Examination of unidentifiable spined loach individuals found in the overlap zone of two tetraploid species within a single river in Japan

AbstractAlthough small benthic freshwater fish species are an important biological component of fish assemblages and free instream movement is indispensable for their survival, they are often neglected in fish pass performance studies. In this study, a capture-mark-recapture approach was used to assess whether small bottom-dwelling species, including gudgeon (Gobio gobio), stone loach (Barbatula barbatula), spined loach (Cobitis taenia) and bullhead (Cottus gobio), were able to cross a pool-and-weir fish pass in a regulated lowland river. Some tagged individuals of stone loach (18%), gudgeon (7%) and spined loach (2%) managed to successfully ascend the fish pass under study, despite the fact that water velocity levels in the different overflows of the facility (between 0.55-1.22 m/s) exceeded the critical swimming speed of all three species. Although this suggests that a pool-and-weir fish pass is a able to facilitate upstream movement of some small benthic species in a regulated river, more detailed research incorporating advanced tagging and retrieving techniques is necessary.

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Habitat selection during spawning season of the spined loach, Cobitis sp. ‘yamato’ complex, in the Kyushu Island, Japan

Folia Zoologica ◽

10.25225/fozo.v60.i4.a8.2011 ◽

2011 ◽

Vol 60 (4) ◽

pp. 315-321 ◽

Cited By ~ 1

Author(s):

Eun-Jin Kim ◽

Jun Nakajima ◽

Norio Onikura

Keyword(s):

Habitat Selection ◽

Spawning Season ◽

Spined Loach ◽

Kyushu Island

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Interploid Hybridizations in Ornamental Cherries Using Prunus maackii

Journal of Environmental Horticulture ◽

10.24266/0738-2898.30.2.89 ◽

2012 ◽

Vol 30 (2) ◽

pp. 89-92

Author(s):

Margaret Pooler ◽

Hongmei Ma ◽

David Kidwell-Slak

Keyword(s):

United States ◽

Tissue Culture ◽

Cold Hardiness ◽

Diploid Species ◽

Pest Resistance ◽

The United States ◽

Tetraploid Species ◽

Genetic Base ◽

Flowering Cherry ◽

New Cultivars

The United States National Arboretum has an ongoing flowering cherry (Prunus) breeding program aimed at broadening the genetic base of cultivated ornamental cherries by developing new cultivars with disease and pest resistance, tolerance to environmental stresses, and superior ornamental characteristics. Interploid crosses, specifically 2X × 4X, in ornamental Prunus would be beneficial in breeding because they could allow introgression of traits not available in the diploid germplasm (pest resistance, cold hardiness), and could result in the creation of seedless triploids that would not set nuisance fruit and possibly have extended bloom durations. This report documents successful hybridization of P. maackii (Manchurian or Amur cherry), a tetraploid species, with P. campanulata, P. ‘Umineko’, and P. maximowiczii, all diploid species. Chromosomes of one of these resulting triploid hybrids were successfully doubled using oryzalin in tissue culture to create a hexaploid plant.

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An investigation of the karyotypes of four species from the genera Setcreasea, Spironema and Tradescantia (Commelinaceae)

Acta Societatis Botanicorum Poloniae ◽

10.5586/asbp.1989.040 ◽

2014 ◽

Vol 58 (4) ◽

pp. 527-540

Author(s):

Elżbieta Weryszko-Chmielewska

Keyword(s):

Tetraploid Species ◽

Setcreasea Purpurea ◽

Total Length ◽

The Family

An investigation was conducted on the number and morphology of the chromosomes of four species from the family Commelinacene: Spironema fragrans Lindl., Setereasea purpurea Boom, Tradescantia albiflora Kunth. and Tradescantia blossfeldiana Mildbr. It was found that the karyotype of Spironema fragrans Lindl. was 2n = 12 chromosomes whose total length was 6.9-13.7 µm and the formula of the karyotype was: 2m+2sm +2m+2t+2stsat +2st Setcreasea purpurea Boom. had 2n = 24 chromosomes, 9.1-12.1 µm in length and the centromere positioned as represented by the formula 24m. The karyotype of Tradsescantia albiflora Kunth. had 2n = 60 chromosomes whose lengths ranged from 1.4 to 4.5 µm, and is described by the formula: 4sm+6m+10st+10sm+10m+20sm. The complex of chromosomes from Tradescantia blossfeldiana Mildbr. consisted of 2n = 60. Their length was 1.3-4.8 µm. The morphological types of the chromosomes are represented by the formula 6st+2m+2sm+6st+2sm+12m+10M+l4m+6sm. It is suggested on the basis of morphological analysis of chromosomes that Setereasea purpurea Boom is a tetraploid species and Trudescantia albiflora Kunth. and T. blossfeldiana Mildbr. are decaploids.

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EVOLUTIONARY GENETICS OF DIPLOID-TETRAPLOID SPECIES OF TREEFROGS OF THE GENUS HYLA

Evolution ◽

10.1111/j.1558-5646.1979.tb04713.x ◽

1979 ◽

Vol 33 (2) ◽

pp. 595-608 ◽

Cited By ~ 19

Author(s):

Dennis B. Ralin ◽

Robert K. Selander

Keyword(s):

Evolutionary Genetics ◽

Tetraploid Species

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Why so few pseudogenes in tetraploid species?

Trends in Genetics ◽

10.1016/0168-9525(94)90102-3 ◽

1994 ◽

Vol 10 (12) ◽

pp. 418-419 ◽

Cited By ~ 8

Author(s):

Dan Larhammar ◽

Carl Risinger

Keyword(s):

Tetraploid Species

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A Cytogenetic, Morphological, and Ecological Comparison of Seven Different Species of Achillea.ssp. Accessions in Kurdistan Province, Iran

10.21203/rs.3.rs-239139/v1 ◽

2021 ◽

Author(s):

Fatemeh Nezhadi ◽

farzad fayaz ◽

Hooshmand Safari ◽

Ezzat Karami ◽

Abdol Rahman Rahimi

Keyword(s):

Principal Component Analysis ◽

Species Diversity ◽

Principal Component ◽

Component Analysis ◽

Chromosome Length ◽

Base Number ◽

Tetraploid Species ◽

Medicinal Species ◽

Natural Habitats ◽

Environmental Indices

Abstract We conducted the present study on seven important medicinal species of Achillea (4 replications per species) (in a total of 28 samples) in their natural habitats in two consecutive years (2018, 2019) in terms of morphological, cytogenetic, and ecological aspects. This study aimed to examine the environmental variables affecting the morphology, cytogenetics, and evolution of the plant. The results indicated that the populations had a Ploidy base number (x= 9) and the diploid, tetraploid, and hexaploid levels were observed. In addition to the inter-species diversity, there was the intra-species genetic diversity as (4x, 6x) Ac. millefolium (2x, 4x), Ac.vermicularis (2x, 4x), Ac. tenuifolia (2x, 4x), Ac. Alppica(2x) , Ac.talagonica(2x),Ac. biebersteinii, and Ac.wilhelmsii (4x). Further studies also indicated that 11 out of 28 populations had 1A symmetry, 15 populations had 2B symmetry, a population had 2A, and another population had 2B. Principal component analysis (PCA) of cytogenetic variables could not differentiate the species well probably due to the superiority of intra-species diversity of populations to inter-species diversity. Therefore, it seems that the evolution and speciation of this genus are mostly due to the increase or decrease in the amount of chromatin and chromosome length. The examination of principal component analysis in environmental indices also showed that Ac. millefolium hexaploid species was more adapted to the environment with higher percentages of clay and silt while the Ac.tenuifolia tetraploid species preferred a sandy habitat over other environmental factors. Furthermore, Ac.vermicularis tetraploid species indicated the greatest sensitivity to altitude. However, the Ac.biebersteinii tetraploid species reacted to meteorological parameters, such as perception rate and minimum temperature.

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