Jointed Goatgrass (Aegilops cylindrica Host) × Wheat (Triticum aestivum L.) Hybrids

Crop Science ◽  
2002 ◽  
Vol 42 (6) ◽  
pp. 1863-1872 ◽  
Author(s):  
L. A. Morrison ◽  
O. Riera-Lizarazu ◽  
L. Crémieux ◽  
C. A. Mallory-Smith
Keyword(s):  
Triticum Aestivum ◽  
Triticum Aestivum L ◽  
Aegilops Cylindrica ◽  
Jointed Goatgrass

Visualization of A- and B-genome chromosomes in wheat (Triticum aestivum L.) × jointed goatgrass (Aegilops cylindrica Host) backcross progenies

Genome ◽  
2000 ◽  
Vol 43 (6) ◽  
pp. 1038-1044 ◽  
Author(s):  
Z N Wang ◽  
A Hang ◽  
J Hansen ◽  
C Burton ◽  
C A Mallory-Smith ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Herbicide Resistance ◽  
Triticum Aestivum L ◽  
Aegilops Cylindrica ◽  
B Genome ◽  
Jointed Goatgrass ◽  
Meiotic Configuration ◽  
Herbicide Resistance Gene ◽  
Mother Cells ◽  
Chromosome Segments

Wheat (Triticum aestivum) and jointed goatgrass (Aegilops cylindrica) can cross with each other, and their self-fertile backcross progenies frequently have extra chromosomes and chromosome segments, presumably retained from wheat, raising the possibility that a herbicide resistance gene might transfer from wheat to jointed goatgrass. Genomic in situ hybridization (GISH) was used to clarify the origin of these extra chromosomes. By using T. durum DNA (AABB genome) as a probe and jointed goatgrass DNA (CCDD genome) as blocking DNA, one, two, and three A- or B-genome chromosomes were identified in three BC2S2 individuals where 2n = 29, 30, and 31 chromosomes, respectively. A translocation between wheat and jointed goatgrass chromosomes was also detected in an individual with 30 chromosomes. In pollen mother cells with meiotic configuration of 14 II + 2 I, the two univalents were identified as being retained from the A or B genome of wheat. By using Ae. markgrafii DNA (CC genome) as a probe and wheat DNA (AABBDD genome) as blocking DNA, 14 C-genome chromosomes were visualized in all BC2S2 individuals. The GISH procedure provides a powerful tool to detect the A or B-genome chromatin in a jointed goatgrass background, making it possible to assess the risk of transfer of herbicide resistance genes located on the A or B genome of wheat to jointed goatgrass.Key words: Triticum aestivum L., Aegilops cylindrica Host, GISH, biological risk.

Visualization of A- and B-genome chromosomes in wheat (Triticum aestivum L.) × jointed goatgrass (Aegilops cylindrica Host) backcross progenies

Genome ◽  
2000 ◽  
Vol 43 (6) ◽  
pp. 1038-1044 ◽  
Author(s):  
Z.N. Wang ◽  
A. Hang ◽  
J. Hansen ◽  
C. Burton ◽  
C.A. Mallory-Smith ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Aegilops Cylindrica ◽  
B Genome ◽  
Jointed Goatgrass

scholarly journals Distribution and characterization of Aegilops cylindrica host from Iran

2019 ◽  
Vol 26 (2) ◽  
pp. 183-195
Author(s):  
Behnam Bakhshi ◽  
Mohammad Jaffar Aghaei ◽  
Eissa Zarifi ◽  
Mohammad Reza Bihamta ◽  
Ehsan Mohseni Fard ◽  
...  
Keyword(s):  
Bread Wheat ◽  
Triticum Aestivum L ◽  
Chromosome Length ◽  
Distribution Centers ◽  
Aegilops Cylindrica ◽  
North West ◽  
Jointed Goatgrass ◽  
Fertile Crescent ◽  
Karyotypic Variation

Jointed goatgrass (Aegilops cylindrica Host; 2n = 4x = 28, CcCcDcDc) is a tetraploid remote relative of bread wheat (Triticum aestivum L; 2n=6x=42, AABBDD) with two genomes and 28 chromosomes. The diversity center of this species is in the Fertile Crescent and in central Asia and could also be found in many places in Iran. In this experiment, 359 accessions provided by National Plant Gene Bank of Iran (NPGBI) were used. Based on the geographical distribution, the highest distribution of A. cylindrica is found in North, West and North-West regions of Iran. The data on the distribution of A. cylindrica showed that its distribution centers in Iran are more than those reported in the previous studies. Chromosome counting showed that all A. cylindrica accessions are tetraploid (2n=4x=28). Results of factor analysis for nine morphological chromosome traits showed that karyotypic variation within accessions are related to the length of chromosomes and there is difference between the accessions for their total chromosome length, but the karyotype of different accessions are almost the same for the symmetry. Low coefficient of variation in morphological traits as well as symmetric karyotypes of A. cylindrica species observed in this study could lead us to predict that A. cylindrica could be a recently evolved species among the remote relatives of bread wheat.

Sampling Wheat (Triticum aestivum) at the Elevator for Jointed Goatgrass (Aegilops cylindrica)

1994 ◽  
Vol 8 (1) ◽  
pp. 64-68 ◽  
Author(s):  
Drew J. Lyon ◽  
John A. Smith ◽  
David D. Jones
Keyword(s):  
Triticum Aestivum ◽  
Winter Wheat ◽  
Geographic Distribution ◽  
Field Survey ◽  
Mail Survey ◽  
Wheat Grain ◽  
Aegilops Cylindrica ◽  
Jointed Goatgrass

Winter wheat grain contaminated with jointed goatgrass joints is often discounted as much as 20% by grain buyers. A mail survey to Nebraska farmers in 1984 identified jointed goatgrass as one of the ten worst weed problems in winter wheat, but a field survey to the same area in 1986 found it in less than 1% of surveyed fields. The objective of this survey was to map the geographic distribution and severity of jointed goatgrass contaminating winter wheat grain in western Nebraska. Jointed goatgrass was found in 25, 29, and 20% of all wheat samples collected in 1990, 1991, and 1992, respectively. Nebraska counties bordering Colorado were found to have the highest percentage of wheat samples contaminated with jointed goatgrass joints, ranging from 23% in Cheyenne county in 1992 to 61% in Keith county in 1991.

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