DNA markers linked to the R(2) rust resistance gene in sunflower (Helianthus annuus L.) facilitate anticipatory breeding for this disease variant.

Pre-emptive breeding for host disease resistance is an effective strategy for combating and managing devastating incursions of plant pathogens. Comprehensive, long-term studies have revealed that virulence to the R (2) sunflower (Helianthus annuus L.) rust resistance gene in the line MC29 does not exist in the Australian rust (Puccinia helianthi) population. We report in this study the identification of molecular markers linked to this gene. The three simple sequence repeat (SSR) markers ORS795, ORS882, and ORS938 were linked in coupling to the gene, while the SSR marker ORS333 was linked in repulsion. Reliable selection for homozygous-resistant individuals was efficient when the three markers, ORS795, ORS882, and ORS333, were used in combination. Phenotyping for this resistance gene is not possible in Australia without introducing a quarantinable race of the pathogen. Therefore, the availability of reliable and heritable DNA-based markers will enable the efficient deployment of this gene, permitting a more effective strategy for generating sustainable commercial cultivars containing this rust resistance gene.

Study of internal motions through N.Q.R. in 6-Chloropyridin-2-ol

Chlorine-35 n.q.r, has been observed for the first time in 6-chloropyridin-2-ol and its temperature dependence has been studied from 77 K to room temperature. The torsional frequencies and their temperature dependences have been calculated by using Bayer's theory with and without Tatsuzaki's modification.

Tombstone of David Benjamin; Strangriede Cemetery (R 84.7); Hannover Cemeteries Tombs

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Tombstone of H. Solomon; Strangriede Cemetery (R 83); Hannover Cemeteries Tombs

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Tombstone of Frederike Benjamin nee Salamon; Strangriede Cemetery (R 83); Hannover Cemeteries Tombs

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Tombstone of Herz Benjamin (Naftali); Strangriede Cemetery (R 83.12); Hannover Cemeteries Tombs

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Tombstone of Max Molling; Strangriede Cemetery (R 29.10); Hannover Cemeteries Tombs

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Tombstone of Marianne Benjamin nee Sussmann; Strangriede Cemetery (R 83.9); Hannover Cemeteries Tombs

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Tombstone of Arthur Molling; Strangriede Cemetery (R 26.05); Hannover Cemeteries Tombs

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Tombstones of Frederike Benjamin nee Salamon and her husband David Benjamin; Strangriede Cemetery (R 84.6 and R 84.7); Hannover Cemeteries; Tombs

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Tombstone of Jeanette Molling nee Benjamin; Strangriede Cemetery (R 26.06); Hannover Cemeteries Tombs

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Detail of tombstone of Arthur Molling; Strangriede Cemetery (R 26.05); Hannover Cemeteries Tombs

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Tombstones of Sophie Molling and Max Molling (center in shadow); Strangriede Cemetery (R 29.09 and R 29.10); Hannover Cemeteries Tombs

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Tombstones of Joseph Benjamin and Marianne Benjamin nee Sussmann; Strangriede Cemetery (R 83.8 and R 83.9); Hannover Cemeteries Tombs

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Tombstones of Lea Benjamin nee Levy and Herz Benjamin; Strangriede Cemetery (R 83.11 and R 83.12); Hannover Cemeteries Tombs

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