pentaploid, a. and n. Biol.
(ˈpɛntəplɔɪd)
[f. penta- + -ploid.]
(Made up of somatic cells) containing five sets of chromosomes. Also as n., a pentaploid organism.
| 1921 Ann. Bot. XXXV. 185 Among the roses examined were diploid, tetraploid, pentaploid, and hexaploid forms. 1921 [see hexaploid a. and n.]. 1946 Nature 19 Oct. 536/1 The cytology of species of Magnolia has proved the existence of diploids.., tetraploids.., and pentaploids. 1968 Canad. Jrnl. Genetics & Cytol. X. 910 Of the progeny obtained by backcrossing the pentaploid hybrid (AABBD) from the synthetic wheat to its tetraploid T[riticum] durum parent as male 49% had 28 chromosomes and 28% had 29 or 30. |