Selection of Yield-Related Traits for Wheat Breeding in Semi-Arid Region

Yan, Jiakun; Wang, Xiaolin; Zhang, Suiqi

doi:10.17957/ijab/15.0523

Cited by 8 publications

(3 citation statements)

References 23 publications

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“…Fortunately, lots of candidate genes involved in improvement-related agronomic traits such as stress response, seed size, seed number, seed maturation, seed dormancy and flowering time were obtained in the selective sweep regions. The results suggest that increasing wheat yield, as the most powerful evolutionary force, has created superior genotypes by phenotype selection and fixed in cultivars such as bigger seed size, longer spike, shorter plant height, and more kernels number per spike (Yan et al, 2018 ).…”

Section: Discussionmentioning

confidence: 99%

A Genome-Wide Association Study of Wheat Spike Related Traits in China

Liu

Fan

et al. 2018

Front. Plant Sci.

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Rapid detection of allelic variation and identification of advantage haplotypes responsible for spike related traits play a crucial role in wheat yield improvement. The released genome sequence of hexaploid wheat (Chinese Spring) provides an extraordinary opportunity for rapid detection of natural variation and promotes breeding application. Here, selection signals detection and genome-wide association study (GWAS) were conducted for spike related traits. Based on the genotyping results by 90K SNP chip, 192 common wheat samples from southwest China were analyzed. One hundred and forty-six selective windows and one hundred and eighty-four significant SNPs (51 for spike length, 28 for kernels per spike, 39 for spikelet number, 30 for thousand kernel weight, and 36 for spike number per plant) were detected. Furthermore, tightly linkage and environmental stability window clusters and SNP clusters were also obtained. As a result, four SNP clusters associated with spike length were detected on chromosome 2A, 2B, 2D, and 6A. Two SNP clusters correlated to kernels per spike were detected on 2A and 2B. One pleiotropy SNP cluster correlated to spikelet number and kernels per spike was detected on 7B. According to the genome sequence, these SNP clusters and their overlapped/flanking QTLs which have been reported previously were integrated to a physical map. The candidate genes responsible for spike length, kernels per spike and spikelet number were predicted. Based on the genotypes of cultivars in south China, two advantage haplotypes associated with spike length and one advantage haplotype associated with kernels per spike/spikelet number were detected which have not been effectively transited into cultivars. According to these haplotypes, KASP markers were developed and diagnosed across landraces and cultivars which were selected from south and north China. Consequently, KASP assay, consistent with the GWAS results, provides reliable haplotypes for MAS in wheat yield improvement.

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Section: Discussionmentioning

confidence: 99%

A Genome-Wide Association Study of Wheat Spike Related Traits in China

Liu

Fan

et al. 2018

Front. Plant Sci.

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“…However, differences in thousand grain weight were not significant between genotypes. Therefore, this superior performance in grain yield may due to more grains per each spike instead of grain size, as they had significantly longer spikes than the local check cultivar [40]. In addition, SL1 and SL2 had a wider flag-leaf area than the local check cultivar which leads to assimilate more CO2 to the grain.…”

Section: Discussionmentioning

confidence: 99%

Kalar1 and Kalar2, Newly Released Wheat Varieties for Cultivation under Rain-fed Conditions

Awtaq¹,

Azeez²,

Mahmood³

et al. 2021

KJAR

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Improving new varieties plays an important role to increase the productivity of wheat grain yield in Iraq. Garmian region as a semi-arid area is extremely suffering with low wheat yield production as a result of continuing yield potential reduction of the local cultivars over the time. This project was conducted at the Directory of Garmian Agricultural Research to develop new cultivars through four field trials from 2009 to 2013. In the selection phase, 50 lines of Facultative and Winter Wheat Observation Nurseries (16th FAWWON-IR) were screened, and three superior lines (SL1; CH75479/SARDARI-HD74, SL2; CATBERD/CNO79*2/HEF1, and SL3; ID800994.W/VEE/5/CA8055/4/ROMTAST/BON/3/DIBO//SU) to the best local check (Aras) for grain yield, thousand grain weight, anthesis date and plant height were selected for testing in three field trials of comparison phase. Averaging over years, the results of this project significantly confirmed that two of the selected lines (SL1 and SL2) performed superior (4.24 and 4.73 t h-1, respectively) to the local check (Aras; 2.83 t h-1) with regards to grain yield production by about 50-60% (P < 0.001). This superiority of the selected lines compared to the local check was due to significant longer spike through increasing grain number (P < 0.001), and wider flag-leaf area which leads to assimilate more CO2 to the grain during grain filling duration (P < 0.01). Based on these results, the superior genotypes (SL1 and SL2) were then qualified for identification and officially released (Reference Number 192, dated November 21, 2018) as new cultivars namely Kalar1 (SL1) and Kalar2 (SL2) by the National Committee for Recording and Protecting Agricultural Varieties in Iraq for the climate of Garmian region.

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“…Wheat is an important cereal crop and one of the sources of nourishment and energy for humankind (Yan et al 2018). Increasing RS content in wheat is useful for better health of the global population.…”

Section: Introductionmentioning

confidence: 99%

Virus-induced Silencing SBEIIa and SSIIa, Alone or Together, Increased the Amylose and Resistant Starch Contents in Spring Wheat

Li¹

2021

IJAB

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Foods rich in amylose and resistant starch (RS) have great potential to improve human health and lower the risk of noninfectious diseases. Common wheat (Triticum aestivumL.) is a major staple food crop with low RS content in the grains. The content of RS, preferentially derived from amylose, may be increased by suppressing amylopectin synthesis viasilencing the starch branching enzyme (SBE) II a or/and starch synthase (SS)IIa. In this study, SBEIIaand SSIIawere silenced separately and simultaneously using a barley stripe mosaic virus-virus-induced gene silencing (BSMV-VIGS) system. Compared with grains from control BSMV:00-inoculated spikes, grains from BSMV:SBEIIa-and BSMV:SSIIa-infected spikeshad fewer SBEIIa and SSIIa transcripts,together with increased amylose contents (18.62 and 24.48%, respectively) and RS contents (11.61 and 16.67%, respectively). Infection with BSMV:SBEIIa-SSIIa reduced SBEIIa and SSIIatranscript levels and increased the amylose and RS contents (32.02 and 22.33%, respectively). Thus, BSMV-VIGS is a useful tool for the rapid silencing of single or multiple starch synthase-related genes and BSMV shows great potential to study the functions of genes involved in starch biosynthesis or other processes/traits in developing grains.We showed that the SSIIagene plays an important role in the synthesis of amylose and RS and that the effects of simultaneously silencing SBEIIaand SSIIaon starch synthesis aregreater than those of single gene silencing. Our study lays the foundation for the molecular design-based breeding of high-amylose and high-RS wheat.© 2021 Friends Science Publishers

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Selection of Yield-Related Traits for Wheat Breeding in Semi-Arid Region

Cited by 8 publications

References 23 publications

A Genome-Wide Association Study of Wheat Spike Related Traits in China

A Genome-Wide Association Study of Wheat Spike Related Traits in China

Kalar1 and Kalar2, Newly Released Wheat Varieties for Cultivation under Rain-fed Conditions

Virus-induced Silencing SBEIIa and SSIIa, Alone or Together, Increased the Amylose and Resistant Starch Contents in Spring Wheat

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