Enhancement of the salt tolerance of Triticum turgidum L. by the Kna1 locus transferred from the Triticum aestivum L. chromosome 4D by homoeologous recombination

1994 ◽  
Vol 87 (7) ◽  
pp. 872-877 ◽  
Author(s):  
J. Dvořak ◽  
M. M. Noaman ◽  
S. Goyal ◽  
J. Gorham
Keyword(s):  
Triticum Aestivum ◽  
Salt Tolerance ◽  
Triticum Turgidum ◽  
Triticum Aestivum L ◽  
Homoeologous Recombination

The biology and ecology of hexaploid wheat (Triticum aestivum L.) and its implications for trait confinement

2008 ◽  
Vol 88 (5) ◽  
pp. 997-1013 ◽  
Author(s):  
C. J. Willenborg ◽  
R. C. Van Acker
Keyword(s):  
Triticum Aestivum ◽  
Gene Flow ◽  
Hexaploid Wheat ◽  
Triticum Turgidum ◽  
Cropping Systems ◽  
Pollen Viability ◽  
Triticum Aestivum L ◽  
Genetically Engineered ◽  
Wide Range ◽  
Trait Confinement

This review summarizes the biological and ecological factors of hexaploid wheat (Triticum aestivum L.) that contribute to trait movement including the ability to volunteer, germination and establishment characteristics, breeding system, pollen movement, and hybridization potential. Although wheat has a short-lived seedbank with a wide range of temperature and moisture requirements for germination and no evidence of secondary dormancy, volunteer wheat populations are increasing in relative abundance and some level of seed persistence in the soil has been observed. Hexaploid wheat is predominantly self-pollinating with cleistogamous flowers and pollen viability under optimal conditions of only 0.5 h, yet observations indicate that pollen-mediated gene flow can and will occur at distances up to 3 km and is highly dependent on prevailing wind patterns. Hybridization with wild relatives such as A. cylindrica Host., Secale cereale L., and Triticum turgidum L. is a serious concern in regions where these species grow in field margins and unmanaged lands, regardless of which genome the transgene is located on. More research is needed to determine the long-term population dynamics of volunteer wheat populations before conclusions can be drawn with regard to their role in trait movement. Seed movement has the potential to create adventitious presence (AP) on a larger scale than pollen, and studies tracing the movement of wheat seed in the grain handling system are needed. Finally, the development of mechanistic models that predict landscape-level trait movement are required to identify transgene escape routes and critical points for gene containment in various cropping systems. Key words: Triticum, coexistence, gene flow, genetically-engineered, herbicide-resistant, trait confinement

Water use of some recent bread and durum wheat cultivars in western Canada

2007 ◽  
Vol 87 (2) ◽  
pp. 289-292 ◽  
Author(s):  
H. Wang ◽  
T. N. McCaig ◽  
R. M. DePauw ◽  
J. M. Clarke ◽  
R. Lemke
Keyword(s):  
Triticum Aestivum ◽  
Drought Tolerance ◽  
Soil Water ◽  
Water Use ◽  
Triticum Turgidum ◽  
Grain Filling ◽  
Triticum Aestivum L ◽  
Western Canada ◽  
Wheat Cultivars ◽  
Use Efficiency

Recently developed cultivars of Canada Western Red Spring (CWRS) wheat (Triticum aestivum L.) and Canada Western Amber Durum (CWAD) (Triticum turgidum L. var durum) produced significantly more grain than older cultivars. This production was attributed to higher harvest indices and better water use efficiency. Durum cultivars and CWRS AC Intrepid and AC Barrie extracted relatively more soil water below 55 cm, which may be advantageous in minimizing leaching and related to drought tolerance during grain-filling. Key words: Hexaploid wheat, durum, water use, soil water

Molecular cytogenetic characterization of an alloplasmic durum wheat line with a portion of chromosome 1D of Triticum aestivum carrying the scsae gene

Genome ◽  
2004 ◽  
Vol 47 (1) ◽  
pp. 206-214 ◽  
Author(s):  
Khwaja G Hossain ◽  
Oscar Riera-Lizarazu ◽  
Venugopal Kalavacharla ◽  
M Isabel Vales ◽  
Jamie L Rust ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
In Situ Hybridization ◽  
Durum Wheat ◽  
Triticum Turgidum ◽  
Aegilops Tauschii ◽  
Distal Region ◽  
Specific Gene ◽  
Homoeologous Recombination ◽  
Male Sterile

Triticum aestivum (2n = 6x = 42, AABBDD) with Triticum longissimum (2n = 2x = 14; S1S1) cytoplasm ((lo) cytoplasm) has normal fertility and plant vigor. However, the nucleus of durum wheat (Triticum turgidum (2n = 4x = 28, AABB)) is incompatible with the T. longissimum cytoplasm, producing non-viable progeny. This incompatibility is alleviated by scsae, a species cytoplasm-specific (scs) gene, on the long arm of chromosome 1D (1DL) of common wheat. The hemizygous (lo) durum scsae line is male sterile and is maintained by crossing to normal durum wheat. After pollination, the seeds produced are either plump and viable (with scsae) or shriveled and inviable (without scsae). Thus, the chromosome with scsae is inherited as a whole without recombination. The objectives of this study were to characterize the chromosome carrying scsae and to determine the process through which this gene was introgressed into the (lo) durum background. Molecular marker analysis with 27 probes and primers mapped to homoeologous group 1 and genomic in situ hybridization using differentially labeled total genomic DNA of durum wheat and Aegilops tauschii suggest the presence of a 1AL segment in place of the distal region of 1DL. Owing to the absence of any detectable duplications or deletions, homoeologous recombination is the most likely mechanism by which this introgression occurred.Key words: homoeologous recombination, in situ hybridization, nuclear-cytoplasmic interaction, species cytoplasm specific gene

QTL mapping for salt tolerance associated traits in wheat (Triticum aestivum L.)

Euphytica ◽  
2019 ◽  
Vol 215 (12) ◽  
Author(s):  
Rajni Devi ◽  
Sewa Ram ◽  
Veenti Rana ◽  
Vipin Kumar Malik ◽  
Veena Pande ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Salt Tolerance ◽  
Qtl Mapping ◽  
Triticum Aestivum L
Sign in / Sign up

Export Citation Format

Share Document