Abstract
A major mechanism of abortive interspecific crosses inAvena appears to be well explained by a hypothesis of polar-nuclei activation (Nishiyama and Yabuno, 1978, 1979). Under the hypothesis, activating value (AV) or response value (RV) of the six following species was estimated, 0.45 being assigned toA. clauda (2x), 0.8 toA. canariensis (2x) andA. prostrata (2x), 0.95 toA. damacena (2x), 1.4 toA. murphyi (4x) and 2.7 toA. byzantina (6x). AV and RV represent the intensity of the mutual reaction between the male and female gametes, respectively, in fertilization. Next the degree of activation of the two polar nuclei by one male nucleus which produce the first endosperm nucleus was shown by the activation index (AI) computed as AV/2RV×100(%). The AI showed a wide range of 7% to 338% in 37 interspecific crosses, the six species being crossed with each other or with some tester species. The pattern of relationship between the crossability, including plumpness, germination and others of hybrid seeds, and the AI% was found to completely agree with that expected from the standard cross-compatibility system inAvena (Fig. 1A, B). That is, compatible crosses occurred within a range of about 20% to 80% AI but incompatible crosses occurred beyond these limits.
References
Austin, C.R. 1965. Fertilization. C.L. Markert, ed., Foundation of Developmental Biology Series p. 1–145. Prentice-Hall, New Jersey.
Cooper, D.C. andR.A. Brink. 1940. Somatoplastic sterility as a cause of seed failure after interspecific hybridization. Genetics25: 593–617.
Guignard, L. 1899. Sur les anthérozoides et la double copulation chez les végétaux angiospermes. Compt. Rend. Acad. Sci., Paris128: 864–871.
Johnston, S.A., T.P.M. den Nijis, S.J. Peloquin andR.E. Hanneman, Jr. 1980. The significance of genic balance to endosperm development in interspecific crosses. Theor. Appl. Genet.57: 5–9.
— andR.E. Hanneman, Jr. 1980. Support of the endosperm balance number hypothesis utilizing tuber-bearingSolanum species. Amer. Potato J.57: 7–14.
Kihara, H. andI. Nishiyama. 1932. Different compatibility in reciprocal crosses ofAvena, with special reference to tetraploid hybrids between hexaploid and diploid species. Jap. J. Bot.6: 245–305.
Müntzing, A. 1933. Hybrid incompatibility and origin of polyploidy. Hereditas18: 33–56.
Navashin, S. 1898. Resultate einer Revision der Befruchtungsvorgänge beiLilium martagon undFritillaria tenella. Bull. Acad. St. Petersburg9, No. 4.
Nishiyama, I. 1935. Experimentelle embryologische Studien an tetraploidenAvena-Bastarden (2x×6x). Bull. Sericulture and Silk-Industry8: 378–382 (Japanisch mit deutschen Zusammenfassung).
—. 1952. Polyploid-studies in the Brassiceae, I. The seed development in reciprocal crosses between diploid and tetraploidRaphanus. Memoirs Res. Inst. Food Sci. Kyoto Univ.3: 1–7.
— 1970. Four types of flowering time inAvena. Jap. J. Genet.45: 399–409.
— 1979a. Suggestive information on an interspecific cross-incompatibility system inTriticum. Wheat Information Service49: 32–34.
— 1979b. An interspecific cross-incompatibility system in diploid and tetraploidAegilops. Wheat Information Service50: 61–64.
— 1981.Triticum-Aegilops cross-incompatibility system based on the polar-nuclei activation hypothesis. Boletim Soci. Broteriana53: 813–822.
Nishiyama, I. 1984. Polar-nuclei activation hypothesis on the abortive interspecific hybridization. Intern. Symp. New Genet. Appro. Crop Improv. Karachi, 1982, in press.
—, andM. Iizuka. 1952. Successful hybridization by means of X-rayed pollen in otherwise incompatible crosses. Bull. Inst. Food Sci. Kyoto Univ.8: 81–89 (Japanese with English summary).
— andY. Inamori. 1953. Polyploidy studies in the Brassicese, III. Hybridization between diploid species (2n=20) and their autotetraploids. Memoirs Res. Inst. Food Sci. Kyoto Univ.5: 1–13.
— andN. Inomata. 1966. Embryological studies on cross-incompatibility between 2x and 4x inBrassica. Jap. J. Genet.41: 27–42.
— andH. Karasawa. 1954. Somatoplastic sterility in reciprocal crosses between 2x- and 4x-plants inCapsicum. Jap. J. Breeding3: 36–40 (Japanese with English summary).
—,M. Shimotsuma andT. Yabuno. 1952. A comparative study on the development of polyploid seeds in watermelon. Seiken Zihô5: 110–118 (Japanese with English summary).
— andS. Uematsu. 1967. Radiobiological studies in plants, XIII. Embryogenesis following X-irradiation of pollen inLycopersicum pimpinellifolium. Radiation Bot.7: 481–489.
— andT. Yabuno. 1978. Causal relationships between the polar nuclei in double fertilization and interspecific cross-incompatibility inAvena. Cytologia43: 453–466.
——. 1979. Triple fusion of the primary endosperm nucleus as a cause of interspecific cross-incompatibility inAvena. Euphytica28: 57–65.
——. 1983. A mechanism of the alteration of crossability in artificialAvena polyploids. Jap. J. Genet.58: 51–57.
Ohtsuka, I. 1980. D genome chromosome on the compatible relation between wheat genomes andAigilops squarrosa cytoplasm. Seiken Zihô29: 18–39 (Japanese with English summary).
Pienaar, R. De V. 1973. Methods to improve the gene flow from rye and wheat toTriticale. E. R. Sears and L.M.S. Sears, ed., Proc. 4th Intern. Wheat Genet. Symp. p. 253–258.
Thomas, H. 1970. Chromosome relationship between the cultivated oat,Avena sativa (6x) andA. ventricosa (2x). Can. J. Genet. Cytol.12: 36–43.
Sachet, M.H. 1948. Fertilization in six incompatible species crosses ofDatura. Amer. J. Bot.35: 302–309.
Valentine, D.H. andR.S.J. Woodell. 1963. Studies in British Primulas, X. Seed incompatibility in intraspecific and interspecific crosses at diploid and tetraploid levels. New Phytol.62: 125–143.
Watkins, A.E. 1932. Hybrid sterility and incompatibility. J. Genet.25: 125–162.
Wilson, D.B. 1925. The Cell in Development and Heredity. 3 ed. Macmillan Co., New York.
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Nishiyama, I. Interspecific cross-incompatibility system in the genusAvena . Bot Mag Tokyo 97, 219–231 (1984). https://doi.org/10.1007/BF02488695
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DOI: https://doi.org/10.1007/BF02488695