Chromosomal Location of Powdery Mildew Resistance Genes and Cytogenetic Analysis of Meiosis in Common Wheat Cultivar Meri

Abstract

Common wheat cv. Meri was crossed to a set of 21 Chinese Spring monosomic lines to characterize resistance to powdery mildew and to determine the chromosomal location of the gene(s). Monosomic F1 plants were allowed to self-pollinate and to produce F2 seeds. Seedlings of F2 and F3 plants and their parents were inoculated with isolates Ns 2 and 9 of Erysiphe graminis f. sp. tritici. Analysis of obtained data revealed that one major dominant gene conferring resistance is located on chromosome 1B of cv. Meri. The new gene is designated by symbol Pm28. On the basis of the trivalent configuration frequency (without univalent) at the 1st metaphase of meiosis it was found that two reciprocal translocations involving chromosomes 2A/5A and 5B/5D differentiate cv. Meri from cv. Chinese Spring. In the F1 monosomic hybrids, genes causing a decrease in pairing are found on chromosomes 4D and 6D, and genes enhancing pairing--on chromosomes 3A and 7B.

Inheritance and Chromosomal Assignment of Powdery Mildew Resistance Genes in Two Winter Wheat Germplasm Lines

“…Monogenic resistance is mainly via a hypersensitive foliar reaction involving major Pm genes in a gene‐for‐gene interaction (Bennett, 1984; Chen and Chelkowski, 1999; Hsam and Zeller, 2002). Thirty major gene loci have been identified to date in common wheat (McIntosh et al, 1998; Rong et al, 2000; Järve et al, 2000; Peusha et al, 2000; Zeller et al, 2002; Liu et al, 2002; Hsam et al, 2003; Singrun et al, 2003). Horizontal or quantitative resistance has been identified (Shaner, 1973; Griffey and Das, 1994; Chantret et al, 2001; Liu et al, 2001) and adult plants with this form of resistance exhibit a decrease in disease intensity compared with the fully susceptible lines.…”

Genetic analysis of durable powdery mildew resistance in a common wheat line

“…The most economical and enviromental way for powdery mildew control remains development of resistant cultivars. Up to now 28 gene loci ( Pm ) for resistance against powdery mildew have been assigned to particular wheat chromosomes (M cIntosh et al 1998; J ärve et al 2000; P eusha et al 2000). In order to improve powdery mildew resistance, attempts have been made to pyramide several Pm genes in one cultivar, nevertheless, no durable resistance has been provided (B rown et al 1997).…”

Powdery mildew resistance of Nordic spring bread wheat accessions from the collection of the Vavilov Institute (VIR)

“…Устойчивость к патогену некоторых скандинавских сортов была изучена методами фитопатологического и гибридологического анализа (Hsam et al, 2002;Hysing et al, 2008;McIntosh et al, 2003McIntosh et al, , 2017Peusha et al, 1996Peusha et al, , 2000Peusha et al, , 2008Lebedeva et al, 2018). В этих работах приводятся данные о генах устойчивости к мучнистой росе у сортов из Швеции: 'Ring' (к-44779) -Pm1a, Pm2, Pm9; 'Pompe' (к-46563) -Pm1a, Pm2,Pm9;Pm2,Pm9;Pm2,Pm4b,Pm9; Pm2, Pm4b, Pm6;'Sonett' (к-52333) -Mld;'Sappo' (к-52362) -Pm1a, Pm2, Pm4b, Pm6;'Walter' (к-54585) -Pm1, Pm2, Pm4b;'Timmo' (к-57073) -Pm1, Pm2, Pm4b, Pm6; 'Kadett' (к-57724) -Pm3d, Pm4b; 'Saffran' (к-57725) -Pm1a, Pm2, Pm8, Pm9; 'Sunnan' (к-58177) -Pm1, Pm2, Pm6; 'William' (к-58758) -Pm1, Pm4b, Pm6; 'Nemares' (к-61174) -Pm1, Pm2; 'Canon' (к-61222) -Pm1, Pm2, Pm6; 'Dragon' (к-61515) -Pm1, Pm4b, Pm5, Pm6; 'Tjalve' (к-61516) -Pm3d, Pm4; 'SW Estrad' (к-64435) -Pm3d; 'SW Vinjett' (к-64436) -Pm3d; 'Zebra' (к-64707) -Pm3d; 'Lavett' (к-66095) -Pm3d, Pm4b; 'Polkka' (к-66715) -Pm3f; у сортов из Норвегии: 'As II' (к-44701) -Pm1a; 'Runar' (к-57055) -Pm4b; 'Reno' (к-57056) -Pm4b; 'Tautra' (к-57067) -Pm5, Pm6; 'Bastian' (к-66441) -Pm3d; у сортов из Финляндии: 'Ulla' (к-54216) -Pm1; 'Tapio' (к-57059) -Pm3d; 'Manu' (к-66029) -Pm4b; у сорта из Дании: 'Vitus' (к-58760) -Pm3d.…”