Molecular marker assisted genetic analysis of head shattering in six-rowed barley

Kandemır, N.; Kudrna, David; Ullrich, S. E.; Kleinhofs, A.

doi:10.1007/s001220051470

Cited by 41 publications

(23 citation statements)

References 19 publications

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“…Komatsuda et al (2004) detected two minor QTLs for brittleness on chromosomes 5H and 7H coinciding with the position of the QTLs QBrt.S42-5H.a and QBrt.S42-7H.a. The QTL on chromosome 5H may also be identical to the weak rachis QTL Hst-7L detected by Kandemir et al (2000).…”

Section: Brittlenessmentioning

confidence: 81%

AB-QTL analysis in spring barley: II. Detection of favourable exotic alleles for agronomic traits introgressed from wild barley (H. vulgare ssp. spontaneum)

et al. 2006

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The objective of the present study was to identify favourable exotic Quantitative Trait Locus (QTL) alleles for the improvement of agronomic traits in the BC 2 DH population S42 derived from a cross between the spring barley cultivar Scarlett and the wild barley accession ISR42-8 (Hordeum vulgare ssp. spontaneum). QTLs were detected as a marker main effect and/or a marker · environment interaction effect (M · E) in a three-factorial ANOVA. Using field data of up to eight environments and genotype data of 98 SSR loci, we detected 86 QTLs for nine agronomic traits. At 60 QTLs the marker main effect, at five QTLs the M · E interaction effect, and at 21 QTLs both the effects were significant. The majority of the M · E interaction effects were due to changes in magnitude and are, therefore, still valuable for marker assisted selection across environments. The exotic alleles improved performance in 31 (36.0%) of 86 QTLs detected for agronomic traits. The exotic alleles had favourable effects on all analysed quantitative traits. These favourable exotic alleles were detected, in particular on the short arm of chromosome 2H and the long arm of chromosome 4H. The exotic allele on 4HL, for example, improved yield by 7.1%. Furthermore, the presence of the exotic allele on 2HS increased the yield component traits ears per m 2 and thousand grain weight by 16.4% and 3.2%, respectively. The present study, hence, demonstrated that wild barley does harbour valuable alleles, which can enrich the genetic basis of cultivated barley and improve quantitative agronomic traits.

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Section: Brittlenessmentioning

confidence: 81%

AB-QTL analysis in spring barley: II. Detection of favourable exotic alleles for agronomic traits introgressed from wild barley (H. vulgare ssp. spontaneum)

et al. 2006

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“…The head shattering QTL detected on chromosome 5HL and the brittle rachis QTL that we detected on chromosome 5HL could be identical, but their relative positions remain to be confirmed by the use of common markers. The btr1/btr2 complex is not allelic to the head shattering QTL on chromosome 3H (Kandemir et al 2000).…”

Section: Identification Of Qtls For Nonbrittle Rachismentioning

confidence: 97%

“…The phenomenon is called "rachis break" or "head shattering" and causes loss of yield. Head shattering QTLs were detected on chromosomes 2H, 3H, and 5HL (Kandemir et al 2000). Head shattering can be regarded as a special case of brittle rachis, so it is natural that some of the genes or QTLs controlling the two traits are common.…”

Section: Identification Of Qtls For Nonbrittle Rachismentioning

confidence: 99%

High-density AFLP map of nonbrittle rachis 1 (btr1) and 2 (btr2) genes in barley (Hordeum vulgare L.)

et al. 2004

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Wild relatives of barley disperse their seeds at maturity by means of their brittle rachis. In cultivated barley, brittleness of the rachis was lost during domestication. Nonbrittle rachis of occidental barley lines is controlled by a single gene (btr1) on chromosome 3H. However, nonbrittle rachis of oriental barley lines is controlled by a major gene (btr2) on chromosome 3H and two quantitative trait loci on chromosomes 5HL and 7H. This result suggests multiple mutations of the genes involved in the formation of brittle rachis in oriental lines. The btr1 and btr2 loci did not recombine in the mapping population analyzed. This result agrees with the theory of tight linkage between the two loci. A high-density amplified fragment-length polymorphism (AFLP) map of the btr1/btr2 region was constructed, providing an average density of 0.08 cM/locus. A phylogenetic tree based on the AFLPs showed clear separation of occidental and oriental barley lines. Thus, barley consists of at least two lineages as far as revealed by molecular markers linked to nonbrittle rachis genes.

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“…Komatsuda and Mano (2002) mapped the brittle rachis trait to 3H but to a moredistal location on 3HS, which is in agreement with the position suggested by Franckowiak et al (1997). Kandemir et al (2000) mapped Btr2 of H. spontaneum in the interval MWG798B -MWG014 on 3H. In the AH population, 'brittle rachis' was treated as a qualitative trait and was mapped to 3H at the proximal end of the linkage group.…”

Section: Comparison Of Qtls With Other Studiesmentioning

confidence: 99%

QTLs for agronomic traits in the Mediterranean environment identified in recombinant inbred lines of the cross 'Arta' × H. spontaneum 41-1

et al. 2003

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A genetic linkage map has been developed for recombinant inbred lines (RILs) of the cross 'Arta' x Hordeum spontaneum 41-1. One hundred and ninety four RILs, randomly chosen from a population of 494 RILs, were mapped with 189 markers including one morphological trait ( btr = brittle rachis locus). The linkage map extended to 890 cM. Agronomic traits such as grain yield, biological yield, days to heading, plant height, cold tolerance and others were evaluated at the ICARDA research stations Tel Hadya and Breda during the years 1996-97 and 1997-98. QTLs for agronomic traits related to drought resistance were localized. For the most-important character 'plant height under drought stress', QTLs on 2H, 3H and 7H were detected. The 'plant height' QTLs, specially the one on 3H, showed pleiotropic effects on traits such as days to heading, grain yield and biological yield. QTLs were also identified for other traits associated with adaptation to the Mediterranean environment such as cold tolerance, days to heading and tiller number. The identification of QTLs for agronomic traits is a first step to analyze and to dissect complex characters such as adaptation to drought tolerance.

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Molecular marker assisted genetic analysis of head shattering in six-rowed barley

Cited by 41 publications

References 19 publications

AB-QTL analysis in spring barley: II. Detection of favourable exotic alleles for agronomic traits introgressed from wild barley (H. vulgare ssp. spontaneum)

AB-QTL analysis in spring barley: II. Detection of favourable exotic alleles for agronomic traits introgressed from wild barley (H. vulgare ssp. spontaneum)

High-density AFLP map of nonbrittle rachis 1 (btr1) and 2 (btr2) genes in barley (Hordeum vulgare L.)

QTLs for agronomic traits in the Mediterranean environment identified in recombinant inbred lines of the cross 'Arta' × H. spontaneum 41-1

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