Association Mapping of Root Traits for Drought Tolerance in Bread Wheat

Ahmad, Israr

doi:10.5772/67242

Cited by 7 publications

(3 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…GWAS is based on linkage disequilibrium (LD), and tightly linked genes theoretically have high LD which is maintained over generations [39]. GWAS has been used to characterize several economically important traits such as yield, disease, pest resistance, and abiotic stress tolerance in many crop species including rice [40–44], maize [45–51], barley [52–58], and wheat [59,60,69–71,61–68].…”

Section: Introductionmentioning

confidence: 99%

Assessing the genetic diversity and characterizing genomic regions conferring Tan Spot resistance in cultivated rye

et al. 2019

View full text Add to dashboard Cite

Rye ( Secale cereale L.) is known for its wide adaptation due to its ability to tolerate harsh environments in semiarid areas. To assess the diversity in rye we genotyped a panel of 178 geographically diverse accessions of four Secale sp. from U.S. National Small Grains Collection using 4,037 high-quality SNPs (single nucleotide polymorphisms) developed by genotyping-by-sequencing (GBS). PCA and STRUCTURE analysis revealed three major clusters that separate S . cereale L . from S . strictum and S . sylvestre , however, genetic clusters did not correlate with geographic origins and growth habit (spring/winter). The panel was evaluated for response to Pyrenophora tritici-repentis race 5 ( PTR race 5) and nearly 59% accessions showed resistance or moderate resistance. Genome-wide association study (GWAS) was performed on S . cereale subsp. cereale using the 4,037 high-quality SNPs. Two QTLs ( QTs . sdsu-5R and QTs . sdsu-2R ) on chromosomes 5R and 2R were identified conferring resistance to PTR race 5 ( p < 0.001) that explained 13.1% and 11.6% of the phenotypic variation, respectively. Comparative analysis showed a high degree of synteny between rye and wheat with known rearrangements as expected. QTs . sdsu-2R was mapped in the genomic region corresponding to wheat chromosome group 2 and QTs . sdsu-5R was mapped to a small terminal region on chromosome 4BL. Based on the genetic diversity, a set of 32 accessions was identified to represents more than 99% of the allelic diversity with polymorphic information content (PIC) of 0.25. This set can be utilized for genetic characterization of useful traits and genetic improvement of rye, triticale, and wheat.

show abstract

Section: Introductionmentioning

confidence: 99%

Assessing the genetic diversity and characterizing genomic regions conferring Tan Spot resistance in cultivated rye

et al. 2019

View full text Add to dashboard Cite

show abstract

“…A well-developed shallow root system is able to absorb moisture even from small rains, while a longer root system gains access to moisture accumulated in the deeper layers of the soil. These properties of the root system are es pecially important in condition of droughts, which currently represent the most serious climate threat worldwide (Ahmad et al, 2017;IPCC, 2018). It was shown that the morphological and functional features of the root system are associated with the preservation of the yield under drought conditions (Comas et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

The relationship between the genetic status of the Vrn-1 locus and the size of the root system in bread wheat (Triticum aestivum L.)

Smirnova

Пшеничникова

2022

Vestn. VOGiS

View full text Add to dashboard Cite

One of the main ways to fine-tune the adaptive potential of wheat cultivars is to regulate the timing of flowering using the genes of the Vrn-1 locus, which determines the type and rate of development. Recently, with the use of introgression and isogenic lines of bread wheat, it was shown that this locus is involved in the genetic control of root length and weight both under irrigation and drought conditions. It turned out that the VrnA1 gene is associated with a significant decrease in the size of the root system in a winter genotype. The Vrn-A1 gene had the strongest effect on the reduction of the root system in comparison with the homoeoallelic genes Vrn-B1 and Vrn-D1. The aim of this work was to determine whether the allelic composition of the genes at the Vrn-1 locus affects the root size in seven spring cultivars and in two lines of bread wheat differing in flowering time under conditions of normal watering and drought. The research was carried out in a hydroponic greenhouse; drought was created at the tillering stage. In this work, we have shown that early flowering wheat cultivars with the dominant Vrn-A1а allele have more lightweight and shorter roots under normal watering conditions compared to the late flowering carriers of the dominant homoeoalleles Vrn-B1 and Vrn-D1. In drought conditions, the root length decreased insignificantly, but the weight of the roots significantly decreased in all genotypes, with the exception of Diamant 2. It has been hypothesized that the level of the transcription factor VRN-1 at the onset of drought may affect the size of the root system. The large variability in root weight may indicate the participation, in addition to the Vrn-1 locus, of other gene networks in the formation of this trait. Breeders working to develop early maturing varieties should consider the possibility of reducing the root size, especially in arid conditions. A significant increase in the root size of line 821 with introgressions into chromosomes 2A, 2B, and 5A from T. timopheevii indicates the possibility of using congeners as a source of increasing the trait in wheat.

show abstract

“…Wheat is a rabi season crop with a worldwide creation of 694 million metric tons [4]. Wheat stands firm on a critical foothold in India's economy [5].…”

Section: Introductionmentioning

confidence: 99%

Efficacy of the Plant Extracts as Grain Protectants against Rice Weevil Sitophilus oryzae on Stored Wheat Grains

Kumar¹,

Tayde²,

Warghat³

2022

IJPSS

View full text Add to dashboard Cite

The present investigation were conducted at department of Entomology SHUATS, Prayagraj during 2021-2022 using completely randomized design with three replications and treatments neem leaf powder, turmeric rhizome powder, clove powder, pepper powder, mustard oil, soybean oil and groundnut oil. Among the selected oils and botanicals treated to wheat grains, mustard oil and soybean oil were found to be highly effective in increasing adult mortality (100 %) and reducing the per cent weight loss (0.00%) in stored wheat grains. Turmeric rhizome powder was found to be least effective among all the treatments. The maximum germination percentage, vigour index 1 and vigour index 2 was observed in grains treated with mustard oil (90%, 2250.00, 123.00) respectively on wheat grains. Turmeric rhizome powder was found to be least effective among all the treatments.

show abstract

Association Mapping of Root Traits for Drought Tolerance in Bread Wheat

Cited by 7 publications

References 38 publications

Assessing the genetic diversity and characterizing genomic regions conferring Tan Spot resistance in cultivated rye

Assessing the genetic diversity and characterizing genomic regions conferring Tan Spot resistance in cultivated rye

The relationship between the genetic status of the Vrn-1 locus and the size of the root system in bread wheat (Triticum aestivum L.)

Efficacy of the Plant Extracts as Grain Protectants against Rice Weevil Sitophilus oryzae on Stored Wheat Grains

Contact Info

Product

Resources

About