Wyniki wyszukiwania

1

Analysis of somatic chromosome numbers in doubled haploid lines of hexaploid Triticale [xTriticosecale Witt.]

100%

Sobieszczanska A.

Acta Biologica Cracoviensia. Series Botanica

|

2000

|

tom 42

|

nr 1

Somatic chromosome number was investigated in twenty doubled haploid (DH) lines derived from anther culture of two triticale cultivars. Nine lines have 42 chromosomes, the rest ranging from 39 to 43. The majority of aberrants (90%) are hypoaneuploids (2n = 39 to 41), but within the KR424 line both hypo- (2n = 39 to 41) and hyperaneuploid (2n = 43) chromosome numbers were identified. The observed frequency of seedlings with aneuploid chromosome numbers within several unstable lines varied from 4% to 31.2%.

2

Zespół pozostawionej tkanki jajnika

51%

Sobieszczanska A., Ochota M., Nizanski W.

Weterynaria w Praktyce

|

2014

|

tom 11

|

nr 05

3

Specyfika rasowa zaburzeń w rozrodzie psów. Cz.I

51%

Malecka M., Rodak O., Sobieszczanska A., Nizanski W.

Magazyn Weterynaryjny

|

2015

|

tom 24

|

nr 10

4

Specyfika rasowa zaburzeń w rozrodzie psów. Cz. II

51%

Malecka M., Rodak O., Sobieszczanska A., Nizanski W.

Magazyn Weterynaryjny

|

2016

|

tom 25

|

nr 01

5

C-banding and nuclear DNA amount in six Bromus species

51%

Joachimiak A., Kula A., Sliwinska E., Sobieszczanska A.

Acta Biologica Cracoviensia. Series Botanica

|

2001

|

tom 43

Conventional and C-banding chromosome studies and nuclear DN A estimations were performed on six Bromus species (B. arvensis, 2n = 2x = 14; B. hordeaceus, 2n = 4x = 28; B. carinatus, 2n = 8x = 56; B. willdenowii, 2n = 6x = 42; B. erectus, 2n = 8x = 56; and B. inermis, 2n = 8x = 56) belonging to three subgenera: subg. Bromus, subg. Ceratochloa and subg. Festucaria. Three species (B. carinatus, B. erectus and B. inermis) show different chromosome numbers within root-tip meristem. Root-tip cells of these high polyploid species (2n = 8x = 56) showed substantial DNA variability. Densitometric and flow-cytometric analyses clearly showed that many interphase nuclei are beyond the expected 2C-4C limit characteristic of cycling cells. The most distinct DNA instabilities were observed in B. carinatus, where we found especially high numerical chromosome variations and many chromosome numbers higher and lower than 2n = 8x = 56. Such quantitative DNA variability is substantially reduced beyond the meristematic part of the roots and virtually absent within leaf mesophyll cells. Estimated nuclear 2C DNA content was 11.63 pg in B. arvensis, 23.03 pg in B. hordeaceus, 22.94 pg in B. carinatus, 12.99 pg in B. willdenowii, 24.65 pg in B. erectus and 24.54 pg in B. inermis. By DNA amount, the analyzed taxa formed two distinct groups: with 2C DNA value at about 12 pg (B. arvensis and B. willdenowii), and at about 24 pg (B. hordeaceus, B. carinatus, B. erectus and B. inermis). Estimated DNA values were not linked with ploidy level. All species showed a similar, mainly telomeric heterochromatin distribution, but small amounts of intercalary and centromeric heterochromatin were also seen. The majority of analyzed species also had similar heterochromatin amounts within karyotype. The only exception was B. carinatus with 16.20% heterochromatin (calculated as percent of karyotype length). It is suggested that the observed 77% nuclear DNA difference between two closely related representatives of subg. Ceratochloa (B. carinatus and B. willdenowii) is to some extent a result of heterochromatin accumulation in B. carinatus chromosomes.

6

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Meeting needs for rehabilitation equipment and home adjustments among the disabled in the their life environment

39%

Kollontaj B., Gorczyca R., Kollontaj W., Jedrych M., Sobieszczanska A., Sobieszczanski J., Karwat I. D.

Annals of Agricultural and Environmental Medicine

|

2015

|

tom 22

|

nr 3

Ograniczanie wyników

2 Acta Biologica Cracoviensia. Series Botanica

2 Magazyn Weterynaryjny

1 Annals of Agricultural and Environmental Medicine

1 Weterynaria w Praktyce

6 Sobieszczanska A.

3 Nizanski W.

2 Malecka M.

2 Rodak O.

1 Gorczyca R.

1 Jedrych M.

1 Joachimiak A.

1 Karwat I. D.

1 Kollontaj B.

1 Kollontaj W.

1 Kula A.

1 Ochota M.

1 Sliwinska E.

1 Sobieszczanski J.

1 2016

2 2015

1 2014