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C-banding analysis of eight species of Kengyilia (Poaceae: Triticeae)

100%

Zeng J. , Cao G. , Liu J. , Zhang H.-Q. , Zhou Y.-H.

Journal of Applied Genetics

2008

tom 49

nr 1

11-21

To characterize chromosomes and the interspecific relationships within the genus Kengyilia, 8 species were used for Giemsa C-banding analysis. Results indicated that the species differed in C-banding patterns. K. gobicola, K. alatavica and K. batalinii had distinct centromeric bands and no banded chromosomes, while K. hirsuta, K. longiglumis, K. melanthera, K. rigidula and K. thoroldiana had more abundant and diagnostic C-bands with interstitial and terminal bands.

Wide hybridization in the Triticeae involving Hordeum, Triricum, Triticale and Hordeum x Secale

86%

Wojciechowska B. , Pudelska H.

tom 35

nr 4

221-230

Intergeneric hybridization was carried out between various accessions of Hordeum jubatum (4x) and cultivars of Triticum aestivum (6x) and Triticale (6x) as well as T.monococcum (2x) and between cultivars of Triticum aestivum (6x) and the hybrid (Horodeum jubatum 4x X Secale cereale 4x) in both directions.The hybrid progeny was obtained via embryo culture from crosses of H.jubatum x T.aestivum and T.aestivum x(H.jubtum 4x X S.cereale 4x).The hybrid of H.jubatum x T.aestivum was produced at the frequency of 1.7% in relation to pollinated florets and five hybrids of T.aestivum x (H.jubatum 4x x S.cereale 4x) from successful combinations were produced at the frequency of 2.00-4.88%.The hybrids exibited varitionin somatic chromosome number.In meiocytes of two T.aestivum x (H.jubatum 4x X S.cereale 4x) plants a high chromosome instability was also found.The chromosomes were associated mostly as univalents, but some pairings (0.03-3.50 per cell) mainly as rod bivalents were observed.