You are here

molecular marker

Catalogue: GRDC Final Reports
The project has focused on monitoring blackleg populations for virulence by exploiting markers for avirulence (Avr) genes in the fungus, which are complementary to resistance (Rlm) genes in the plant... Selection pressure acting on one avirulence gene can also influence other avirulence genes that are closely linked... Only two genes (LmCys2 and AvrLm6) have mutations in attacking isolates and are considered candidate genes...
Related categories:
Catalogue: GRDC Final Reports
UA00078 was developed to provide routine marker-assisted selection for barley breeding by the Victorian Department of Primary Industries (VicDPI) and the University of Adelaide (UA)... The primary focus is the application of marker-based selection to early generation material to increase the frequency of desirable traits in the germplasm that enters field evaluation... The strategy has allowed a significant increase in throughput, typically equating to an extra 4,700 individual plants analysed each year...
Related categories:
Catalogue: GRDC Final Reports
The project has provided technological support to improve sprouting resistance in wheat by Australian wheat breeders by annual phenotyping of advanced breeding lines, development of improved screening technologies including molecular markers, and germplasm with improved sprouting resistance based on grain dormancy... Given that grain dormancy is a difficult trait to manipulate due to interactions with both maturity and the environment, molecular markers tightly linked to the major QTLs are a high priority... Results from dormant x non-dormant crosses and reciprocal crosses indicate that 2-3 QTLs or genes are involved in dormancy in white-grained as well as red-grained wheat genotypes whilst the patterns of phenotype expression are consistent with a model involving an interaction between an embryo factor (sensitivity to abscisic acid (ABA) that declines during after-ripening, most probably the 4A QTL) and at least one other factor that is expressed in the seed coat...
Related categories:
Catalogue: GRDC Media
WA typically produces 40 per cent of the national wheat crop and of this approximately 95 per cent is sold overseas, mostly to the Asian and Middle Eastern markets, so it's important to determine and meet market needs... Average annual growth in wheat productivity in Australia has been about one per cent for the 20th century, until the 1980s, with the agronomic breakthrough associated with minimum tillage, when it became closer to four per cent, of which a quarter is attributed to better cultivars developed by wheat breeders... Senior InterGrain Wheat Breeder, Robin Wilson, says that the blend of traditional breeding with molecular marker techniques provides advantage in that breeders can better target genetic combinations they need to deliver simultaneously on yield, disease resistance, stress tolerance and quality...
Related categories:
Catalogue: GRDC Final Reports
The aim of the project was to enhance capability in marker validation and implementation in the Western Australian (WA) barley breeding program, leading to more rapid development of improved varieties... Markers were used to: accelerate backcrossing; inter-cross various target traits; improve genetic value of doubled haploid (DH) lines by screening donor plants; and improve genetic gain by post-screening DH lines... Molecular markers were used to: (1) accelerate back-crossing target traits into elite genetic backgrounds; (2) inter-cross various target traits; (3) improve genetic value of DH lines by pre-screening donor plants for DH production; and (4) improve genetic gain by post-screening DH lines before field testing...
Related categories:
Catalogue: GRDC Final Reports
More than 70,000 marker assays associated with 22 important traits/genes were used to integrate doubled haploid (DH), single seed descent (SSD), male sterile facilitated recurrent selection (MSFRS) and conventional breeding techniques to improve genetic gain and reduce the breeding cycle time... Nine breeding lines derived using MAS were evaluated in the Stage 4 crop variety trials (CVT)... MAS is becoming a valuable breeding technique and can be routinely used in the breeding program...
Related categories:
Catalogue: GRDC Final Reports
There has been significant improvement in the effectiveness and selection efficiency of the breeding program... A DH population derived from Batavia x Pelsart was used for validation of QTL associated with black point resistance... Two DH populations derived from SUN325 and QT parents were used to validate markers for resistance to PHS, from the AUS1408 source...
Related categories:
Catalogue: GRDC Final Reports
Markers have been implemented for rust resistance (VPM resistance gene complex, Yr17, Lr37 and Sr38 ), resistance to black point, and resistance to barley yellow dwarf virus (BYDV), in a total of about 2,700 tests... Marker implementation will increase dramatically over the next few years as markers for traits of high priority to EGA are validated... In 2003/04 nearly 300 lines were also assessed for resistance to BYDV using markers...
Related categories:
Catalogue: GRDC Final Reports
A reliable marker for CCN tolerance (crop yield in the presence of CCN) works across the entire germplasm in the National Oat Breeding Program... 441 DArT markers could be added to the previous map comprising 447 AFLP/RFLP/SSR markers... Marker '182oPc' is a breeder marker that can directly be used for marker-assisted selection (MAS) of CCN tolerance in the National Oat Breeding Program...
Related categories:
Catalogue: GRDC Final Reports
Barley Breeding Australia (BBA)-West operated collaboratively as a part of a national barley breeding strategy to address industry needs in Western Australian (WA) and south eastern (SE) Australian regions with neutral to acid soils... The resulting malting varieties (Baudin and Hamelin ) represented significant improvements in malting quality and there has been strong demand for these varieties in the international marketplace... The germplasm and knowledge developed in this project has provided, and will continue to provide, strong support to the ongoing development of commercially successful, targeted-to-market, elite malting and feed barley varieties by commercial barley breeding entities...
Related categories:

Pages