Quantitative Trait Loci Analysis for the Effect of <i>Rht‐B1</i> Dwarfing Gene on Coleoptile Length and Seedling Root Length and Number of Bread Wheat

Li, Pengmin; Chen, J.; Wu, Pute; Zhang, J.; Chu, Chenggen; See, Deven R.; Brown-Guedira, Gina; Zemetra, Robert S.; Souza, E.

doi:10.2135/cropsci2011.03.0116

Cited by 43 publications

(35 citation statements)

References 30 publications

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“…Singh et al (2016) found that the common bunt HPR QTL co-localized with other beneficial traits including height and rust resistance. The three IDO444-derived QTL have no pleiotropic effect on other traits, such as coleoptile and root length (Li et al 2011), stripe rust (Chen et al 2012), grain yield, heading data, or height (Zhang et al 2014) previously mapped in this population.…”

Section: Discussionmentioning

confidence: 95%

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A novel QTL associated with dwarf bunt resistance in Idaho 444 winter wheat

et al. 2016

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Key message A novel QTL, Q.DB.ui-7DS, and the PCR-based markers identified in the current study will accelerate variety development for resistance to dwarf and common bunt of wheat. AbstractDwarf bunt [Tilletia controversa J.G. Kühn [as ‘contraversa’], in Rabenhorst, Hedwigia 13: 188 (1874)] is a destructive disease of wheat (Triticum aestivum L.) that reduces grain yield and quality. A number of distinct genes conferring resistance to dwarf bunt have been used by breeding programs for nearly 100 years. However, few markers were identified that can be used in selection of dwarf bunt resistance. A recombinant inbred line (RIL) population derived from the bunt-resistant germplasm, Idaho 444 (IDO444), and the susceptible cultivar, Rio Blanco, was evaluated for phenotypic reaction to dwarf bunt inoculation in four trials in two locations (USU and USDA) over 3 years. The population was genotyped with the Diversity Arrays Technology (DArT) and the Illumina Infinium 9K iSelect marker platforms. A total of three QTL were detected, and resistant alleles were from IDO444. QTL Q.DB.ui-7DS on 7DS was determined based on the location of a DArT marker wPt-2565 (X116197), which was consistently detected and explained 32 to 56 % of phenotypic variation among the four trials. QTL Q.DB.ui-1A on 1A was detected in three Utah State University (USU) trials and explained 11–15 % of phenotypic variation. QTL Q.DB.ui-2B on 2B was detected in two USU and one United States Department of Agriculture (USDA) trials and explained up to 6 % of phenotypic variation. Two PCR-based markers were developed based on the sequence of wPt-2565 and validated in the RIL population and used in genotyping of dwarf bunt differential lines, known resistance sources, and resistant cultivars.

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Section: Discussionmentioning

confidence: 95%

“…However, it has poor pan bread quality (Windes et al 1995). IDO444 had longer coleoptiles (Li et al 2011) and greater grain yield than Rio Blanco in rain-fed conditions (Zhang et al 2014). …”

Section: Methodsmentioning

confidence: 99%

A novel QTL associated with dwarf bunt resistance in Idaho 444 winter wheat

et al. 2016

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“…The materials used in this study were selected from a mapping population comprised of 159 F 8:9 recombinant inbred lines (RILs) from a cross IDO444 x Rio Blanco (Li et al, 2011;Chen et al, 2012;Zhang et al, 2014). "IDO444" (no known dwarfing alleles, PI578278) is a tall winter wheat line with improved disease resistance and grain yield (Windes et al, 1995;Zhang et al, 2014), while "Rio Blanco" (Rht4+Rht-B1b, PI531244) is a semi-dwarf hard white winter wheat cultivar released by Agripro Biosciences Inc., Shawnee Mission, KS and widely used in wheat breeding programs (Wu and Carver, 1999;Martin et al, 2001;Carver et al, 2003;Haley et al, 2003;Zhang et al, 2014).…”

Section: Plant Materialsmentioning

confidence: 99%

Dwarfing genes Rht4 and Rht-B1b affect plant height and key agronomic traits in common wheat under two water regimes

Liu

Zhang

et al. 2017

Field Crops Research

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To explore the potential utilization of Rht4 in wheat improvement, we investigated and compared the effects of Rht4 and Rht-B1b on the plant height and yield components using four groups of recombinant inbred lines derived from the cross between "IDO444" (tall, no known dwarfing alleles) and "Rio Blanco" (semi-dwarf, Rht4+Rht-B1b) grown under two water regimes. Rht4, Rht-B1b and Rht4+Rht-B1b significantly reduced plant height by 11.5%, 19.3% and 18.2%, respectively. There were no additive effects on plant height in Rht4+Rht-B1b lines. Both Rht4 and Rht-B1b significantly reduced internode length and lodging score with stronger effects by Rht-B1b. Water stress affected the plant height related traits of the single Rht-B1b lines more than that of the Rht4 lines, except for distance from spike to flag leaf ligule. Grain number was increased by Rht4 and Rht-B1b, but higher spike numbers was only observed in lines with Rht-B1b. Both Rht4 and Rht-B1b significantly reduced thousand kernels weight. Rht-B1b reduced above-ground biomass but increased grain yield and harvest index, while Rht4 had less effect on these traits, compared with tall lines under both well-watered and water-3 stressed conditions. The Rht4+Rht-B1b lines produced the highest yield under both water regimes, with more grain number, greater spike number and higher harvest index. In conclusion, Rht4 did not show advantages over Rht-B1b on grain yield, but Rht4+Rht-B1b did, in both water regimes, which suggests that Rht4 should be combined with Rht-B1b in wheat improvement.

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“…The RhtB1b allele induces insensitiveness to gibberellic acid, thus preventing stem elongation (Peng et al 1999;Hedden 2003). In addition to the reduced height of the plant, the Rht-B1b allele has well-known pleiotropic effects on plant growth, and morphological and physiological characters (Gale and Youssefian 1985;Li et al 2011;Rebetzke et al 2012). It increases yield, mostly under favourable conditions, by altering the proportion of dry matter allocated to grain (De Vita et al 2007;Royo et al 2007Royo et al , 2008Álvaro et al 2008a).…”

Section: Introductionmentioning

confidence: 99%

Changes in durum wheat root and aerial biomass caused by the introduction of the Rht-B1b dwarfing allele and their effects on yield formation

et al. 2016

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Aims This study aimed to quantify the changes in root and aerial biomass of durum wheat brought about by the introduction of the Rht-B1b dwarfing allele and their effects on yield formation. Methods A historical series of 24 Mediterranean cultivars with allelic variants a (tall) and b (semi-dwarf) at Rht-B1 locus was tested in tubes in three greenhouse experiments and six field experiments. Results The dwarfing allele reduced the aerial biomass of each plant at anthesis by 7.6 % and the root by 28.1 % (25.4 %, 26.7 % and 36.0 % in the upper, middle and lower root sections, respectively). Aerial and root biomass were reduced by 27.0 g y −1 and 7 g y −1 respectively, but the relative rate of change was much greater for roots (−0.73 % y −1) than for aerial organs (−0.17 % y −1 ). Aerial biomass at anthesis was negatively associated with spike number, harvest index and yield in tall cultivars, but no significant relationship was found for semi-dwarf ones.Conclusions The root/aerial biomass ratio was 29 % lower in semi-dwarf than in tall cultivars. In tall cultivars large aerial biomass at anthesis was detrimental to yield formation, while in semi-dwarf cultivars high aerial biomass at anthesis had no effect on yield formation.

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Quantitative Trait Loci Analysis for the Effect of Rht‐B1 Dwarfing Gene on Coleoptile Length and Seedling Root Length and Number of Bread Wheat

Cited by 43 publications

References 30 publications

A novel QTL associated with dwarf bunt resistance in Idaho 444 winter wheat

A novel QTL associated with dwarf bunt resistance in Idaho 444 winter wheat

Dwarfing genes Rht4 and Rht-B1b affect plant height and key agronomic traits in common wheat under two water regimes

Changes in durum wheat root and aerial biomass caused by the introduction of the Rht-B1b dwarfing allele and their effects on yield formation

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