Wyniki wyszukiwania

1

Meiotic behaviour of chromosomes in PMCs and karyotype of Trifolium repens L. from Darjeeling Himalaya

100%

Majumdar S., Banerjee S., De K. K.

Acta Biologica Cracoviensia. Series Botanica

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2004

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tom 46

217-220

Detailed analyses of the chromosome meiotic behaviour and of mitotic metaphase chromosomes (2n = 32), as well as stainability studies of pollen fertility, were carried out in order to determine the cytological status of amphidiploid Trifolium repens L. (Dutch white clover). In amphidiploid (allotetraploid) Trifolium repens L., diploid-like meiotic behaviour of chromosomes was found, with no multivalent formation, and a normal karyotype with a single pair of chromosome having a secondary constriction was observed. These characteristics indicate favourable genetic and cytological stability in nature, and high pollen fertility further enhances its usefulness in breeding.

2

Meiotic behavior of chromosomes in PMCs in plants of Secale vavilovii Grossh. lines with additional heterochromatin in chromosome 2R

84%

Rogalska S. M., Apolinarska B., Achrem M., Slominska-Walkowiak R., Skuza L., Filip E.

Acta Biologica Cracoviensia. Series Botanica

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2002

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tom 44

Meiosis was observed in pollen mother cells in plants of four rye Secale vavilovii Grossh. lines (nos. 52, 109, 116, 225). The behavior of 2R chromosomes with additional heterochromatin, and of other chromosomes, was observed in diakinesis, metaphase I, anaphase I and anaphase II. 2R chromosomes with additional heterochromatin formed ring and rod bivalents without disturbances. Some other chromosomes formed heterobivalents and trivalents as well as chromosome bridges and chromosome fragments, indicating structural modifications.

3

Karyological studies on six bisexual weevil species [Coleoptera, Curculionidae]

84%

Lachowska D., Holecova M., Rozek M.

Folia Biologica

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1999

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tom 47

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nr 3-4

4

Meiotic behaviour and morpho-phenological variation in cut stock (Matthiola incana L.) flower

67%

Irani S. F., Arab M.

Folia Horticulturae

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2017

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tom 29

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nr 1

5

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Plant regeneration from immature inflorescence-derived callus of Italian ryegrass [Lolium multiflorum Lam.]: chromosome number and fertility of regenerated plants

67%

Zwierzykowski Z., Rybczynski J. J.

Journal of Applied Genetics

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1998

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tom 39

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nr 3

Twenty field-grown genotypes of diploid Italian ryegrass (Lolium multiflorum Lam., 2n = 2x = 14) were tested for their ability to induce callus and regenerate plants. Callus cultures were initiated from segments of immature inflorescences cultured on the MS medium supplemented with 4.0 mg L⁻¹ 2,4-D. The calluses were subcultured first on the maintaining medium (MS medium with 2.0 mg L⁻¹ 2,4-D) and later on the rooting medium (MS medium with 0.2 mg L⁻¹ 2,4-D). The frequency of callus induction varied depending on the source of explant and the initial genotype. A total of 473 green plantlets were regenerated, of which 420 were established in the soil. All these plants had the morphological characteristics of Italian ryegrass. Among 372 regenerants analysed cytologically, 302 (81.2%) had the expected diploid chromosome number (2n = 2x= 14), 65 (17.5%) were tetraploid (2n = 4x = 28); several aneuploids and mixoploids were also observed. All diploid and tetraploid regenerants were male and female fertile. However, a great variation of female fertility within and between both groups of regenerants was observed.

6

Meiotic behaviour and chromosome identification in the Portuguese cultivar of triticale 'Douro' using in situ hybridisation

67%

Carvalho A., Guedes-Pinto H., Heslop-Harrison J. S., Lima-Brito J.

Plant Breeding and Seed Science

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2005

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tom 51

Ograniczanie wyników

2 Acta Biologica Cracoviensia. Series Botanica

1 Folia Biologica

1 Folia Horticulturae

1 Journal of Applied Genetics

1 Plant Breeding and Seed Science

1 Achrem M.

1 Apolinarska B.

1 Arab M.

1 Banerjee S.

1 Carvalho A.

1 De K. K.

1 Filip E.

1 Guedes-Pinto H.

1 Heslop-Harrison J. S.

1 Holecova M.

1 Irani S. F.

1 Lachowska D.

1 Lima-Brito J.

1 Majumdar S.

1 Rogalska S. M.

1 Rozek M.

1 Rybczynski J. J.

1 Skuza L.

1 Slominska-Walkowiak R.

1 Zwierzykowski Z.

1 2017

1 2005

1 2004

1 2002