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003			EG-GICUC
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008			260411s2025 ua a|||frm||| 000 0 eng d
040			_aEG-GICUC _beng _cEG-GICUC _dEG-GICUC _erda
041	0		_aeng _beng _bara
049			_aDeposit
082	0	4	_a633.11
092			_a633.11 _221
097			_aM.Sc
099			_aCai01.07.10.M.Sc.2025.Al.G
100	0		_aAlaa Youssef Salah Youssef, _epreparation.
245	1	0	_aGenetic studies on wheat tolerance to yellow rust / _cby Alaa Youssef Salah Youssef ; Supervisors Dr. Mohamed Salah EL Soda, Dr. Neama Hussein Osman, Dr. Atef Abdel Fatah Mohamed Shahin.
246	1	5	_aدراسات وراثية علي تحمل نبات القمح للصدأ الاصفر
264		0	_c2025.
300			_a138 pages : _billustrations ; _c25 cm. + _eCD.
336			_atext _2rda content
337			_aUnmediated _2rdamedia
338			_avolume _2rdacarrier
502			_aThesis (M.Sc)-Cairo University, 2025.
504			_aBibliography: pages 114-138.
520		3	_aThis study was conducted from 2019 to 2020 at Merchouch (Morocco) and Izmir (Turkey), and from 2022 to 2023 at Sakha and Sids (Egypt), to investigate the genetic variability of stripe rust resistance in spring bread wheat. Stripe rust, caused by Puccinia striiformis f. sp. tritici, is a major biotic stress affecting wheat (Triticum aestivum) production worldwide. Identifying resistant wheat genotypes and their associated genomic regions is crucial for breeding programs aimed at improving stripe rust resistance. In this study, a panel of 154 spring bread wheat genotypes from the International Center for Agricultural Research in the Dry Areas (ICARDA) was evaluated across the four locations. Disease severity was assessed under natural field infection at the adult plant stage using the coefficient of infection (CI) as a quantitative measure of resistance. Genomic DNA was genotyped using 17,692 high- quality single-nucleotide polymorphism (SNP) markers, and genome-wide association studies (GWAS) were performed to identify significant marker– trait associations (MTAs) related to stripe rust tolerance. The mixed linear model (MLM), accounting for population structure and relatedness, was applied to each environment. A total of 136 significant MTAs were identified (−log10 (p) > 3.0), with the strongest associations located on chromosomes 2A, 3B, 4A, 5B, and 7A. Several MTAs were found near known resistance genes, including Yr18 and Yr57, while others appeared to represent novel loci. These findings highlight the polygenic nature of stripe rust tolerance in wheat and the influence of environmental variation on tolerance expression. The results provide valuable insights into the genetic architecture of tolerance and offer potential targets for marker-assisted breeding.
520		3	_aأُجريت هذه الدراسة خلال عامي 2019–2020 في مرشوش (المغرب) وإزمير (تركيا)، وخلال عامي 2022–2023 في سخا وسدس (مصر)، بهدف دراسة التباين الوراثي لمقاومة صدأ الأوراق المخططة في قمح الخبز الربيعي. يُعد صدأ الأوراق المخططة، المتسبِّب عن فطر Puccinia striiformis f. sp. tritici، من أهم عوامل الإجهاد الحيوي التي تؤثر في إنتاجية القمح (Triticum aestivum) عالمياً. ولذلك يُعد تحديد الطرز الوراثية المقاومة ومناطق الجينوم المرتبطة بها أمراً بالغ الأهمية لبرامج التربية الهادفة إلى تحسين مقاومة القمح لهذا المسبب المرضي.في هذه الدراسة، جرى تقييم مجموعة مكونة من 154 طرازاً وراثياً من قمح الخبز الربيعي التابعة للمركز الدولي للبحوث الزراعية في المناطق الجافة (إيكاردا) عبر المواقع الأربعة.
530			_aIssues also as CD.
546			_aText in English and abstract in Arabic & English.
650		0	_aDisease ‪Wheat ‪
650		0	_aأمراض القمح
653		1	_aWheat _aStripe rust _aGWAS _aMarker trait associations _aالقمح _aالصدأ المخطط
700	0		_aMohamed Salah EL Soda _ethesis advisor.
700	0		_aNeama Hussein Osman _ethesis advisor.
700	0		_aAtef Abdel Fatah Mohamed Shahin _ethesis advisor.
900			_b01-01-2025 _cMohamed Salah EL Soda _cNeama Hussein Osman _cAtef Abdel Fatah Mohamed Shahin _dMohamed Abd El-Salam Rashed _dReda El-Wany A. Moghaieb _UCairo University _FFaculty of Agriculture _DDepartment of Genetics
905			_aShimaa _eEman Ghareb
942			_2ddc _cTH _e21 _n0
999			_c179400