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Early selection of bread wheat genotypes using morphological and photosynthetic attributes conferring drought tolerance

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Journal of Integrative Agriculture 2019年第11期18卷 2483-2491页

作者： Hafiz Ghulam Muhu-Din Ahmed Abdus Salam k.an LI Ming-ju sultan habibullah k.an Muhammad kashif Department of Plant Breeding and Genetics University of Agriculture FaisalabadFaisalabad 38000Pakistan Institute of Agricultural Environment and Resources Yunnan Academy of Agricultural SciencesKunming 650205P.R.China Center of Agricultural Biotechnology and Biochemistry University of Agriculture FaisalabadFaisalabad 38000Pakistan

Genetic diversity is the base of any genetic improvement breeding program aimed at stress *** variability among breeding materials is of primary importance in the achievements of a good crop ***,105 wheat genotypes were screened against drought stress using factorial completely randomized design at seedling stage to determine the genetic diversity and traits association conferring drought *** of variances revealed that all the studied parameters differed significantly among all genotypes,indicating the significance genetic variability existed among all genotypes for studied *** 10 best performance genotypes G1,G6,G11,G16,G21,G26,G39,G44,G51,and G61 were screened as drought tolerant,while five lowest performance genotypes G3,G77,G91,G98,and G105 were screened as drought *** length,chlorophyll a,chlorophyll b,and carotenoid contents were significantly correlated among themselves which exhibited the importance of these indices for rainfed areas in future wheat breeding *** length exhibited non-significant and negative association with other studied traits,and its selection seems not to be a promising criteria for this germplasm for drought *** performance genotypes under drought stress conditions will be useful in future wheat breeding program and early selection will be effective for developing high yielding and drought tolerant wheat varieties.

关键词： drought photosynthesis chlorophyll wheat seedling carotenoid

Pedigree and SSR Data Analysis Reveal Dominant Prevalence of Few Parents in Pedigrees of Pakistani Wheat Varieties

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American Journal of Molecular Biology 2015年第1期5卷 1-6页

作者： Muhammad Sajjad sultan habibullah k.an Rizwana Maqbool Department of Environmental Sciences COMSATS Institute of Information Technology Vehari Pakistan Center for Agricultural Biochemistry and Biotechnology University of Agriculture Faisalabad Pakistan Department of Crop and Soil Sciences Washington State University Pullman USA

The international recognition of the importance of genetic diversity demands continuous estimation of genetic diversity of in hand population as test of its buffering capacity against all putative threats. Randomly selected Pakistani wheat varieties developed during 1965-1999 and 2000-2011 were evaluated on the basis of pedigree and SSR data. At 2nd and 3rd levels of pedigree, average occurrence of a parent per variety was 2.1 times. The dominating parents included BLUEBIRD, kALYANSONA and SIETE-CERROS-66, which were present in the pedigrees of 71.42%, 64.28%, and 58.57% varieties, respectively. The varieties INQLAB-91 and kIRAN-95 had the same pedigree and were genetically identical as revealed by SSR data. Similarly, varieties PAVON-76 and SOGHAT-90 also had the same parents in their pedigrees. This genetic similarity was also confirmed by SSR based cluster. The SSR based PC1 and PC2 showed narrow genetic diversity confirming the presence of few dominating parents. The results emphasize the inclusion of novel and genetically diverse parents in Pakistani wheat breeding programs to maintain broader genetic base of varieties/cultivars for buffering the effects of ever changing virulent pathogens and crop growth environments.

关键词： Genetic Diversity Pedigrees SSR Wheat

Family and/or Friends? Gene Mapping at Crossroads

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American Journal of Plant Sciences 2014年第1期5卷 112-118页

作者： Muhammad Sajjad sultan habibullah k.an Rashid Mehmood Rana Center of Agricultural Biochemistry and Biotechnology (CABB) University of Agriculture Faisalabad Pakistan Department of Plant Breeding and Genetics Pir Mehr Ali Shah-Arid Agriculture University Rawalpindi Pakistan

Mapping gene(s) underlying a specific trait offers an opportunity to plant breeders to apply marker assisted selection. All gene mapping approaches except LD mapping use family based segregation populations developed by crossing two or more parents. These family based gene mapping approaches include simple interval mapping, composite interval mapping, multiple interval mapping and Bayesian mapping etc. Each approach has its own advantages and disadvantages based on type of population and underlying statistical model. Unlike family based approaches, LD mapping uses population of unrelated individuals which are like friends belonging to different family backgrounds. Relative pros and cons of family and friends based approaches make them complementary to each other. Family based approaches identify wide chromosomal region underlying the trait of interest with relatively lower markers density, and therefore, have low mapping resolution. Conversely, friends based LD mapping identifies chromosomal region of interest with higher resolution using higher marker density. The integration of family and friends based approaches addresses their respective pros and cons successfully to enhance mapping resolution for more valid application of marker assisted selection.

关键词： Family Based Mapping LD Mapping NAM

Genome Editing Tools: Need of the Current Era

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American Journal of Molecular Biology 2019年第3期9卷 85-109页

作者： Sabin Aslam sultan habibullah k.an Aftab Ahmed Abhaya M. Dandekar Center of Agricultural Biochemistry and Biotechnology University of Agriculture Faisalabad Pakistan Center of Advanced Studies in Agriculture and Food Security University of Agriculture Faisalabad Pakistan Department of Plant Sciences University of California Davis CA USA

Genome editing is considered as the most widely used approach of the present era. It had become a basic need of the current micro and molecular biological experiments. Gene engineering finds its widespread applications in medical, industry and agricultural sector. Unlike previous genetic engineering practices to insert or delete a part of genetic material at random place, genome editing allows the precise manipulation of DNA at a specific location. Zinc Finger Nucleases (ZFNs), Transcription Activator like Effector Nucleases (TALENs), Clustered Regularly Interspresed Short Palindromic repeats (CRISPR/Cas system) and meganucleases (recombinases) are the prime tools for editing an organism’s genome. Genome editing tools have an advantage to selectively delete or to integrate specific genes at specific loci. Use of recombinases for specifying site has further reduced time to integrate genes site specifically. Site specific gene stacking by the use of recombinases coupled with ZFNs, TALENs, or CRISPR/Cas genes have paved new pathways to target genes site specifically and to improve germplasm in lesser time than conventional breeding approaches.

关键词： CRISPR/Cas Gene Stacking Recombinases TALENs ZFNs

The Tale of Cotton Plant: From Wild Type to Domestication, Leading to Its Improvement by Genetic Transformation

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American Journal of Molecular Biology 2020年第2期10卷 91-127页

作者： Sabin Aslam sultan habibullah k.an Aftab Ahmed Abhaya M. Dandekar Center of Agricultural Biochemistry and Biotechnology University of Agriculture Faisalabad Pakistan Department of Plant Sciences University of California Davis CA USA Center of Advanced Studies in Agriculture and Food Security University of Agriculture Faisalabad Pakistan

Cotton is considered as a major cash crop of the world. It earns huge foreign exchange by its valuable products;fiber, lint, cotton seed oil, hull and a lot more. Being an important fiber crop, it earns huge foreign exchange by contributing to textile and seed oil industry. This review summarizes cotton biology, its diversity and domestication, genome assembly, constraints in its production and methods to improve cotton plant to fulfill the need of textile and oil industry. But cotton is facing enormous biotic and abiotic stresses with insect pests being most prominent. Massive destruction caused by insects needs to be controlled for maintaining fruitful cotton crop production. Conventional breeding approaches are limited to improving single trait and integrate stable genes within plant genome in approximately 7 - 8 years. Improved biotechnological procedures have paved new pathways to target genes specifically and improve cotton germplasm in lesser time than conventional breeding.

关键词： Cotton Colored Cotton Cotton Domestication Genetic Diversity Transformation

Enhancing cotton resilience to challenging climates through genetic modifications

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Genome-wide association analysis for stripe rust resistance in spring wheat(Triticum aestivum L.) germplasm

棉花研究(英文) 2024年第2期 196页

作者： AHMED Ali Ijaz k.an Azeem Iqbal NEGM Mohamed A.M. IQBAL Rida AZHAR Muhammad Tehseen k.an sultan habibullah RANA Iqrar Ahmad

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Journal of Integrative Agriculture 2020年第8期19卷 2035-2043页

作者： Sher MUHAMMAD Muhammad SAJJAD sultan habibullah k.an Muhammad SHAHID Muhammad ZUBAIR Faisal Saeed AWAN Azeem iqbal k.an Muhammad Salman MUBARAk Ayesha TAHIR Muhammad UMER Rumana kEYANI Muhammad InamAFZAL Irfan MANZOOR Javed Iqbal WATTOO Aziz-ur REHMAN Department of Bioinformatics and Biotechnology GC UniversityFaisalabad 38090Pakistan Department of Biosciences COMSATS University Islamabad(CUI)Islamabad 45550Pakistan Centre of Agricultural Biochemistry and Biotechnology(CABB) University of AgricultureFaisalabad 38000Pakistan Department of Plant Breeding and Genetics University of AgricultureFaisalabad 38000Pakistan Department of Biotechnology Faculty of Life SciencesUniversity of Central PunjabLahore 54000Pakistan Wheat Research Institute Ayub Agricultural Research Institute(AARI)Faisalabad 38950Pakistan

Stripe rust is a continuous threat to wheat crop all over the *** causes considerable yield losses in wheat crop every *** deployment of adult plant resistance(APR)genes in newly developing wheat cultivars is the most judicious strategy to combat this ***,we dissected the genetics underpinning stripe rust resistance in Pakistani wheat *** association panel of 94 spring wheat genotypes was phenotyped for two years to score the infestation of stripe rust on each accession and was scanned with 203 polymorphic *** on D’measure,linkage disequilibrium(LD)exhibited between loci distant up to 45 c ***-trait associations(MTAs)were determined using mixed linear model(MLM).Total 31 quantitative trait loci(QTLs)were observed on all 21 wheat *** QTLs were newly discovered as well as 19 QTLs and 35 previously reported Yr genes were validated in Pakistani wheat *** major QTLs were ***.2 AL and ***.3 BS(PVE,11.9%).Dissection of genes from the newly observed QTLs can provide new APR genes to improve genetic resources for APR resistance in wheat crop.

关键词： wheat Puccinia striiformis LD GWAS MTA PCoA

Genome editing in cotton:challenges and opportunities

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Journal of Cotton Research 2023年第1期6卷 60-80页

作者： k.an Zulqurnain k.an sultan habibullah AHMED Aftab IQBAL Muhammad Umar MUBARIk Muhammad Salman GHOURI Muhammad Zubair AHMAD Furqan YASEEN Saba ALI Zulfiqar k.an Asif Ali AZHAR Muhammad Tehseen Institute of Plant Breeding and Biotechnology MNS University of AgricultureMultan60000Pakistan Cotton Biotechnology Lab Center for Advanced StudiesUniversity of AgricultureFaisalabad38040Pakistan Center for Agricultural Biochemistry and Biotechnology University of AgricultureFaisalabad38040Pakistan Department of Biochemistry University of AgricultureFaisalabad38040Pakistan Better Cotton Initiatives LahorePakistan Department of Biotechnology University of NarowalNarowalPakistan Departmen of Plant Breeding and Genetics University of AgricultureFaisalabad38040Pakistan School of Agriculture Sciences Zhengzhou UniversityZhengzhou450000China

Cotton has enormous economic potential providing high-quality protein,oil,and fibre.A large increase in cotton output is necessary due to the world’s changing climate and constantly expanding human *** the past,conventional breeding techniques were used to introduce genes into superior cotton cultivars to increase production and to improve *** disadvantages of traditional breeding techniques are their time-consuming,reliance on genetic differences that are already present,and considerable *** accomplish goals in a short amount of time,contemporary plant breeding techniques,in particular modern genome editing technologies(GETs),can be *** crop improvement initiatives have made use of GETs,such as zinc-finger nucleases,transcription-activator-like effector nucleases,clustered regularly interspaced palindromic repeats(CRISPR),and CRISPR-associated proteins systems(CRISPR/Cas)-based *** CRISPR/Cas system has a lot of potential because it combines three qualities that other GETs lack:simplicity,competence,and *** CRISPR/Cas mechanism can be used to improve cotton tolerance to biotic and abiotic stresses,alter gene expression,and stack genes for critical features with little possibility of *** transgene clean strategy improves CRISPR acceptability addressing regulatory issues associated with the genetically modified organisms(GMOs).The research opportunities for using the CRISPR/Cas system to address biotic and abiotic stresses,fibre quality,plant architecture and blooming,epigenetic changes,and gene stacking for commercially significant traits are highlighted in this ***,challenges to use of CRISPR technology in cotton and its potential for the future are covered in detail.

关键词： ZFNs TALENs CRISPR/Cas9 Cotton Genetic improvement

Genome Editing Tools: Need of the Current Era

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