小麦族下Hystrix longearistata和Hystrix duthiei的生物系统学研究

中国科学院大学学报

小麦族下Hystrix longearistata和Hystrix duthiei的生物系统学研究

周永红,杨俊良,颜济,郑有良

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1999-07-10 发布日期:1999-07-10
通讯作者: 周永红

Biosystematic studies on Hystrix longearistata from Japan and Hystrix duthiei from China (Poaceae: Triticeae)

ZHOU Yong-Hong, YANG Jun-Liang, YAN Ji, ZHENG You-Liang

Received:1900-01-01 Revised:1900-01-01 Online:1999-07-10 Published:1999-07-10
Contact: ZHOU Yong-Hong

摘要/Abstract

摘要：

对Hystrix duthiei、H．longearistata和它们的人工种间杂种花粉母细胞减数分裂染色体配对行

为、繁育特征和形态特征进行了比较分析，结果表明：(1)这两个分类单位形态差异较小，H．longearista－

ta的外稃芒较长，叶片较宽，每小穗具2--3个小花；H．duthiei的外稃芒较短，叶片较窄，每小穗具1～2

个小花。(2)它们很容易杂交，杂种F_l染色体配对频率很高，为13～14个二价体。(3)亲本种花粉育

性和结实性正常，杂种F_l花粉育性较低，结实性较差。(4)H．longearistata和H．duthiei亲缘关系很

近，是同一物种。由于地理分布和生境的差异，使它们在形态上开始分异，并出现一定程度的生殖隔离。

把H．longearistata处理为Hystrix duthiei的一亚种是合理的。

关键词: 猬草, 长芒猬草, 种间杂种, 生物系统学, 染色体配对, 繁育性

Abstract:

Morphological comparison, cytogenetic study and fertility analysis of Hystrix

duthiei (2n = 28) from China, Hystrix longearistata (2n= 28) from Japan and their artifi-

cial hybrids were carried out. Morphologically H. duthiei was similar to H. longearistata.

H. longearistata had longer lemma awn, wider leaf and 2～3 florets per spikelet, while H.

duthiei had 1～2 florets per spikelet. These two taxa can be easily crossed. F_l hybrids

showed very high degree of bivalent pairing (13～14 bivalents) at the metaphase- I of meio-

sis. No multivalents were found. The fertility of pollen and seed set of the parents were nor-

mal, while the F_l hybrids were of only partial fertility. H. longearistata was closely related

to H. duthiei. They should be included in the same species. Because of the differences of

their distributions and habitats, some morphological divergency and a little sterility barrier

have had appeared between them. It is reasonable to treat Hystrix longearistata as a sub-

species of Hystrix duthiei .

Key words: Hystrix duthiei, Hystrix longearistata, Interspecific hybrids, Biosystematcs

周永红,杨俊良,颜济,郑有良. 小麦族下Hystrix longearistata和Hystrix duthiei的生物系统学研究[J]. 中国科学院大学学报.

ZHOU Yong-Hong, YANG Jun-Liang, YAN Ji, ZHENG You-Liang. Biosystematic studies on Hystrix longearistata from Japan and Hystrix duthiei from China (Poaceae: Triticeae)[J]. .

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