Isozyme diversity and genetic structure of barrenwort (Berberidaceae) populations

2011 ◽  
Vol 131 ◽  
pp. 58-66 ◽  
Author(s):  
Maoyin Sheng ◽  
Lingjiao Wang ◽  
Kangning Xiong
Keyword(s):  
Genetic Structure ◽  
Isozyme Diversity

Isozyme diversity and genetic structure of buckwheat populations

2011 ◽  
Vol 39 (4-6) ◽  
pp. 458-470 ◽  
Author(s):  
Mao-Yin Sheng ◽  
Lin-Jiao Wang ◽  
Kang-Ning Xiong
Keyword(s):  
Genetic Structure ◽  
Isozyme Diversity

scholarly journals Genetic Structure of Natural Populations of Wild Sunflowers (Helianthus annuus L.) in Australia

1986 ◽  
Vol 39 (3) ◽  
pp. 255 ◽  
Author(s):  
PJ Dry ◽  
JJ Burdon
Keyword(s):  
Genetic Structure ◽  
Gene Diversity ◽  
New South ◽  
Geographic Distance ◽  
Natural Populations ◽  
Wild Populations ◽  
South Wales ◽  
Fixation Indices ◽  
O 19 ◽  
Isozyme Diversity

The genetic structure of 11 wild populations of H. annuus occurring in New South Wales and Queensland was determined by isozyme analysis. Considerable isozyme diversity was found among loci within and between populations, with three to five alleles being identified at each of 10 loci. Mean levels of heterozygosity ranged from o� 19 to O� 38 and gene diversity values from 0�29 to O� 52. In all populations Wright's fixation indices were positive (0�09-0� 51) suggesting a degree of inbreeding. Differences in the level of genetic differentiation between populations were not correlated with geographic distance. Indeed, notable genetic diversity was detected between six sites occurring within a 2-km radius of Gunnedah, N.S.W., where the genetic distance relationships were D = 0�13 � 0'08, the same as those between popUlations throughout the region.

Modeling of dynamic mosaicism on ring chromosomes in human fibroblasts and IPSCS

2020 ◽  
pp. 12-13
Author(s):  
Т.В. Никитина ◽  
А.А. Кашеварова ◽  
М.М. Гридина ◽  
А.А. Хабарова ◽  
А.Г. Мензоров ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Human Fibroblasts ◽  
Cellular Heterogeneity ◽  
Mitotic Stability ◽  
Factors Affecting ◽  
Ring Chromosomes ◽  
Cell Clones ◽  
Mitotic Instability ◽  
Mitotic Behavior

Митотическая нестабильность кольцевых хромосом может приводить к появлению клеточных клонов с различной генетической структурой. В качестве модели нестабильности кольцевых хромосом в митозе мы использовали фибробласты от пациентов с r(8), r(13), r(18) и r(22) и полученные из них индуцированные плюрипотентные стволовые клетки (ИПСК). Линии ИПСК с r(22) имели относительно стабильный кариотип на протяжении десятков (до 60) пассажей и сохраняли неизменную структуру кольцевой хромосомы. Кариотип линий ИПСК с r(8) и r(18) на ранних пассажах стабильный, планируется его изучение на поздних пассажах. Наибольшее разнообразие кариотипа выявлено в линиях ИПСК с r(13), в которых наблюдали различные перестройки и выраженную клеточную гетерогенность. Определение факторов, влияющих на митотическую стабильность кольцевых хромосом, может иметь значение для консультирования пациентов. Mitotic instability of ring chromosomes can lead to the appearance of cell clones with different genetic structure. IPSCs from fibroblasts of patients with r(8), r(13), r(18), and r(22) were used as a model of ring chromosomes mitotic behavior. Karyotypes of iPSC lines with r(8) and r(18) have so far been evaluated only in the early passages, lines with r(22) have maintained a relatively stable karyotype up to 60 passages. The occurrence of rearrangements and cellular heterogeneity was found characteristic for r(13) iPSCs. The determination of factors affecting the ring chromosomes mitotic stability would be beneficial for the patient’s prognosis.

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