RFLP mapping of the Ha 2 cereal cyst nematode resistance gene in barley

Kretschmer, J. M.; Chalmers, K. J.; Manning, S.; Karakousis, A.; Barr, A. R.; Islam, A. K. M. R.; Logue, S. J.; Choe, Yongjoon; Barker, Susan J.; Lance, Reg; Langridge, Peter

doi:10.1007/s001220050515

Cited by 64 publications

(38 citation statements)

References 11 publications

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“…Festiguay (Brown, 1982 ;Paull et al, 1998) and the Cre3 and Cre4 genes derived from the diploid wheat Aegilops tauschii (Eastwood et al, 1991). In barley, resistance to the Australian pathotype (Andersen & Andersen, 1982) of CCN is derived from the Ha2 gene present in the barley cultivars Chebec and Sahara (Kretschmer et al, 1997) and the Ha4 gene present in barley cv. Galleon (Barr et al, 1998).…”

Section: mentioning

confidence: 99%

Root responses to cereal cyst nematode (Heterodera avenae) in hosts with different resistance genes

et al. 2000

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The development of cereal cyst nematode (CCN ; Heterodera avenae) induced syncytia in the host roots of infected resistant bread wheat (Triticum aestivum cv. AUS10894), diploid wheat (Aegilops tauschii), barley (Hordeum vulgare cv. Chebec and cv. Galleon) and in the susceptible wheat cv. Meering and barley cv. Clipper were studied over a period of 13 d. The resistance to CCN in these cereal plants is conferred by the resistance genes Cre1 in the wheat cv. AUS10894, Cre3 in A. tauschii, Ha2 in barley cv. Chebec and Ha4 in barley cv. Galleon. Anatomical observations were made on the development of the syncytia in CCN-infected wheat and barley roots, which carry each of these four sources of resistance genes. Accelerated development of the syncytia in resistant plants, especially in the barley cultivars, was observed. The sites of syncytia development in susceptible wheat and barley were also closely associated with the vascular tissues in the stele, but less so in the resistant plants. The syncytia in the infected susceptible wheat and barley were also metabolically active at day 13. By contrast, the syncytia of resistant wheat plants carrying the Cre1 or Cre3 genes remained extensively vacuolated and less metabolically active. In barley plants with the Ha2 or Ha4 genes, the syncytia appeared non-functional and in early stages of degeneration by day 13 after inoculation.

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Section: mentioning

confidence: 99%

Root responses to cereal cyst nematode (Heterodera avenae) in hosts with different resistance genes

et al. 2000

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“…The most important traits identified in the Chebec × Harrington population are resistance to cereal cyst nematode (Kretschmer et al 1997) and the QTL controlling malt extract and diastatic power, although other traits are also significant (Table 5).…”

Section: Methodsmentioning

confidence: 99%

Mapping and QTL analysis of the barley population Chebec × Harrington

Barr¹,

Karakousis²,

Lance³

et al. 2003

Aust. J. Agric. Res.

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Abstract.A doubled haploid population of 120 individuals was produced from the parents Chebec, an Australian 2-row barley of feed quality with resistance to the cereal cyst nematode, and Harrington, a 2-rowed, Canadian variety of premium malting quality. This paper describes 18 field and laboratory experiments conducted with the population and summarises the traits mapped and analysed. The genomic location of 25 traits and genes is described and marker-trait associations for 5 traits (malt extract, diastatic power, resistance to cereal cyst nematode, early flowering, resistance to pre-harvest sprouting) important to Australian efforts to improve malting barley varieties have been used in practical breeding programs. Detailed maps for these populations are shown in this paper, while a consensus map incorporating these maps and further experiments on the populations are described elsewhere in this issue.

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“…Numerous studies have been conducted in barley to identify genetic markers for novel traits (Thomas et al 1995;Kretschmer et al 1997;Zhu et al 1998;Marquez-Cedillo et al 2000). The ultimate aim of these studies is to simultaneously improve the yield potential, quality characteristics, and disease traits of barley.…”

Section: Introductionmentioning

confidence: 99%

Mapping and QTL analysis of the barley population Tallon × Kaputar

Çakır¹,

Poulsen²,

Galwey³

et al. 2003

Aust. J. Agric. Res.

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Abstract. A genetic map of barley with 224 AFLP and 39 simple sequence repeat (SSR) markers was constructed using a doubled haploid (DH) mapping population from a cross between the varieties Tallon and Kaputar. Linkage groups were assigned to individual barley chromosomes using the published map locations of the SSR markers as reference points. This genetic map was used to identify markers with linkage to agronomic, disease, and quality traits in barley. The population, which comprised 65 lines, was tested in a range of environments across Australia. Quantitative trait loci (QTLs) analyses were performed using software packages MapMaker, MapManager, and Qgene. Significant associations with markers were found for several traits. Grain yield showed significant association with regions on chromosomes 2H, 3H, and 5H over a range of sites throughout Australia. Regions on chromosomes 2H and 3H explained 30% and 26% of variation in lodging, respectively. Among quality traits, diastatic power was associated with regions on chromosomes 1H, 2H, and 5H (R 2 = 37%). Hot water extract was associated with a region on chromosome 6H and a marker not assigned to a chromosome (R 2 = 45%). There were also environment-specific QTLs for the traits analysed. The markers identified here present an opportunity for marker assisted selection of lines for these traits in barley breeding programs.

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RFLP mapping of the Ha 2 cereal cyst nematode resistance gene in barley

Cited by 64 publications

References 11 publications

Root responses to cereal cyst nematode (Heterodera avenae) in hosts with different resistance genes

Root responses to cereal cyst nematode (Heterodera avenae) in hosts with different resistance genes

Mapping and QTL analysis of the barley population Chebec × Harrington

Mapping and QTL analysis of the barley population Tallon × Kaputar

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