The influence of particular chromosome regions of Triticum timopheevii on the formation of resistance to diseases and quantitative traits in common wheat

Dosage effects generated by either loss or gain of a chromosome segment were used to identify chromosome regions associated with morphological and quantitative characters in maize (Zea mays L.). Using B–A translocation stocks introgressed into a B73Ht background, a chromosome arm dosage series in a Mo17Ht × B73Ht F1 hybrid background was created for 18 of the 20 chromosome arms. The dosage series was then evaluated for 12 quantitatively inherited characters to associate specific phenotypic changes in a trait with a specific chromosome arm. Not only did our results show the familiar aneuploid syndrome phenomenon, but differential dosage effects among particular chromosome arms were demonstrated. All the quantitative traits measured and all the chromosome arms examined in this study were responsive to changes in chromosome arm dosage. The possible bases behind those differences and their utility in identifying quantitative trait loci, as well as the genetic relationships among the group of quantitatively inherited characters studied, are considered. Key words : corn, chromosome arm, B–A translocations, dosage analysis.

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Tetraploid wheat species Triticum timopheevii and Triticum militinae in common wheat improvement

Acta Agronomica Hungarica ◽

10.1556/aagr.50.2002.4.9 ◽

2002 ◽

Vol 50 (4) ◽

pp. 463-477 ◽

Cited By ~ 7

Author(s):

K Järve ◽

I. Jakobson ◽

T. Enno

Keyword(s):

Disease Resistance ◽

Common Wheat ◽

Tetraploid Wheat ◽

Introgressive Hybridization ◽

Fungal Diseases ◽

Triticum Timopheevii ◽

Wheat Species ◽

Major Genes ◽

Wheat Improvement ◽

Unknown Species

Timopheevii wheats are discussed as donors for improving the disease resistance of common wheat. Attention is paid to the comparison of the morphological and chromosomal characteristics of Triticum timopheevii and T. militinae, their crossability with T. aestivum and their response to fungal diseases. The possible origin of T. militinae from an introgressive hybridization between T. timopheevii and an unknown species is discussed. Major genes for resistance to various fungal diseases, transferred to common wheat from T. timopheevii, are listed.

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MlAG12: a Triticum timopheevii-derived powdery mildew resistance gene in common wheat on chromosome 7AL

Theoretical and Applied Genetics ◽

10.1007/s00122-009-1150-y ◽

2009 ◽

Vol 119 (8) ◽

pp. 1489-1495 ◽

Cited By ~ 20

Author(s):

Judd J. Maxwell ◽

Jeanette H. Lyerly ◽

Christina Cowger ◽

David Marshall ◽

Gina Brown-Guedira ◽

...

Keyword(s):

Powdery Mildew ◽

Resistance Gene ◽

Common Wheat ◽

Powdery Mildew Resistance ◽

Triticum Timopheevii ◽

Powdery Mildew Resistance Gene ◽

Mildew Resistance

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Analysis of the Distribution of Triticum timopheevii Zhuk. Genetic Material in Common Wheat Varieties (Triticum aestivum L.)

Russian Journal of Genetics ◽

10.1134/s1022795418020126 ◽

2018 ◽

Vol 54 (2) ◽

pp. 166-175

Author(s):

S. P. Martynov ◽

T. V. Dobrotvorskaya ◽

V. A. Krupnov

Keyword(s):

Triticum Aestivum ◽

Common Wheat ◽

Genetic Material ◽

Triticum Aestivum L ◽

Triticum Timopheevii ◽

Wheat Varieties

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Chromosomal location of a Triticum timopheevii - derived powdery mildew resistance gene transferred to common wheat

Genome ◽

10.1139/g99-141 ◽

2000 ◽

Vol 43 (2) ◽

pp. 377-381 ◽

Cited By ~ 57

Author(s):

K Järve ◽

H O Peusha ◽

J Tsymbalova ◽

S Tamm ◽

K M Devos ◽

...

Keyword(s):

Powdery Mildew ◽

Resistance Gene ◽

Common Wheat ◽

Powdery Mildew Resistance ◽

Molecular Data ◽

Monosomic Analysis ◽

The Novel ◽

Triticum Timopheevii ◽

Powdery Mildew Resistance Gene ◽

Mildew Resistance

A dominant powdery mildew resistance gene introduced from Triticum timopheevii in line 146-155-T of common wheat, Triticum aestivum, was located on chromosome 6B by monosomic analysis. Restriction fragment length polymorphism (RFLP) and microsatellite analyses detected the presence of a T. timopheevii segment, translocated to chromosome 6B, with breakpoints between the loci Xpsr8/Xpsr964 on 6BS and Xpsr154/Xpsr546 on 6BL. The novel powdery mildew resistance gene, which has been designated Pm27, was shown to cosegregate with the microsatellite locus Xpsp3131, which is located on the introgressed T. timopheevii segment. The molecular data confirm the location of Pm27 on the translocated 6B chromosome. Key words: monosomic analysis, RFLP, microsatellites, Pm27.

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