Cytogenetic studies of the intergeneric and interspecific hybrids among the Pseudoroegneria, Roegneria and Elymus (Poaceae: Triticeae)

Abstract

Abstract: The differentiation and phylogeny of the St genome was investigated in the interspecific hybrids of three diploid species of Pseudoroegneria. Intergeneric hybridizations of P. libanotica and P. tauri were carried out with 4 tetraploid species of Roegneria (StY) and with 3 species of Elymus (StH, StYW). The fertility and chromosome pairing behavior in meiosis of the parents and their hybrids F₁ were investigated. 1) The St genome in P. libanotica and P. tauri (from Iran) may differt from that of P. spicata in North America; 2) Differentiation of the St genome was found in allopolyploid species with the StY, StH, and StYW genome combinations; 3) The Y genome is distinct from the H genome but is closely related to the St genome, with which some homology has been observed.

CLC Number:

ZHANG Chun, WANG Xiao-li, YU Hai-qing, ZHANG Hai-qin, ZHOU Yong-hong. Cytogenetic studies of the intergeneric and interspecific hybrids among the
Pseudoroegneria, Roegneria and Elymus (Poaceae: Triticeae)[J]. Acta Prataculturae Sinica, 2009, 18(3): 86-93.

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Cytogenetic studies of the intergeneric and interspecific hybrids among the
Pseudoroegneria, Roegneria and Elymus (Poaceae: Triticeae)

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