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Cytogenetic Study of a Trigeneric (Triticale × Trileymus) Hybrid

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Summary

In this study a new trigeneric hybrid involving species from the Triticum, Secale and Leymus was produced by crossing octoploid triticale (Jinsong49) with octoploid tritileymus (950059). The chromosome constitution of the parental amphiploid, trigeneric hybrid and its progenies were studied. Genomic in situ hybridization (GISH) analysis showed that Jinsong49 and 950059 had 44 wheat chromosomes, and 12 rye chromosomes, 12 L. mollis chromosomes respectively. The mean meiotic configuration of trigeneric hybrid F1 was 13.17 I + 20.82 II + 0.37 III + 0.02 IV. GISH results indicated the trigeneric hybrid F1 had 6 rye chromosomes and 6 Leymus chromosomes. In the selfed derivatives of the trigeneric hybrids, while the number of selfed generation increased, the mean number of chromosomes tends to decrease gradually and slowly. GISH results revealed that most plant tested in the progeny population had 8–12 rye chromosomes, and no Leymus chromosomes were detected. The results indicated that rye chromosomes can be preferentially transmitted in the progenies of trigeneric hybrid than Leymus chromosomes.

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Authors and Affiliations

  1. The Key Laboratory of Crop Biology of Shandong, Shandong Agricultural University, Taian, 271018, China

    Xing-Feng Li, Zhen-Qiao Song, Shu-Bing Liu, Ju-Rong Gao & Hong-Gang Wang

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  1. Xing-Feng Li
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  2. Zhen-Qiao Song
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  3. Shu-Bing Liu
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  4. Ju-Rong Gao
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  5. Hong-Gang Wang
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Li, XF., Song, ZQ., Liu, SB. et al. Cytogenetic Study of a Trigeneric (Triticale × Trileymus) Hybrid. Euphytica 150, 117–122 (2006). https://doi.org/10.1007/s10681-006-9099-2

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  • DOI: https://doi.org/10.1007/s10681-006-9099-2

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