QTL analysis in Barley Across Environments in Egypt

Sayed, Mohamed; El-Sadek, Ashraf; Bakry, Bakry Ahmed; Ali, Mohamed; Léon, Jens; Salem, Emad

doi:10.21608/agro.2017.525.1052

Cited by 4 publications

(4 citation statements)

References 38 publications

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“…All QTLs showed desirable performance in increasing GYP due to the presence of elite cultivar alleles (four QTLs) and exotic alleles (two QTLs). This result is consistent with 'Scarlett' being a high-yielding spring variety Sayed et al (2017). identified 13 QTL governing GYP and mapped them on all chromosomes except 5H.…”

supporting

confidence: 86%

“…Additionally, this locus region is 24.9 cM from the photoperiod Ppd-H1 gene, which also plays an important role in regulating flowering time in barley and has significant effects on agronomic traits including yield components (Karsai et al, 1999) Therefore, the mapping of HvFT genes and other genes suggests that these genes are an important source of adaptation and acclimatization variations in driving the temporal behaviour of barley. Dozens of days to heading QTLs have been detected across the entire barley genome using segregating populations (Alqudah et al, 2014;Cuesta-Marcos et al, 2009;Obsa et al, 2017;Sayed et al, 2017;Tondelli et al, 2014;Wang et al, 2016). The marker locus bPb-1609 on 3H (140.3 cM) controlled the HD and showed a pleiotropic effect with the statistic S 2 di but with different allele effects.…”

Section: Discussionmentioning

confidence: 99%

“…Most of the detected QTLs for HD did not show much pleiotropic effects. Sayed et al (2017) identified 12 putative QTLs for HD, which were mapped to chromosomes 1H, 2H, 3H, 6H, and 7H in the same population assessed in different settings. Additionally, many loci were detected on 2H where the exotic alleles decreased HD (Li et al, 2005;Pillen et al, 2003;von Korff et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

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Advanced backcross‐quantitative trait loci mapping of grain yield, heading date, and their stability parameters in barley across multienvironmental trials in Egypt

et al. 2021

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Exploring the relationship between grain yield and heading date traits and their stability parameters at phenotypic, genetic, and molecular levels is the milestone for improving yield and adaptation in barley. We evaluated a mapping population comprising 298 doubled haploid lines in multienvironmental trials in Egypt. Composite interval mapping revealed 35 quantitative trait loci (QTLs) with four pleiotropic QTLs. A major QTL bPb‐9110 (140.3 cM on 3H) with a peak LOD greater than 24 was found to be associated with the stability statistics bi and R2 of heading date. Additionally, the marker bPb‐1213 on 1H was correlated to heading date, grain yield, and the statistic bi (GYP). We also found that the gene HvFT4 (2H, 66 cM) had a significant impact on the heading date due to the presence of exotic alleles. This gene was closely linked to the photoperiod Ppd‐H1 gene by 24.9 cM, and both genes play a major role in regulating flowering time in barley. Our results provide evidence that stability statistics pinpoint genetic control and appear promising for marker‐assisted selection.

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supporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Advanced backcross‐quantitative trait loci mapping of grain yield, heading date, and their stability parameters in barley across multienvironmental trials in Egypt

et al. 2021

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“…The authorities promote the increase of wheat production via (i) vertical expansion by way of offering the wheat farmers all their needs including fertilizers, pesticides, advice, laboratory support, and first-class cultivars, and (ii) horizontal expansion by cultivating wheat in new and reclaimed lands. Hopefully, given its political effort, Egypt may have witnessed in 2019 a ranking of 5th among the regions of high grain productivity [24] with the benefit of introducing new cultivars [25]. Because rain precipitation may decrease in the future, the wheat yield of this country could fall by as much as 9% in 2030 and by 20% in 2060 [3,26].…”

Section: Introductionmentioning

confidence: 99%

Plant Tolerance to Drought Stress with Emphasis on Wheat

Adel

Carels

2023

Plants

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Environmental stresses, such as drought, have negative effects on crop yield. Drought is a stress whose impact tends to increase in some critical regions. However, the worldwide population is continuously increasing and climate change may affect its food supply in the upcoming years. Therefore, there is an ongoing effort to understand the molecular processes that may contribute to improving drought tolerance of strategic crops. These investigations should contribute to delivering drought-tolerant cultivars by selective breeding. For this reason, it is worthwhile to review regularly the literature concerning the molecular mechanisms and technologies that could facilitate gene pyramiding for drought tolerance. This review summarizes achievements obtained using QTL mapping, genomics, synteny, epigenetics, and transgenics for the selective breeding of drought-tolerant wheat cultivars. Synthetic apomixis combined with the msh1 mutation opens the way to induce and stabilize epigenomes in crops, which offers the potential of accelerating selective breeding for drought tolerance in arid and semi-arid regions.

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