作 者 ：ZHANG Xin-Quan, YANG Jun-Liang, YEN Chi, ZHENG You-Liang, WU Bi-Hua
期 刊 ：植物分类学报 1999年 2期
Keywords:
Abstract:
Kengyilia melanthera (Keng)J. L. Yang, Yen et Baum and K. kokonorica
(Keng)J. L. Yang, Yen et Baum are two hexaploid perennial grasses of the tribe Triticeae
native in west China. K. melanthera and K. kokonorica were hybridized with Roegneria
kamoji Ohwi(2n=42,StStHHYY) and K. hirsuta (Keng)J. L. Yang, Yen et Baum (2n
= 42, PPStStYY) respectively. Chromosome pairing behaviour at metaphase I in the par-
ents and hybrids was studied. Meiotic configurations were 18.20 Ⅰ + 11.74 Ⅱ + 0.09 Ⅲ
+ 0.01V for R. kamoji×K. melanthera, 1.06Ⅰ + 20.47 Ⅱ for K. hirsuta×K.
melanthera, 19.36Ⅰ + 11.26 Ⅱ + 0.04Ⅲ for R. kamoji×K. kokonorica, and2.46Ⅰ
+ 19.44Ⅱ + 0.14 Ⅲ + 0.06 Ⅳ for K. hirsuta×K. kokonorica. Considering chromo-
some pairing in the hybrids, as well as morphological characters, K. melanthera and K.
kokonorica should be grouped in Kengyilia Yen et J. L. Yang instead of being keeped in
Roegneria sect. Paragropyron Keng , or in Elymus L. or Elytrigia Desv.