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青海仲彬草和黑药仲彬草的生物系统学研究

张新全,杨俊良,颜济,郑有良,伍碧华   

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1999-03-10 发布日期:1999-03-10
  • 通讯作者: 张新全

Biosystematic studies of Kengyilia melanthera and K. kokonorica (Poaceae: Triticeae)

ZHANG Xin-Quan, YANG Jun-Liang, YEN Chi, ZHENG You-Liang, WU Bi-Hua   

  • Received:1900-01-01 Revised:1900-01-01 Online:1999-03-10 Published:1999-03-10
  • Contact: ZHANG Xin-Quan

摘要:

黑药仲彬草Kengyilia melanthera(Keng)J.L. Yang,Yen et Baum和青海仲彬草K.kokonorica
(Keng)J.L.Yang,Yen et Baum是分布于我国西部的两种多年生六倍体植物。将其分别与鹅观草
Roegneria kamoji Ohwi(2n=42,StStHHYY)、糙毛仲彬草K.hirsuta(Keng)J.L. Yang,Yen et Baum
(2n=42,PPStStYY)进行了杂交;对亲本及杂种Fl代花粉母细胞减数分裂中期I染色体配对行为进行
了观察。杂种F1减数分裂染色体配对平均构型分别为:R.kamoji×K.melanthera,18.201+11.74
Ⅱ 十0.09Ⅲ十0.01V;K.hirsuta×K.melanthera,1.06Ⅰ十20.47Ⅱ;R.kamoji×K.kokonori-
ca,19.36Ⅰ十11.26Ⅱ十0.04Ⅲ;K.hirsuta×K.kokonorica,2.46Ⅰ十19.44Ⅱ 十0.14Ⅲ十0.06
Ⅳ。根据以上结果,并结合形态特征,将黑药仲彬草和青海仲彬草从鹅观草属拟冰草组Roegneria
sect.Paragropyron Keng中组合到仲彬草属Kengyilia Yen et Yang更为恰当,而不应划分到披碱草属E-
lymus L.或偃麦草属Elytrigia Desv.中。

关键词: 黑药仲彬草, 青海仲彬草, 属间杂种, 染色体配对, 染色体组分析

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.

Key words: Kengyilia melanthera, K. kokonorica, Intergeneric hybrids, Chromosomepairing: Genome analysis