Morphology and cytology of intergeneric hybrids between Hystrix duthiei ssp. longearistata and Psathyrostachys huashanica （Poaceae: Triticeae）

doi:10.7523/j.issn.2095-6134.2002.5.005

›› 2002, Vol. 40 ›› Issue (5): 421-427.DOI: 10.7523/j.issn.2095-6134.2002.5.005

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Morphology and cytology of intergeneric hybrids between Hystrix duthiei ssp. longearistata and Psathyrostachys huashanica （Poaceae: Triticeae）

ZHANG Hai-Qin, ZHOU Yong-Hong, ZHENG You-Liang, YANG Rui-Wu, DING Chun-Bang

Received:1900-01-01 Revised:1900-01-01 Online:2002-09-10
Contact: ZHANG Hai-Qin

Abstract

Abstract:

In order to determine its genomic constitution, Hystrix duthiei ssp. longearistata was

crossed with Psathyrostachys huashanica. Hybrids were obtained successfully from this combination.

Morphology, fertility and chromosome pairing behavior in meiosis of the parents and their hybrids F₁

were investigated. The results showed obvious morphological differences between H. duthiei ssp.

longearistata and P. huashanica, and intermediate spikes of the F₁ plants between the two parental

species. The hybrids were completely sterile. Chromosome pairing at MI of PMCs in F₁ hybrids was

relatively high and 55.12% of PMCs showed 5 or 6 bivalents per cell. Meiotic configurations were

9.83 Ⅰ + 5.46 Ⅱ+ 0.07 Ⅲ, with C-value of 0. 57, which indicated that H. duthiei ssp.

longearistata and P. huashanica should share one Ns genome. The relationship between Hystrix

and Leymus was also discussed.

Key words: Hystrix duthiei ssp. Longearistata, Psathyrostachy huashanica, Intergeneric hybrid, Meiosis, Genome, Chromosome pairing, Relatipnship

ZHANG Hai-Qin, ZHOU Yong-Hong, ZHENG You-Liang, YANG Rui-Wu, DING Chun-Bang. Morphology and cytology of intergeneric hybrids between Hystrix duthiei ssp. longearistata and Psathyrostachys huashanica （Poaceae: Triticeae）[J]. , 2002, 40(5): 421-427.

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Morphology and cytology of intergeneric hybrids between Hystrix duthiei ssp. longearistata and Psathyrostachys huashanica （Poaceae: Triticeae）

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