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CYTOLOGICAL PROOF OF APOMIXIS IN CRATAEGUS (ROSACEAE)
Author(s) -
Muniyamma M.,
Phipps J. B.
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.tb06207.x
Subject(s) - apomixis , crataegus , biology , rosaceae , botany , ploidy , genetics , gene
An abundance of circumstantial evidence has led earlier workers to believe that apomixis was a common phenomenon in North American Crataegus . However, direct proof was lacking. In this paper, working with accessions of Crataegus pruinosa (Wendl.) K. Koch, sens. lat ., a common and rather variable species of eastern North America, we present cytological proof of apomixis. This paper demonstrates the existence of apospory and documents the development of the aposporous embryo sac. Pseudogamy is inferred.