Cytogenetics of Triticum macha.

1. A semi-lethal gene combination has been found in hexaploid species hybrids involving some strains of Triticum macha, but not in comparable hybrids involving other strains of T. macha. The production of these semi-lethal hybrids can be explained by the interaction of two genes designated as ma and mb.2. The gene ma is carried in some strains of T. macha. The gene mb is carried in the third chromosome set of all other hexaploid species of Triticum, in Aegilops squarrosa and in Aeg. cylindrica.3. The semi-lethal gene combination has been found between species which would otherwise produce fertile hybrids and between species which would otherwise produce sterile hybrids. The semilethal gene combination occurs between species which do not overlap geographically.4. The distribution of the genes ma and mb shows that the gene ma originated in T. macha and that the gene mb originated in Aeg. squarrosa and was introduced from there, during the course of evolution, into the hexaploid species of Triticum (probably excluding T. macha) and into Aeg. cylindrica.5. Meiosis in semi-lethal plants was comparable to meiosis in normal plants. But the semi-lethal plants showed a reduction in fertility, probably as a result of their poor vegetative growth.6. The chromosomes of T. macha and T. vavilovi have been no more structurally differentiated than the chromosomes of the other hexaploid species of Triticum.7. The present study has confirmed that the third chromosome set of the genus Triticum has been phylogenetically derived from Aeg. squarrosa.

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Characterisation of fusarium head blight resistance located on chromosome 4A of Triticum macha

Plant Protection Science ◽

10.17221/10560-pps ◽

2017 ◽

Vol 38 (SI 2 - 6th Conf EFPP 2002) ◽

pp. 580-582 ◽

Cited By ~ 1

Author(s):

A. Steed ◽

E. Chandler ◽

M. Thomsett ◽

J. Carter ◽

S. Faure ◽

...

Keyword(s):

Fusarium Head Blight ◽

Marker Assisted Selection ◽

Single Gene ◽

Fusarium Head Blight Resistance ◽

Type I ◽

Head Blight ◽

Yield Trait ◽

Fhb Resistance ◽

Wheat Lines ◽

Triticum Macha

Chromosome 4A of Triticum macha carries resistance to Fusarium head blight (FHB). Double haploid lines (DH) of T. macha 4A were used to determine the type of resistance and location of the gene(s). FHB resistance and yield trait data collected over two seasons following spray and point inoculation, indicate that the resistance is of type I and is probably conferred by a single gene. The resistance was mapped with microsatellite markers to a small area of the T. macha 4A chromosome flanked by markers gwm 610 and gwm 165. This could greatly facilitate future marker assisted selection work aimed at increasing resistance to FHB in other winter wheat lines.

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Analysis of LMW-GS, α- and γ-Gliadin Gene Coding Sequences from Triticum macha

Agricultural Sciences in China ◽

10.1016/s1671-2927(09)60080-8 ◽

2010 ◽

Vol 9 (2) ◽

pp. 163-169 ◽

Cited By ~ 2

Author(s):

Li-juan XIONG ◽

Ji-rui WANG ◽

You-liang ZHENG

Keyword(s):

Coding Sequences ◽

Gene Coding ◽

Triticum Macha

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Homology of chromosomes of Triticum macha Dek. et Men. and Triticum aestivum L. as shown with the help of genetic markers

Genome ◽

10.1139/g90-114 ◽

1990 ◽

Vol 33 (5) ◽

pp. 755-757 ◽

Cited By ~ 4

Author(s):

E. V. Metakovsky ◽

Z. A. Iakobashvili

Keyword(s):

Triticum Aestivum ◽

Genetic Analysis ◽

Storage Proteins ◽

Seed Storage ◽

Seed Storage Proteins ◽

Triticum Aestivum L ◽

Close Relationship ◽

Homology Relationship ◽

Relationship Of ◽

Triticum Macha

Inheritance of the storage protein (gliadin and glutenin) genes of Triticum macha Dek. et Men. and their allelism to Triticum aestivum L. genes have been studied. A close homology of at least chromosomes 1A and 1B of the two species has been found. Results confirm a very close relationship between T. macha and T. aestivum.Key words: seed storage proteins, genetic analysis, chromosome homology, relationship of Triticum macha Dek. et Men. and Triticum aestivum L.

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