作 者 ：Sun Gen-lou, Yang Jun-liang, Yen Chi
期 刊 ：植物分类学报 1993年 5期
Keywords:
Abstract:
Intergeneric crosses were made betweem Psathyrostachys huashanica
(2n=14, NN)and two Roegneria species, namely, R. ciliaris (2n=28, SSYY),
and R. tsukushiensis (2n=42, SSHHYY). Two combinations of P. huashanica
crossed with R. ciliaris and R. tsukushiensis produced adult hybrid plants. Al-
though completely sterile, the hybrid plants developed rather vigorously, and were
morphologically intermediate between the two parents.Two spikelets per node in
part were observed in hybrids, which evidently came from P. huashanica. The
chromosome configurations of R. ciliaris × P. huashanica and R. tsukushiensis × P.
huashanica were 20.73 I+0.318 II, 24.80 I+1.578 II+0. 012 III, respectively.
Polypolar division was found at anaphase I in meiosis of two hybrids. Abnormal
meiosis in two hybrids was observed. The chromosome pairing indicates that there
is only a little chromosome homoeology between “N” genome of P. huashanica
and “S”, “Y” or “H” genomes of R. ciliaris and R. tsukushiensis.