Genetic associations in the detection of QTLs for wheat spike-related traits

Brbaklić, Ljiljana; Trkulja, Dragana; Kondić‐Špika, Ankica; Hristov, Nikolay; Denčić, Srbislav; Mikić, Sanja; Tomicic, Marina; Kobiljski, Borislav

doi:10.1590/s0100-204x2015000200007

Cited by 8 publications

(4 citation statements)

References 26 publications

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“…PIC value which ensures an information in about discriminating power of a marker [ 35 ] ranged from 0.5 (Xgwm312) to 0.86 (WMC177), with a mean of 0.67. This mean PIC value is higher than those were reported for Indian emmer wheat accessions [ 36 ], Ethiopian emmer landraces [ 37 ] and Italian emmer wheat accessions [ 38 ], but lower than the value of 0.68 reported by [ 39 ] for 283 of wheat accessions. The allele number of per loci was ranged from 6 (Xgwm135 and Xgwm312) to 16 (WMC177).We observed that the average number of alleles per locus was 9.…”

Section: Discussioncontrasting

confidence: 77%

Molecular and agro-morphological characterization of ancient wheat landraces of turkey

et al. 2017

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BackgroundTurkey is one of the important gene centers for many crop species. In this research, some ancient wheats such as tetraploid and diploid hulled wheats together with hexaploid tir wheats (Triticum aestivum ssp. leucospermum Korn.) landraces mainly adapted to harsh winter conditions of Eastern Anatolian region of Turkey were characterized at agro-morphological and molecular level. Totally 50 hulled wheat population from Kastamonu, Konya and Kayseri provinces and 15 tir wheats from Kars provinces of Turkey were in-situ collected for characterization in 2013. Some quantitative and qualitative traits of each population were determined.ResultsTwenty three hulled wheat population collected from Kastamonu province were distinguished into nine emmer and 14 einkorn wheats at morphological level. Additionally, Konya, Kayseri and Kars population were characterized as einkorn, emmer and tir wheat, respectively. Among the evaluated traits, protein ratios of hulled wheats were strikingly higher than registered cultivars. All the populations were also examined by molecular level by using fluorescently labelled 11 polymorphic SSRs primers. The primers exhibited 104 bands, ranging from 6 to 16 with a mean value 9.45 per loci. The clustering analysis separated the germplasm into two clusters which were also divided into two subclusters based on genetic similarity coefficient. Sixty-five population and five checks were analyzed to estimate mean number of alleles (N), expected and observed heterozygoties (He and Ho), polymorphism information content (PIC), Wright fix index (F), genetic deviation from Hardy-Weinberg expectation (Fit-Fis) and genetic variation (Fst) were determined as 9.45, 0.71, 0.07, 0.67, 0.90, 0.39, 0.87 and 0.39, respectively. A clear genetic deviation from Hardy – Weinberg expectation was observed among population in particular. These results showed considerable genetic variation among landraces rather than within population.ConclusionsThese molecular information has revealed genetically diverse einkorn, emmer wheat and tir wheat population could be used as parents for further breeding studies in both Turkey and abroad. Furthermore, the molecular analysis has also generally discriminated the germplasm into ploidy level.

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Section: Discussioncontrasting

confidence: 77%

Molecular and agro-morphological characterization of ancient wheat landraces of turkey

et al. 2017

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“…Gene mapping provides the identification of major genes and quantitative trait loci (QTLs) associated with phenotypic variation, enabling better insight into the genetic control of agronomically important traits and suppling fundamental information for MAS, gene cloning, and genome structure studies (Brbaklić et al, 2015;Dimitrijevic and Horn, 2018;Gupta et al, 2019;Trkulja et al, 2019). The process relies on the comprehensive genotyping and phenotyping of various genetic materials, followed by appropriate statistical analysis for the detection of genes and QTLs.…”

Section: Gene Mapping and Masmentioning

confidence: 99%

Genomics-assisted speed breeding for crop improvement: present and future

Ćeran,

Miladinović,

Đorđević

et al. 2024

Front. Sustain. Food Syst.

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Global agricultural productivity and food security are threatened by climate change, the growing world population, and the difficulties posed by the pandemic era. To overcome these challenges and meet food requirements, breeders have applied and implemented different advanced techniques that accelerate plant development and increase crop selection effectiveness. However, only two or three generations could be advanced annually using these approaches. Speed breeding (SB) is an innovative and promising technology to develop new varieties in a shorter time, utilizing the manipulation of controlled environmental conditions. This strategy can reduce the generation length from 2.5 to 5 times compared to traditional methods and accelerate generation advancement and crop improvement, accommodating multiple generations of crops per year. Beside long breeding cycles, SB can address other challenges related to traditional breeding, such as response to environmental conditions, disease and pest management, genetic uniformity, and improving resource efficiency. Combining genomic approaches such as marker-assisted selection, genomic selection, and genome editing with SB offers the capacity to further enhance breeding efficiency by reducing breeding cycle time, enabling early phenotypic assessment, efficient resource utilization, and increasing selection accuracy and genetic gain per year. Genomics-assisted SB holds the potential to revolutionize plant breeding by significantly accelerating the identification and selection of desirable genetic traits, expediting the development of improved crop varieties crucial for addressing global agricultural challenges.

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“…It was detected QTL for PL on the same chromosome with different SSR marker Xgwm294 (76 cM) (Brbaklić et al, 2015).…”

Section: Chromosome 2amentioning

confidence: 99%

Genetic Dissection of Stem Water-Soluble Carbohydrates and Agronomic Traits in Wheat under Different Water Regimes

Nadia¹,

Chang²,

Jing³

2017

JAS

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Drought is a major environmental stress threatening wheat (Triticum aestivum L.) productivity worldwide. Although drought impedes wheat performance at all growth stages, it is more critical during the flowering and grain-filling phases and results in substantial yield losses. In this context, stem water-soluble carbohydrates (SWSC) were dissected at flowering and grain filling stages under drought stress (DS) and well-watered (WW) conditions using a population consisted of 116 wheat accessions in this research. The main goal was to dissect the genetic basis of water-soluble carbohydrates and the agronomic traits using association mapping approach and identify linked molecular markers. The results showed significant and positive correlations for stem water-soluble carbohydrates at grain filling (SWSCG) with accumulating efficiency of stem water-soluble carbohydrates (AESWSC) and grain filling efficiency at the late stage (GFEL). The accumulating and grain filling efficiency at grain filling stage could play an important role for SWSC especially under DS condition. Four favorable alleles for plant height (PH) and grain yield (GY) were identified in two water environments. Xbarc78-4A 163 and Xbarc78-4A 155 were variant alleles for PH which were identified in both water regimes. Whereas Xwmc25-2D positively linked with GY in WW. Although Xwmc420-4A 121 and Xwmc112-2D 215 were alleles for stem water-soluble carbohydrates at flowering (SWSCF) and SWSCG in DS but the frequency were < 5% so they were considered as rare alleles. These SSR markers which explained significant level of phenotypic variability for chosen traits could be used for selection of genotypes in wheat breeding programs through marker-assisted selection.

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Genetic associations in the detection of QTLs for wheat spike-related traits

Cited by 8 publications

References 26 publications

Molecular and agro-morphological characterization of ancient wheat landraces of turkey

Molecular and agro-morphological characterization of ancient wheat landraces of turkey

Genomics-assisted speed breeding for crop improvement: present and future

Genetic Dissection of Stem Water-Soluble Carbohydrates and Agronomic Traits in Wheat under Different Water Regimes

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