Summary
Interspecific hybrids between New Zealand decaploid species of Cortaderia (Section Bifida) are fertile and share a common gene(s) for control of male sterility, the determinant of their gynodioecious breeding system. The interspecific hybrid between the two sexually reproducing species of Section Cortaderia is F1 fertile, but shows some slight degeneration in later generations especially through lethal albinism. They share a common gene(s) for male sterility control.
Experimental intersectional hybrids are nonoploid and sterile. F1 C. araucana × C. toetoe consisted of a family of solely female plants with the androecial morphology of the female parent. Such hybrids share the two main characteristics of the several apomictic taxa in Section Cortaderia; intersection hybridisation is a possible pathway towards the evolution of solely female taxa. F1 C. toetoe × C. selloana segregated plants of both sex-forms. Different male sterility genes, or alleles, occur in the two Sections, and ratios of hermaphrodite to female plants are intersectionally discrete.
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Charlesworth, D. 1981. A further study of the problem of the maintenance of females in gynodioecious species. Heredity, 46, 27–39.
Charlesworth, D, and Ganders, F R. 1979. The population genetics of gynodioecy with cytoplasmic-genic male-sterility. Heredity, 43, 213–218.
Connor, H E. 1965a. Breeding systems in New Zealand grasses. V. Naturalized species of Cortaderia. NZ J Botany, 3, 17–23.
Connor, H E. 1965b. Breeding systems in New Zealand grasses. VI. Control of gynodioecism in Cortaderia richardii (Endl.) Zotov. NZ J Botany, 3, 233–242.
Connor, H E. 1974. Breeding Systems of Cortaderia (Gramineae). Evolution, 27, 663–678.
Connor, H E. 1979. Breeding Systems in the grasses: a survey. NZ J Botany, 17, 547–574.
Connor, H E. 1981. Evolution of reproductive systems in the Gramineae. Ann Miss Bot Gard, 68, 48–78.
Connor, H E, and Edgar, E. 1974. Names and types in Cortaderia Stapf (Gramineae). Taxon, 23, 596–605.
Connor, H E, and Purdie, A W. 1976. Inheritance of triterpene methyl ethers in Cortaderia (Gramineae). Phytochemistry, 15, 1937–1939.
Costas-Lippmann, M. 1979. Embryogeny of Cortaderia selloana and C.jubata (Gramineae). Bot Gaz, 140, 393–397.
Delannay, X, Gouyon, P H, and Valdeyron, G. 1981. Mathematical study of the evolution of gynodioecy with cytoplasmic inheritance under the effect of a nuclear restorer gene. Genetics, 99, 169–181.
Edwardson, J R. 1970. Cytoplasmic male sterility. Bot Rev, 36, 341–420.
Fagerlind, F. 1940. Zytologie und Gametophytenbildung in der Gattung Wikstroemeria. Hereditas, 26, 23–50.
Gustafsson, A. 1946–47. Apomixis in Higher Plants. Gleerup, Lund.
Lloyd, D G. 1976. The transmission of genes via pollen and ovules in gynodioecious Angiosperme. Theoretical Population Biol, 9, 299–316.
Philipson, M N. 1978. Apomixis in Cortaderia jubata (Gramineae). NZ J Botany, 16, 45–59.
Stebbins, G L. 1932. Cytology of Antennaria. II. Parthenogenetic Species. Bot Gaz, 44, 322–344.
Westergaard, M. 1958. The mechanism of sex determination in dioecious flowering plants. Adv Gen, 9, 217–281.
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Connor, H. Cortaderia (Gramineae): Interspecific hybrids and the breeding systems. Heredity 51, 395–403 (1983). https://doi.org/10.1038/hdy.1983.44
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DOI: https://doi.org/10.1038/hdy.1983.44