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A new Chinese species of Psathyrostachys (Poaceae) with notes on its karyotype
Author(s) -
Baden Claus,
LindeLaursen Ib,
Dewey Douglas R.
Publication year - 1990
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/j.1756-1051.1990.tb00535.x
Subject(s) - biology , karyotype , chiasma , meiosis , botany , interspecific hybrids , chromosome , hybrid , interspecific competition , poaceae , genetics , gene
The new species Psathyrostachys stoloniformis native to China is described. The karyotype was investigated by C‐, N‐, and Ag‐banding. The new species has 2n = 2x = 14, including 8 metacentric and 6 SAT‐chromosomes with minute satellites, distributed either on 3 or on 4 chromosome pairs. The C‐banding pattern comprises from one to six conspicuous and from zero to three very small bands per chromosome. Often two bands placed close together appear as one large band. The karyotype suggests that P. stoloniformis is closely related to P. juncea. N‐banding produced very weak or no bands. Meiotic analyses of interspecific hybrids revealed a high chiasma frequency indicating that P. stoloniformis has the same basic genome (N) as P. huashanica , and P. fragilis.