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APOGAMY AND SOMATIC RESTITUTION IN THE FERN CERATOPTERIS
Author(s) -
Hickok Leslie G.
Publication year - 1979
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1979.tb06324.x
Subject(s) - biology , fern , sporophyte , gametophyte , apomixis , botany , selfing , ploidy , frond , spore , sporangium , heterokaryon , mutant , pteridium aquilinum , genetics , pollen , population , gene , demography , sociology
A mutant stock of the fern Ceratopteris has been derived from an inbreeding study following an interspecific hybridization between two diploid species. The mutant is characterized by gametophytes that produce non‐functional spermatozoids and are incapable of selfing. Sporophytes develop apogamously from the mutant gametophytes and, although they are initially haploid and sterile, portions of the fronds later become doubled somatically and behave like tissues of sexually derived homozygous sporophytes. The mutant segregates from sporophytes in a 1:1 ratio when crosses are made with wild type gametophytes. Certain aspects of the behavior are similar to those seen in some naturally occurring apomictic ferns.