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Chromosome number and karyotype of Phaenospermateae and Duthieeae (Poaceae), with reference to their systematic implications
Author(s) -
Zhang ZhongShuai,
Li LingLu,
Chen WenLi
Publication year - 2018
Publication title -
nordic journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.333
H-Index - 33
eISSN - 1756-1051
pISSN - 0107-055X
DOI - 10.1111/njb.01918
Subject(s) - biology , karyotype , chromosome , chromosome number , botany , phylogenetic tree , tribe , cytotaxonomy , poaceae , genetics , evolutionary biology , gene , sociology , anthropology
Recent molecular phylogenetic studies indicate that Phaenospermateae and Duthieeae are among the early diverging lineages of Pooideae and that they are closely related to each other. Here, we test this with cytotaxonomical data. The monotypic tribe Phaenospermateae, represented by Phaenosperma globosum , has a chromosome number of 2 n = 2 x = 24 and a fairly symmetric karyotype consisting of 22 median (m) and 2 submedian (sm) chromosomes varying in length between 1.8–3 μm. Duthieeae, represented by Duthiea brachypodium , Sinochasea trigyna , Stephanachne monandra and Stephanachne pappophorea , also share the chromosome number 2 n = 2 x = 24 and similar symmetric karyotypes with the chromosomes varying in length between 1.4–5 μm. Thus, the close relationship of Phaenospermateae and Duthieeae is corroborated.