Cytogenetic analysis of three Hordeum x Elymus hybrids

Lee, Y. H.; Balyan, H. S.; Wang, B. J.; Fedak, George

doi:10.1007/bf00023779

Cited by 5 publications

(1 citation statement)

References 17 publications

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“…Leger barley (Fejer et al 1984), although quite tall, has strong straw that was obtained from an original hybrid with Hordeum leporinum (Hamilton et al 1955). Intergeneric hybridization of barley with other species in the tribe Triticeae, such as wheat, wheatgrasses, and rye, was conducted during the period 1970-1980 (Fedak 1992;Shepherd and Islam 1992;Lee et al 1994).…”

Section: Introductionmentioning

confidence: 99%

Cytogenetic analyses of intergeneric hybrids between barley and nine species of Elymus

Fedak

Han

et al. 2008

Genome

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Wild species in the Triticeae tribe are very valuable resources for agronomic improvement in cereal crop species. Intergeneric hybrids were produced between several barley cultivars and perennial species in the genera Elymus, Thinopyrum, and Pseudoroegneria. Caryopsis formation and subsequent plantlet regeneration from embryo culture were variable depending on the hybrid combinations. Chromosome numbers and hybrid identity were confirmed by GISH analysis on the somatic cells of the hybrids. While the hybrids showed very robust vegetative growth and exceeded the parental spikes in size, their floral morphologies resembled that of the wild species. Meiotic chromosome analysis revealed that the bivalent formation frequency per cell ranged from 0.06 in Hordeum vulgare 'Betzes' x Elymus curvatus to 3.0 in Elymus humidus x H. vulgare 'Manley'. By GISH analysis on the meiocytes of the hybrid E. humidus x 'Manley', the frequency of autosyndetic bivalents exceeded the allosyndetic bivalent formation, which gave an insight into the genome constitution of E. humidus as an autoallohexploid species. Regardless of the low allosyndetic chromosome pairing between barley and E. humidus, this combination may be useful for further input, since E. humidus is known to carry many valuable genes for biotic and abiotic stress tolerance.

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Section: Introductionmentioning

confidence: 99%