Identification of QTLs for yield and yield components of barley under different growth conditions

Xue, Dawei; Zhou, Meixue; Zhang, Xiaoqin; Song, Chen; Wei, Kang; Zeng, Fanrong; Mao, Ying; Wu, Feibo; Zhang, Guoping

doi:10.1631/jzus.b0900332

Cited by 62 publications

(59 citation statements)

References 30 publications

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“…Some of the QTL involved in adaptation to waterlogging have been identified [12,26], but their efficiency may depend on the method used [27]. The use of fluorescence and hydroponics could hence improve the accuracy of searches for new QTL for introgressing into barley with the aim of creating new cultivars with enhanced adaptation to waterlogging.…”

Section: Discussionmentioning

confidence: 99%

Screening for Barley Waterlogging Tolerance in Nordic Barley Cultivars (Hordeum vulgare L.) Using Chlorophyll Fluorescence on Hydroponically-Grown Plants

Bertholdsson

2013

Agronomy

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Waterlogging can reduce crop yield by 20%-50% or more, and lack of efficient selection methods is an obstacle in plant breeding. The methods currently used are mainly indices based on germination ability in Petri dishes and leaf chlorosis in plants grown in waterlogged soils. Cultivation in oxygen-depleted nutrient solution is the ultimate waterlogging system. Therefore methods based on root growth inhibition and on fluorescence in plant material hydroponically grown in oxygen-depleted solution were evaluated against data on biomass accumulation in waterlogged soils. Both traits were correlated with waterlogging tolerance in soil, but since it was easier to measure fluorescence, this method was further evaluated. A selection of F 2 plants with high and low fluorescence revealed a small but significant screening effect in F 3 plants. A test of 175 Nordic cultivars showed large variations in chlorophyll fluorescence in leaves from oxygen-stressed seedlings, indicating that adaptation to waterlogging has gradually improved over the past 40-50 years with the introduction of new cultivars onto the market. However, precipitation also increased during the period and new cultivars may have inadvertently been adapted to this while breeding barley for grain yield. The results suggest that the hydroponic method can be used for screening barley populations, breeding lines or phenotyping of populations in developing markers for quantitative trait loci.

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Section: Discussionmentioning

confidence: 99%

Screening for Barley Waterlogging Tolerance in Nordic Barley Cultivars (Hordeum vulgare L.) Using Chlorophyll Fluorescence on Hydroponically-Grown Plants

Bertholdsson

2013

Agronomy

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“…The methods currently used are indices based on leaf chlorosis (Li et al 2008), germination ability (Takeda and Fukuyama 1987), biomass growth reduction (Zhou et al 2012) and yield components (Xue et al 2010;Walker et al 2013). Most of these traits are difficult to use in breeding, especially in field selection with high genotype-by-environment interaction.…”

Section: Introductionmentioning

confidence: 99%

QTL for chlorophyll fluorescence of barley plants grown at low oxygen concentration in hydroponics to simulate waterlogging

Bertholdsson

Holefors²,

Macaulay

et al. 2014

Euphytica

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Waterlogging is a major factor limiting barley grain yield worldwide. Climate change will likely increase this water stress in Northern Europe. Breeding for waterlogging tolerance (WLT), as for other abiotic stresses, is difficult, but identification of genetic markers linked to genes affecting WLT could facilitate the breeding process. To identify a suitable marker population, parents of 14 double-haploid (DH) barley populations were tested for segregation of biomass growth reduction in waterlogged soil. The most interesting was found in the offspring from crossing cv. Psaknon and breeding line (SLUdt1398 9 Mona 4 ). Hence, 120 DH-lines derived from this cross were phenotyped for the chlorophyll fluorescence parameter quantum yield (QY) of electron transport of PSII from leaves of hypoxia-stressed plants and further genotyped with 384-SNP Illumina GoldenGate Bead Array. Five quantitative trait loci (QTL) for QY, with a narrow sense heritability of 0.87, were identified on chromosomes 4, 6 and 7H. They had additive effects ranging from 0.74 to 1.35 % with LOD scores from 3 to 12 and explained variance from 6 to 29 %. The major alleles for high QY were from cv. Psaknon; i.e., QY was low if the alleles from cv. Psaknon were not present. Based on leaf necrosis and residual biomass data, the four most interesting QTL may be also in two other populations with completely different progeny, which shows a certain stability of these QTL. The possibility of using marker assistant selection for WLT is discussed, as is possible concurrent improvement of drought tolerance and grain yield.

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“…The remaining QTL effecting spike length on chromosome 2H characterized by the SNP MK 7144-973 at 102.8 cM and 4H characterized by the SNP MK 2129-1928 at 19.0 cM were in regions previously identified (Xue et al, 2010). MK 7144-973 is orthologous to rice Os04g43390, which is in a close proximity to rice auxin-responsive SAUR18 gene Os04g43740 implicated in plant growth.…”

Section: Discussionmentioning

confidence: 82%

“…In the same study, on 1H at 157 cM, 3H at 20 cM, 5H at 138 cM and 6H at 95 cM affected only spike length. Work by Xue et al (2010) identified QTL in the same region on chromosome 2H and 4H affecting both spike length and yield. Overall, this provides strong evidence of an underlying genetic mechanism on chromosome 2H and 4H, however, suitable genetic markers for breeding application and underlying mechanisms of this trait were not provided.…”

Section: Introductionmentioning

confidence: 99%

A new genetic linkage map of barley (Hordeum vulgare L.) facilitates genetic dissection of height and spike length and angle

Islamovic¹,

Obert²,

Oliver

et al. 2013

Field Crops Research

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a b s t r a c tPlant height and spike length and angle are important agronomic traits in the production of barley (Hordeum vulgare L.) due to strong correlations with lodging and disease. The objective of this study was to use QTL analysis to identify genetic regions associated with each trait in a recombinant inbred line (RIL) mapping population derived from a cross of Falcon by Azhul. Falcon is a spring six-row hulless feed barley with long spikes displaying obtuse angles, while Azhul is a spring dwarf, six-row hulless food barley with short spikes displaying acute angles. The population was genotyped using SNP, DArT and SSR markers and quantitative trait loci (QTL) were detected on chromosomes 2H (102.8 cM, spike length), 3H (89.2 cM, plant height and 38.2, spike angle and length), 4H (19.0 cM, spike length), and 5H (106.7 cM, spike angle). In conclusion, we developed a barley genetic map, which incorporated SNP, DArT and SSR markers, for detection of height and spike length and angle QTL. Three spike angle, one spike length and one plant height QTL were novel and by using comparative genomics we identified possible candidate genes involved in gibberellic acid signaling and auxin-and ethylene-responsive pathways. This knowledge can be used to generate suitable markers for barley breeding improvement. Published by Elsevier B.V.

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Identification of QTLs for yield and yield components of barley under different growth conditions

Cited by 62 publications

References 30 publications

Screening for Barley Waterlogging Tolerance in Nordic Barley Cultivars (Hordeum vulgare L.) Using Chlorophyll Fluorescence on Hydroponically-Grown Plants

Screening for Barley Waterlogging Tolerance in Nordic Barley Cultivars (Hordeum vulgare L.) Using Chlorophyll Fluorescence on Hydroponically-Grown Plants

QTL for chlorophyll fluorescence of barley plants grown at low oxygen concentration in hydroponics to simulate waterlogging

A new genetic linkage map of barley (Hordeum vulgare L.) facilitates genetic dissection of height and spike length and angle

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