromosomes ◽  
Genomic Relationships ◽  
Meiotic Analyses

The use of telocentric chromosomes in the analysis of the genomic relationships of wheat Triticum aestivum L. em Thell. and its relatives is described and 20 examples are given. The connection between this method of analysis and other mathematical theories of chromosome pairing in hybrids is established. A demonstration of the validity of the assumption that all chromosome arms pair at an equal frequency in calculating expected meiotic analyses is presented. This establishes a practical basis for the development of further mathematical models for predicting meiotic chromosome behavior. Numerical values of the genomic relationships of wheat and its immediate relatives are given.

ИЗОФЕРМЕНТНЫЙ АНАЛИЗ ЭСТЕРАЗ В ЗРЕЛЫХ СЕМЕНАХ ГЕКСАПЛОИДНОЙ МЯГКОЙ ПШЕНИЦЫ (Triticum aestivum L.)

2016 ◽  
Vol 51 (3) ◽  
pp. 327-334
Author(s):  
А.С. РУДАКОВА ◽  
◽  
С.В. РУДАКОВ ◽  
Н.В. ДАВЫДОВА ◽  
Г.В. МИРСКАЯ ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Triticum Aestivum L

MORPHOPHYSIOLOGICAL FEATURES OF WHEAT (Triticum aestivum L.) SEEDLINGS UPON EXPOSURE TO NICKEL NANOPARTICLES

2018 ◽  
Vol 53 (3) ◽  
pp. 578-586 ◽  
Author(s):  
P.N. Tsygvintsev ◽  
◽  
L.I. Goncharova ◽  
K.V. Manin ◽  
V.M. Rachkova ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Nickel Nanoparticles ◽  
Triticum Aestivum L
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