Genome relationships between Hordeum vulgare L. and H. bulbosum L.

Kasha, K. J.; Sadasivaiah, R. S.

doi:10.1007/bf00326278

Cited by 86 publications

(23 citation statements)

References 13 publications

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“…Among diploid, triploid and tetraploid H. vulgare × H. bulbosum hybrids there is variation in chromosome number and pairing at meiosis (Kasha and Sadasivaiah, 1971); only hybrids with consistent and stable chromosome numbers and high intergenomic pairing are suitable for introgression. The level of pairing is influenced by both parents (Thomas and Pickering, 1985) and we have selected superior genotypes for producing "high-pairing" hybrids.…”

Section: Hybrid Instability and Chromosome Pairingmentioning

confidence: 99%

“…When the genome ratio is 1 or 11 "V":1 "B", chromosome elimination is the rule (where "V" and "B" are the genome formulae of H. vulgare and H. bulbosum, respectively). If the genome ratio favours the H. bulbosum parent, then both parental chromosome complements are retained (Kasha and Sadasivaiah, 1971). Nevertheless, it is still possible to obtain hybrids.…”

Section: Interspecific Incompatibilitymentioning

confidence: 99%

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Recent progress in barley improvement using wild species of <i>Hordeum</i>

Pickering

Johnston²

2005

Cytogenet Genome Res

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In this review we describe recent progress in barley (Hordeum vulgare) improvement through hybridisation with its wild relatives. We have focused on one species in the secondary genepool of cultivated barley, namely H. bulbosum. This wild species has desirable traits, such as disease resistance, that are worthwhile transferring to its cultivated relative. Progress has been achieved through developing partially fertile interspecific hybrids that have been selfed or backcrossed to barley. We present the results of cytogenetic and molecular analyses that have enabled us to characterise and produce agronomically useful recombinant lines obtained from the hybrids.

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Section: Hybrid Instability and Chromosome Pairingmentioning

confidence: 99%

Section: Interspecific Incompatibilitymentioning

confidence: 99%

Recent progress in barley improvement using wild species of <i>Hordeum</i>

Pickering

Johnston²

2005

Cytogenet Genome Res

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“…It is likely that chromosome elimination occurred in the spike primordia as observed in the present materials, so that functional gametes consisted mainly of H. vulgare chromosomes. They found no transfer of H. bulbosum characteristics to barley in spite of the extensive homology and pairing of chromosomes between these species as reported by Kasha and Sadasivaiah (1971).…”

Section: Discussionmentioning

confidence: 71%

“…Kasha and Sadasivaiah (1971) and Lange (1971b) observed that chromosome numbers ranged from 7 to 16 in pollen mother cells of diploid hybrids with only about 40% having the expected number (14). Lange and Jochemsen (1976a, b) tried to cross diploid, triploid, tetraploid and hexaploid hybrids with diploid and tetraploid cytotypes of H. vulgare and H. bulbosum.…”

Section: Discussionmentioning

confidence: 99%

Chromosome elimination in different meristematic regions of hybrids between Hordeum vulgare L. and H. bulbosum L..

Noda

Kasha

1981

The Japanese journal of genetics

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Cytological observations were made on spike primordia as well as root and leaf meristems of hybrids between Hordeum vulgare and H, bulbosum (2x) to elucidate mechanism of chromosome elimination. High frequencies of cells with micronuclei were observed in spike primordia of the hybrids examined. The average percentages of cells with micronuclei in three different hybrids were 16.8% (R25788), 12.9% (S92-201) and 7.9% (5130-200). About 40% of spike primordium cells of R25788 had fewer chromosomes than the 14 expected in a diploid hybrid. On the other hand, in root and leaf meristems of R25788, percentages of cells with micronuclei were 2.3% and 2.4%, respectively. Also, 94.6% of root meristem cells of R25788 had the expected hybrid chromosome number. Thus, chromosome elimination in hybrids between H. vulgare and H. bulbosum appears to be a tissue-dependent phenomenon, perhaps related to the extent of differentiation required. Disturbances in nuclear division were also examined. Percentages of cells with non-congressed chromosomes at metaphase and lagging chromosomes at anaphase were 15.2% and 20.7%, respectively in spike primordia of R25788. These percentages are similar to those of cells with micronuclei in spike primordia of R25788. It is suggested that failure of congression of some chromosomes during prometaphase is the main mitotic disturbance leading to chromosome elimination.

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“…The interspecific cross between Hordeum bulbosum L. (2n = 2X =14) and H. vulgare L. (2n = 2X =14) results in a haploid barley (2n = X = 7) by the preferential elimination of bulbosum chromosomes during somatic cell division (Kao and Kasha 1969;Kasha and Kao 1970;Kasha and Sadasivaiah 1971;Lange 1971a, b;Symko 1969). This haploidization has also been confirmed to occur in the hybrid between tetraploids of these two species.…”

Section: Introductionmentioning

confidence: 84%

Genetic control and mechanism of chromosome elimination in the hybrids between Hordeum bulbosum (4X) and H. vulgare (4X).

Fukuyama

Hosoya

1983

The Japanese journal of genetics

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Two strains of Hordeum bulbosum (4X), X191 and X487, were reciprocally crossed to a strain of H. vulgare (4X), D8/55, and their hybrid embryos were cytologically examined in order to know time, pattern and genetic control of somatic chromosome elimination occurred in the tetraploid hybrids between these species.Fourty hybrid embryos from each cross were sampled at 6 different times from 3 to 13 days after pollination. In all of the crosses, chromosome elimination occurred very frequently by about 9 days after pollination and a number of dihaploid cells were observed. The maximum rate of chromosome elimination was observed in the period of 3 to 5 days after pollination. It was cleary indicated that degree of chromosome elimination or dihaploid frequencies were quite different between the crosses with X191 and X487 but not different between reciprocals. This strongly suggests that the chromosome elimination is mainly controlled by nuclear gene (s) involved in bulbosum parents, but affected little by cytoplasms of these two species.

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Genome relationships between Hordeum vulgare L. and H. bulbosum L.

Cited by 86 publications

References 13 publications

Recent progress in barley improvement using wild species of <i>Hordeum</i>

Recent progress in barley improvement using wild species of <i>Hordeum</i>

Chromosome elimination in different meristematic regions of hybrids between Hordeum vulgare L. and H. bulbosum L..

Genetic control and mechanism of chromosome elimination in the hybrids between Hordeum bulbosum (4X) and H. vulgare (4X).

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