Genetic control of dormancy in a Triumph/Morex cross in barley

Prada, D.; Ullrich, S. E.; Molina-Cano, José Luis; Cistué, L.; Clancy, J. A.; Romagosa, I.

doi:10.1007/s00122-004-1608-x

Cited by 60 publications

(54 citation statements)

References 23 publications

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“…For example, dormancy QTLs are distributed over all five chromosomes (chr) in Arabidopsis (Arabidopsis thaliana) ( Van der Schaar et al, 1997;Alonso-Blanco et al, 2003;Clerkx et al, 2004) and 11 of the 12 chr in cultivated (Oryza sativa) (Wan et al, 1997;Lin et al, 1998;Dong et al, 2002;Miura et al, 2002), wild (O. rufipogon) (Cai and Morishima, 2000;Thomson et al, 2003), and weedy (O. sativa) (Gu et al, 2004) rice. Dormancy QTLs in barley (Oberthur et al, 1995;Li et al, 2003;Prada et al, 2004), sorghum (Lijavetzky et al, 2000), and wheat (Anderson et al, 1993;Kato et al, 2001;Mares and Mrva, 2001;Groos et al, 2002;Osa et al, 2003;Kulwal et al, 2004) have been identified to seek gene resources to impart resistance to preharvest sprouting (PHS) and to manipulate germination programs in the malting process. Additional research has been aimed at isolation of individual dormancy alleles from donor parents to determine gene effects, interactions with environmental factors, and breeding potential.…”

Section: Introductionmentioning

confidence: 99%

Isolation of three dormancy QTLs as Mendelian factors in rice

2005

Heredity

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Seed dormancy is a key adaptive trait under polygenic control in many plants. We introduced the chromosomal regions containing the dormancy QTLs qSD1, qSD7-1, and qSD12 from an accession of weedy rice into a nondormant genetic background to examine component genetic effects and their interactions with time of afterripening (DAR). A BC 4 F 2 plant, which was heterozygous for the three loci, was selected to develop the BC 4 F 3 population. Single point analysis detected only qSD7-1 and qSD12 (R 2 ¼ 38-72%) at 10, 30, and 50 DAR in the population. However, multiple linear regression analysis detected genetic effects of the three QTLs and their trigenic epistasis, an environmental effect of DAR (E), and interactions of E with qSD12 and with the qSD1 Â qSD7-1 and qSD7-1 Â qSD12 epistases. The linear model demonstrates that QTL main effects varied with DAR, and that some epistasis or epistasis-by-DAR interactions partially counteract the main effects. The three QTLs were isolated as single Mendelian factors from the BC 4 F 3 population and estimated for component genic effects based on the BC 4 F 4 populations. Isolation improved estimation of the qSD1 effect and confirmed the major effect of qSD12. The qSD1 and qSD12 loci displayed a gene-additive effect. The qSD7-1, which was further narrowed to a chromosomal region encompassing the red pericarp color gene Rc, displayed gene additive and dominant effects. Heredity (2006) 96, 93-99.

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Section: Introductionmentioning

confidence: 99%

Isolation of three dormancy QTLs as Mendelian factors in rice

2005

Heredity

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“…In barley, two major QTLs on chromosome 5H, one near the centromere (SD1) and one in the telomeric region of the long arm (SD2), and multiple minor QTLs on chromosomes 4H (SD3) and 7H (SD4) were identified in the Steptoe/Morex mapping population (Han et al 1996). These QTLs appear to be coincident with QTLs mapped in other studies based on alignment of linkage maps , Prada et al 2004, Edney and Mather 2004, Zhang et al 2005. Hori et al (2007) constructed EST-based linkage maps on seven recombinant inbred (RI) populations and one doubled haploid (DH) population derived from crosses involving eleven cultivated barley accessions and one wild barley accession.…”

Section: Introductionmentioning

confidence: 60%

Genetic analysis of seed dormancy QTL in barley

et al. 2009

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Seed dormancy in wild barley enables drought escape by preventing germination during the hot summer in arid environments. Dormancy in cultivated barley has different effects: it can delay the malting process and/ or it can prevent pre-harvest sprouting. Thus, cloning dormancy genes in barley will contribute to understanding the domestication process and it will facilitate optimizing the trait for efficient agronomic and industrial uses. Rates of seed germination were used to evaluate dormancy on physiologically matured grain samples that were dried and stored frozen until use. With this phenotypic scoring procedure, many genetic factors controlling seed dormancy has been reported as quantitative trait loci (QTL). Of these QTL, one at the centrometic region of chromosome 5H (Qsd1) has been most frequently identified and shows the largest effect across mapping populations. We also identified this QTL using the EST map based on Haruna Nijo (H. vulgare ssp. vulgare) crossed with wild barley H602 (H. vulgare ssp. spontaneum). We have derived both doubled haploid and recombinant chromosome substitution lines (RCSLs) from this cross. At least four QTLs are segregating in this germplasm. RCSLs having only the Qsd1 segment of wild barley in a Haruna Nijo genetic background were identified and 910 BC 3 F 2 plants were scored for dormancy. In these lines, segregation for dormancy fit a mono-factorial ratio. These germplasm resources are appropriate for map based cloning of Qsd1. Strategies for cloning Qsd1 with these resources are discussed.

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“…The QTL detected on chromosome 5D by the SSR marker Xbarc44, was located close to the centromere region. In barley, SD1 QTL detected near the centromere region had a large effect on grain dormancy in "Steptoe" x "Morex" cross (Han et al, 1996;Li et al, 2003, Prada, et al, 2004. Nakamura et al (2007) have proved that common causal genes affect grain dormancy regardless of the origin of two genera, Triticum and Hordeum.…”

Section: Discussionmentioning

confidence: 99%

Identification of Grain Dormancy QTLs in a White-Grained Wheat Population Derived from ‘Zen’ x ‘Spica’ Cross

Kottearachchi

Takao²,

Kato³

et al. 2010

Trop Agric Res & Ext

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White-grained wheat is usually more susceptible to preharvest sprouting (PHS). Accumulation of color independent grain dormancy QTLs is one of the promising ways of developing PHS tolerance in whitegrained wheat. A white grained recombinant inbred line (RIL) population was developed from a cross between high dormant Japanese red grained wheat, 'Zenkoujikomugi' ('Zen'), and a white cultivar 'Spica'. White-grained RILs demonstrated a severe variation proving that many genes have involved in maintaining grain dormancy. Hence, to identify those dormancy QTLs of 'Zen' x 'Spica', whole genome was assessed with SSR and EST markers. Five novel grain dormancy QTLs, linked with Xwocs207, Xcfa2163, Xbarc243, Xbarc44 and Xgwm577 markers were detected located on chromosomal arms 3BS, 5AL, 5BL, 5DL and 7BL, respectively. In all instances, allele contributed to comparatively higher dormancy was derived from 'Zen'. The QTL linked with Xwocs207 marker appeared to be extremely effective, stable and reliable. Usually QTLs rendering minor effects were difficult to be detected if the phenotypic variation of the population was affected by major red color genes. In the present study, since only the white-grained RILs were used, minor QTLs were also able to be investigated.

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Genetic control of dormancy in a Triumph/Morex cross in barley

Cited by 60 publications

References 23 publications

Isolation of three dormancy QTLs as Mendelian factors in rice

Isolation of three dormancy QTLs as Mendelian factors in rice

Genetic analysis of seed dormancy QTL in barley

Identification of Grain Dormancy QTLs in a White-Grained Wheat Population Derived from ‘Zen’ x ‘Spica’ Cross

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