Ata-ur Rehman

Dr. Ata-ur Rehman


Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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31 October 2024 in Plants
Verified
Journal Article
Open access
PDF file
DLDanping Li
Danping Li
YXYanjun Xiao
Yanjun Xiao
LGLei Guo
Lei Guo
BSBaoxue Shan
Baoxue Shan
XLXiukun Liu
Xiukun Liu
XCXinyou Cao
Xinyou Cao
It is a consensus that Earth’s climate has been warming. The impact of global warming is asymmetric, that is, there is more substantial warming in the daily minimum surface air temperature and lower warming in the maximum surface air temperature. Previous studies have reported diurnal temperature differences greatly affecting winter wheat yield. However, only a few studies have investigated the impact of global warming on the growth and yield of winter wheat, yet the influence of night warming on quality has not been deeply evaluated. In this study, two wheat cultivars were used as materials: Jimai 44 (JM44) with strong gluten and Jimai 22 (JM22) with medium gluten, to explore the effects of high nighttime temperatures (HNTs) on the growth, yield, and quality of wheat. The results show that HNTs significantly shortened seedling emergence and anthesis periods in both cultivars compared with ambient temperatures (ATs). In addition, HNTs increased the respiration rate at anthesis and grain-filling stages, impeding wheat pollination and grain maturity. HNTs also accelerated leaf senescence and increased the number of sterile spikelets and plant height, but decreased the effective tiller number, the number of spikes per unit area, and grains per spike. As a result, the grain yield of JM22 and JM44 was decreased by 24.6% and 21.2%, respectively. Moreover, HNTs negatively influenced the flour quality of the two wheat cultivars. The current findings provide new insights into the effects of HNTs on the growth, development, yield, and quality of different wheat genotypes during the whole growth period.

12 November 2024 in Discover Agriculture
Verified
Journal Article
Open access
PDF file
AKAbdul Manan Khan
Abdul Manan Khan
ZAZulfiqar Ali
Zulfiqar Ali
AMAta Ul Mohsin
Ata Ul Mohsin
ASAijaz Ahmed Soomro
Aijaz Ahmed Soomro
KHKhalid Hussain
Khalid Hussain
CBChris Blanchard
Chris Blanchard
The study of genotype × environment interaction is crucial for plant breeders to introduce new cultivar(s) with improved and stable yield performance. The productivity of chickpea crops is very low in Pakistan. It requires the selection of genotypes with optimal productivity for diverse environmental conditions. Fourteen different chickpea genotypes were assessed using the linear mixed model to evaluate genotypes across four diverse chickpea growing regions, including Attock (Punjab), Bhakkar (Punjab), Karak (Khyber Pakhtunkhwa), and Larkana during the year 2017–19. The environmental effect was pronounced and contributed significantly to variation (25.8%) in grain yield. Analysing genotype × environmental interactions at multiple locations facilitates ranking superior genotypes that excel in specific or diverse environments. Notably, the genotypes, viz., Fakhr-e-Thal and Bhakkar-2011, demonstrated superior performance in terms of overall grain yield. Utilising a multitrait stability index, Bittal-2016 and Thal-2006 exhibited the most stable genotypes across various environments and were observed suitable for diverse growing regions. While, for specific environmental conditions, genotypes, i.e., KK-1, Noor-2013 and Fakhr-e-thal, exhibited higher yields and stability. This showed their adaptability to the particular environment. The present study revealed that Larkana as the mega environment was conducive to higher yield, while Attock, Bhakkar, and Karak sites were less favorable for KK-3, DG-89, and Dasht. The BLUP outperformed the AMMI in our analysis of evaluating multi-location trials. The integration of WAASBY and MTSI indices proved useful in differentiating between high yielding genotypes and those with stable performance. These tools are essential for breeders aiming to select genotypes that will perform consistently across diverse environmental conditions.

4 April 2021 in Molecules
Verified
Journal Article
Open access
PDF file
SHSAIRA HUSSAIN
SAIRA HUSSAIN
ARAta-ur Rehman
Ata-ur Rehman
DLDavid Luckett
David Luckett
SNSyed Muhammad Saqlan Naqvi
Syed Muhammad Saqlan Naqvi
CBChristopher Blanchard
Christopher Blanchard
Valorization of vegetable oil waste residues is gaining importance due to their high protein and polyphenol contents. Protease inhibitors (PIs), proteins from these abundantly available waste residues, have recently gained importance in treating chronic diseases. This research aimed to use canola meal of genetically diverse Brassica napus genotypes, BLN-3347 and Rivette, to identify PIs with diverse functionalities in therapeutic and pharmacological applications. The canola meal PI purification steps involved: native PAGE and trypsin inhibition activity, followed by ammonium sulfate fractionation, anion exchange, gel filtration, and reverse-phase chromatography. The purified PI preparations were characterized using SDS-PAGE, isoelectric focusing (IEF), and N terminal sequencing. SDS-PAGE analysis of PI preparations under native reducing and nonreducing conditions revealed three polymorphic PIs in each genotype. The corresponding IEF of the genotype BLN-3347, exhibited three acidic isoforms with isoelectric points (pI) of 4.6, 4.0, and 3.9, while Rivette possessed three isoforms, exhibiting two basic forms of pI 8.65 and 9.9, and one acidic of pI 6.55. Purified PI preparations from both the genotypes displayed dipeptidyl peptidase-IV (DPP-IV) and angiotensin-converting enzyme (ACE) inhibition activities; the BLN-3347 PI preparation exhibited a strong inhibitory effect with lower IC50 values (DPP-IV 37.42 µg/mL; ACE 129 µg/mL) than that from Rivette (DPP-IV 67.97 µg/mL; ACE 376.2 µg/mL). In addition to potential human therapy, these highly polymorphic PIs, which can inhibit damaging serine proteases secreted by canola plant pathogens, have the potential to be used by canola plant breeders to seek qualitative trait locus (QTLs) linked to genes conferring resistance to canola diseases.

8 April 2024 in Research Square
Verified
Preprint
Open access
PDF file
AKAbdul Manan Khan
Abdul Manan Khan
ZAZulfiqar Ali
Zulfiqar Ali
AMAtaul Mohsin
Ataul Mohsin
ASAijaz Soomro
Aijaz Soomro
KHKhalid Hussain
Khalid Hussain
CBChris Blanchard
Chris Blanchard
The study of genotype × environment interaction is crucial for plant breeding to introduce new cultivars with im-proved yield and stable performance. The productivity of chickpea crops is very low in Pakistan, requiring the se-lection of genotypes with optimal productivity for diverse environmental conditions. Fourteen different chickpea genotypes were assessed using the linear mixed model to evaluate genotypes across four diverse chickpea growing regions, including Attock (Punjab), Bhakkar (Punjab), Karak (Khyber Pakhtunkhwa), and Larkana during 2017-19. The environmental effect was very pronounced, contributing significantly to variation (25.8%) in grain yield. Analysing genotype × environmental interaction at multiple locations facilitates ranking superior genotypes that excel in specific or diverse environments. Notably, the genotypes viz. Fakhr-e-Thal and Bhak-kar-2011 demonstrated superior performance in terms of overall grain yield. Utilising a multi-trait stability index, Bittal-2016 and Thal-2006 emerged as the most stable genotypes across various environments, suggesting their suitability for diverse growing regions. On the other hand, for specific environmental conditions, genotypes KK-1, Noor-2013 and Fakhr e thal exhibited high yields but low stability, showcasing their adaptability to a particular environment. The The analysis revealed that Larkana is a mega environment conducive to higher yield, while At-tock, Bhakkar, and Karak were identified as less favorable for KK-3, DG-89, and Dasht. The findings hold signif-icant implications for expediting chickpea breeding efforts to improve the genotypic plasticity and understanding correlation patterns among traits to confer climatic resilience. Finding high-yielding, stable genotypes and their representative environment offers new breeding opportunities and boosts production for chickpea cultivars.