5-azacytidine induces chromosomal breakage in the root tips of wheat carrying the cuckoo chromosome 4S(super.L) from Aegilops sharonensis

Article Abstract:

The DNA hypomethylating agent 5-azacytidine has been found to induce chromosomal breakage in the root tips of wheat with the cuckoo/gametocidal chromosome 4S(super.L) from Aegilops sharonensis. In plants lacking the chromosome this is not the case. The cuckoo chromosome is preferentially transmitted when into Triticum aestivum, common wheat, when introduced by hybridization. It appears that chromosome fragmentation, induced by the Gc factors during early seed development, is repressed at later stages by DNA methylation.

Roots (Botany), DNA damage, Heredity, Methylation, Hybridization

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The production and characterization of recombination between chromosome 3N of Aegilops uniaristata and chromosome 3A of wheat

Article Abstract:

Recombination between chromosome 3A of wheat and chromosome 3N of Aegilops uniaristata has been studied. Six wheat lines were produced and characterized from the perspective of exchange points of RFLP analysis. Chromosome 3N has in it an undesirable brittle rachis gene which was not seen in three of the recombinant lines. Results support existing evidence of a pericentric inversion in chromosome 3N related to wheat homoeologous group 3 chromosomes.

Usage, Food, Agricultural biotechnology, Plant genetics, Genetically modified plants, Genetic recombination, Biotechnology, Plant genetic engineering

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The influence of the group 1 chromosomes of wheat on ear-emergence times and their involvement with vernalization and day length

Article Abstract:

Influence of the group 1 chromosomes of wheat on ear-emergence times and their involvement with vernalization and day length are discussed based on a study using aneuploid wheat lines in Chinese Spring in which each homeologous group 1 chromosome delayed ear emergence. The genes interacted with each other, with vernalization, and with day length.

Environmental aspects, Chromosomes, Angiosperms, Daylight, Crops and climate, Agricultural climatology

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