Use of Monotelotrisomics for Linkage Mapping in Barley

Fedak, George; Tsuchiya, T.; Helgason, S. B.

doi:10.1139/g72-117

Cited by 43 publications

(23 citation statements)

References 1 publication

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“…The region yc to br is in the short arm of chromosome 1. The markersfc, cer-a and br have been placed in the short arm by means of telotrisomics (27) with br most distal (7). Definitive information on the location of yc relative to ert-m is not available but the distances obtained by two point tests, which are collected in Table VI …”

Section: Coefficient Of Coincidencementioning

confidence: 99%

The localization of eceriferum loci in barley V. Three point tests of genes on chromosome 1 and 3 in barley

Søgaard

1977

Carlsberg Res. Commun.

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Section: Coefficient Of Coincidencementioning

confidence: 99%

The localization of eceriferum loci in barley V. Three point tests of genes on chromosome 1 and 3 in barley

Søgaard

1977

Carlsberg Res. Commun.

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“…The naked trait is controlled by a single gene that was mapped at the nud locus on chromosome 7H (Fedak et al 1972). The gene was recently cloned, using a positional cloning approach by Taketa et al (2008): they revealed that an ethylene response factor (ERF) gene resides at nud and plays a putative role in controlling the formation of a lipid layer on the pericarp epidermis in covered barley.…”

mentioning

confidence: 99%

Effect of the nud gene on grain yield in barley

Barabaschi¹,

Francia²,

Tondelli³

et al. 2012

CZECH J GENET PLANT

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Naked barleys are less yielding than the hulled ones while the reason for this difference has not been definitely clarified. To investigate the effect of the nud gene on yield, a barley doubled haploid (DH, Proctor × Nudinka) population was initially tested in three environments and a QTL study was run on the entire population as well as on two nud/NUD DH subpopulations. Among the agronomic traits studied, a QTL effect was found at nud locus on chromosome 7H only for yield and thousand grain weight (TGW), while a second QTL was found on 6H, although contributed by the naked parent. Other QTLs for TGW were identified on 2H, 3H and 5H. Most QTLs found in the entire population were confirmed by the study on the two groups. No interaction was observed between QTLs. To provide a more accurate evaluation of the effects of the nud gene upon grain yield, its components and other agronomic traits, sixteen naked advanced backcross (AB) BC5F2 lines in the hulled background of cultivar Arda were prepared and evaluated in a replicated yield trial for two years. The only differences found between AB lines and Arda in grain yield and TGW were due to hull weight (11.97% of kernel weight). No differences were observed in other traits such as grains/m 2 , grains per spike, plant height, heading date and mildew resistance. In conclusion, we think to have clarified that the effect of the nud gene on yield is due to hulls, and we did not find any pleiotropic effect of nud on other traits. This suggests, together with the finding of a QTL contributed by the naked parent, that there is a great potential to improve naked barley up to the yield levels of hulled barley.

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“…As there is no complete set of telotrisomics, not only telotrisomics but also primary trisomits will be used in genetic analysis in future. Primary trisomics are used to locate genes on chromosomes, which is then followed by chromosome arm location (STURM & MELZ, 1982), definition of the centromere position, and estimation of the relative distance of genes from the centromere or other genes (FEDAK et al, 1972) by means of telotrisomics. LINDER et al (in press) distinguished the telotrisomics 1 RS and 1 RL by peroxidase activity.…”

Section: Resultsmentioning

confidence: 99%