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

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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

Abstract

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

ZHANG Xin-Quan, YANG Jun-Liang, YEN Chi, ZHENG You-Liang, WU Bi-Hua. Biosystematic studies of Kengyilia melanthera and K. kokonorica (Poaceae: Triticeae)[J]. .

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

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