Person: Ammar, K.
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Ammar
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K.
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Ammar, K.
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0000-0003-2436-920017 results
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Now showing 1 - 10 of 17
- QTL mapping of seedling and field resistance to stem rust in DAKIYE/Reichenbachii durum wheat population(Public Library of Science, 2022) Megerssa, S.H.; Ammar, K.; Acevedo, M.; Bergstrom, G.; Dreisigacker, S.; Randhawa, M.S.; Brown-Guedira, G.; Ward, B.; Sorrells, M.E.
Publication - Deciphering resistance to Zymoseptoria tritici in the Tunisian durum wheat landrace accession ‘Agili39’(BioMed Central, 2022) Ferjaoui, S.; Aouini, L.; Ben Slimane, R.; Ammar, K.; Dreisigacker, S.; Schouten, H.J.; Sapkota, S.; Bahri, B.; Ben M’Barek, S.; Visser, R.G.F.; Kema, G.H.J.; Hamza, S.
Publication - Harnessing translational research in wheat for climate resilience(Oxford University Press, 2021) Reynolds, M.P.; Lewis, J.; Ammar, K.; Basnet, B.R.; Crespo Herrera, L.A.; Crossa, J.; Dhugga, K.; Dreisigacker, S.; Juliana, P.; Karwat, H.; Kishii, M.; Krause, M.; Langridge, P.; Lashkari, A.; Mondal, S.; Payne, T.S.; Pequeno, D.N.L.; Pinto Espinosa, F.; Sansaloni, C.; Schulthess, U.; Singh, R.P.; Sonder, K.; Sukumaran, S.; Wei Xiong; Braun, H.J.
Publication - The effect of photoperiod genes and flowering time on yield and yield stability in durum wheat(MDPI, 2020) Arjona Rodríguez, J.M.; Villegas, D.; Ammar, K.; Dreisigacker, S.; Alfaro, C.; Royo, C.
Publication - Agronomic performance of durum wheat landraces and modern cultivars and its association with genotypic variation in vernalization response (Vrn-1) and photoperiod sensitivity (Ppd-1) genes(Elsevier, 2020) Royo, C.; Dreisigacker, S.; Ammar, K.; Villegas, D.
Publication - Allelic variation at the vernalization response (Vrn-1) and photoperiod sensitivity (Ppd-1) genes and their association with the development of durum wheat landraces and modern cultivars(Frontiers, 2020) Royo, C.; Dreisigacker, S.; Soriano, J.M.; Lopes, M.; Ammar, K.; Villegas, D.
Publication - Effect of allele combinations at Ppd-1 loci on durum wheat grain filling at contrasting latitudes(Wiley, 2020) Arjona Rodríguez, J.M.; Royo, C.; Dreisigacker, S.; Ammar, K.; Subira, J.; Villegas, D.
Publication - Mapping of genetic loci conferring resistance to leaf rust from three globally resistant durum wheat sources(Frontiers, 2019) Kthiri, D.; Loladze, A.; N’Diaye, A.; Nilsen, K.; Walkowiak, S.; Dreisigacker, S.; Ammar, K.; Pozniak, C.Genetic resistance in the host plant is the most economical and environmentally friendly strategy for controlling wheat leaf rust, caused by Puccinia triticina Eriks. The durum wheat lines Gaza (Middle East), Arnacoris (France) and Saragolla (Italy) express high levels of resistance to the Mexican races of P. triticina. Three recombinant inbred line (RIL) populations, derived from crosses of each of these resistance sources to the susceptible line ATRED #2, were evaluated for leaf rust reactions at CIMMYT’s leaf rust nurseries in Mexico. Genetic analyses of host reactions suggested oligogenic control of resistance in all populations. The F8 RILs from each cross were genotyped using the Illumina iSelect 90K array, and high-density genetic maps were constructed for each population. Using composite interval mapping, a total of seven quantitative trait loci (QTL) that provide resistance to leaf rust were identified. Two QTL designated as QLr.usw-6BS and QLr.usw-6BL were identified on chromosome 6B in Gaza, which explained up to 78.5% and 21.3% of the observed leaf rust severity variance, respectively. A major QTL designated as QLr.usw-7BL was detected on the long arm of chromosome 7B in Arnacoris, which accounted for up to 65.9% of the disease severity variance. Arnacoris also carried a minor QTL on chromosome 1BL, designated as QLr.usw1BL.1 that explained up to 17.7% of the phenotypic variance. Three QTL conferred leaf rust resistance in Saragolla, namely QLr.usw-2BS, QLr.usw-3B, and QLr.usw-1BL.2, which accounted for up to 42.3, 9.4, and 7.1% of the phenotypic variance, respectively. Markers flanking each QTL were physically mapped against the durum wheat reference sequence and candidate genes involved in disease resistance were identified within the QTL intervals. The QTL identified in this study and their closely linked markers are useful resources for gene pyramiding and breeding for durable leaf rust resistance in durum wheat.
Publication - Wheat quality improvement at CIMMYT(CIMMYT, 2018) Guzman, C.; Mondal, S.; Velu, G.; Huerta-Espino, J.; Crespo Herrera, L.A.; Dreisigacker, S.; Basnet, B.R.; Molero, G.; Piñera Chavez, F.J; Reynolds, M.P.; Morgounov, A.; Ammar, K.; Singh, R.P.
Publication - Mejoramiento de la calidad de trigo(CIMMYT, 2018) Guzman, C.; Mondal, S.; Velu, G.; Juliana, P.; Huerta-Espino, J.; Crespo Herrera, L.A.; Dreisigacker, S.; Basnet, B.R.; Molero, G.; Piñera Chavez, F.J; Reynolds, M.P.; Kishii, M.; Crossa, J.; Morgounov, A.; Ammar, K.; Singh, R.P.
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