Heterozygosity in Erectoides Mutations in Barley

Hagberg, A.

doi:10.1111/j.1601-5223.1953.tb03410.x

Cited by 19 publications

(2 citation statements)

References 18 publications

(3 reference statements)

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“…Twenty-nine gene loci were identified and most of them have different phenotypic characteristics (Górny 2004 ; Lundqvist 2009 ). Plants with the ert-a allele are 10 to 15 cm shorter than parental cultivars (Hagberg et al 1952 ). The effects of the ert-a on spike density can be partially reversed by GA 3 treatments (Stoy and Hagberg 1967 ).…”

Section: Barley Semi-dwarfing Genesmentioning

confidence: 99%

Effects of the semi-dwarfing sdw1/denso gene in barley

et al. 2013

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Recent advances in cereal genomics have made it possible to analyse the architecture of cereal genomes and their expressed components, leading to an increase in our knowledge of those genes that are associated with the key agronomical traits. Presently, use of a dwarfing gene in breeding process is crucial for the development of modern cultivars. In barley, more than 30 types of dwarfs or semi-dwarfs have been hitherto described. However, only a few of them have been successfully used in barley breeding programs. Both breeding and molecular mapping experiments were undertaken to enhance and evaluate the performance of semi-dwarf barley lines. The semi-dwarfing cultivars had improved lodging resistance and a higher harvest index. There have been a lot of investigations that have contributed new information to our basic understanding of the mechanisms underlying growth regulations in barley. This paper reviews semi-dwarfing genes in barley in general and special attention is paid to mapping of the sdw1/denso locus, changes in protein abundance and associations of the semi-dwarfness with gibberellins.

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Section: Barley Semi-dwarfing Genesmentioning

confidence: 99%

Effects of the semi-dwarfing sdw1/denso gene in barley

et al. 2013

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“…High‐yielding Erectoides were formed by mutation in several gene loci. The most outstanding one is Erectoides 32 in locus ert‐k that became released as a new cultivar ‘Pallas’ in 1958 (Gustafsson ; Hagberg et al , ; Hagberg ; Fröjer et al ; Persson and Hagberg ).…”

Section: Methodsmentioning

confidence: 99%

Scandinavian mutation research in barley - a historical review

Lundqvist¹

2014

Hereditas

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In 1928, the Swedish geneticists Hermann Nilsson-Ehle and Åke Gustafsson started on their suggestion experiments with induced mutations using the barley crop. In 1953, at the instigation of the Swedish Government, the 'Group for Theoretical and Applied Mutation Research' was established. Its aim was to study basic research problems in order to influence and improve methods for breeding cultivated plants. The research was non-commercial, even if some mutants were of practical importance. The peaks of activities occurred during the 1950s, 1960s and 1970s. Applying X-rays and UV-irradiation very soon the first chlorophyll mutations were obtained followed by the first viable mutations 'Erectoides'. Soon the X-ray experiments expanded with other types of irradiation such as neutrons etc. and finally with chemical mutagens, starting with mustard gas and concluding with the sodium azide. The research brought a wealth of observations of general biological importance, high increased mutation frequencies, difference in the mutation spectrum and to direct mutagenesis for specific genes. A rather large collection of morphological and physiological mutations, about 12 000 different mutant alleles, with a very broad variation were collected and incorporated into the Nordic Genetic Resource Center (NordGen) Sweden. Barley, the main experimental crop has become one of the few higher plants in which biochemical genetics and molecular biological studies are now feasible. The collection is an outstanding material for mapping genes and investigating the barley genome. Several characters have been studied and analyzed in more detail and are presented in this historical review.

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Physiological Evidence of Hybridization and Reticulate Evolution in Phlox Maculata

Hadley

Levin

1969

American J of Botany

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A comparative physiological analysis was conducted on a hybrid swarm involving P. maculata subsp. maculata and P. glaberrima subsp. interior. The population contained an array of segregates and introgressants. Hybrids displayed a high degree of heterogeneity in their physiological attributes, some characters being intermediate to, similar to, or transgressing those of the parental taxa. For example, both net photosynthetic rates and net photosynthetic/dark respiratory ratios were enhanced in the hybrids, and the level of enhancement was associated with the level of morphological intermediacy. Conversely, no enhancement was noted in either respiration rates or foliar fresh weight/ovendry weight ratios of the hybrids. Because of physiological imbalance, about one‐third of the hybrids were eliminated early in their development. Representatives of P. maculata subsp. pyramidalis, a putative stabilized derivative of hybridization between the above two parental species, were intermediate in most physiological features and closely resembled some natural hybrids. The data verify that the physiological features of subspecies pyramidalis can be assembled through recombination of the P. maculata and P. glaberrima genomes.

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Heterozygosity in Erectoides Mutations in Barley

Cited by 19 publications

References 18 publications

Effects of the semi-dwarfing sdw1/denso gene in barley

Effects of the semi-dwarfing sdw1/denso gene in barley

Scandinavian mutation research in barley - a historical review

Physiological Evidence of Hybridization and Reticulate Evolution in Phlox Maculata

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