Publication Date
1989
Description
Since tall fescue (Festuca arundinacea, Schreb.) is one of the temperate grass species which have good heat tolerance, it is mainly used in grasslands established throughout southwestern Japan where it is hot and humid in summer and mild in winter. The cultivars which have good adaptability to the Japanese condition mainly originated from European or North American populations. Mediterranean populations of tall fescue have good growth potential under the low temperature and short day conditions (Evans et al., 1973) and high levels of crown rust resistance (Wofford et al., 1982). But, the grass species distributed in Mediterranean area are known « summer dormancy». They are damaged heavily in the summer conditions, and their productivity and persistency are inferior to those of adapted cultivars in Japan. It was reported that the meiosis in the progenies of crosses between Mediterranean and European/American genotypes was irregular and their seed fertility was low (Evans et al., 1973; Hunt et al., 1981). This sterility barrier has disturbed to combine the desirable attribute of ecogeographic populations. But they suggested that some genes could be transferred from Mediterranean to American material by repeated backcrossing and/ or through the use of bridging cross. The objectives of this study were to 1) determine the variability of seed fertility. in single cross progenies between Mediterranean and adapted genotypes in Japan, 2) determine the expression of crown rust resistance in these genotypes.
Citation
Ueyama, Y and Sato, S, "Improvement of Season Growth and Resistance to Crown Rust of Tall Fescue Through Hybridization between Mediterranean Populations and Adapted Cultivars in Japan" (2025). IGC Proceedings (1989-2023). 44.
https://uknowledge.uky.edu/igc/1989/session3b/44
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Improvement of Season Growth and Resistance to Crown Rust of Tall Fescue Through Hybridization between Mediterranean Populations and Adapted Cultivars in Japan
Since tall fescue (Festuca arundinacea, Schreb.) is one of the temperate grass species which have good heat tolerance, it is mainly used in grasslands established throughout southwestern Japan where it is hot and humid in summer and mild in winter. The cultivars which have good adaptability to the Japanese condition mainly originated from European or North American populations. Mediterranean populations of tall fescue have good growth potential under the low temperature and short day conditions (Evans et al., 1973) and high levels of crown rust resistance (Wofford et al., 1982). But, the grass species distributed in Mediterranean area are known « summer dormancy». They are damaged heavily in the summer conditions, and their productivity and persistency are inferior to those of adapted cultivars in Japan. It was reported that the meiosis in the progenies of crosses between Mediterranean and European/American genotypes was irregular and their seed fertility was low (Evans et al., 1973; Hunt et al., 1981). This sterility barrier has disturbed to combine the desirable attribute of ecogeographic populations. But they suggested that some genes could be transferred from Mediterranean to American material by repeated backcrossing and/ or through the use of bridging cross. The objectives of this study were to 1) determine the variability of seed fertility. in single cross progenies between Mediterranean and adapted genotypes in Japan, 2) determine the expression of crown rust resistance in these genotypes.
