Russian Journal of Genetics

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Prebreeding selection of rice with colored pericarp based on genotyping Rc and Pb genes
(Pleiades Publishing, 2017-01-01)
Аiman Rysbekova
;
D.T. Kazkeyev
;
Bakdaulet N. Usenbekov
;
Ж. М. Мухина
;
Yeldos Almabekovich Zhanbyrbayev
The research was aimed at developing prebreeding resources of Kazakhstan rice varieties with colored pericarp for breeding. During the study, hybrid analysis of inheritance of the trait “colored pericarp” in breeding material used for the work was performed. Rice genotypes with colored pericarp, as well as white rice varieties possessing important breeding traits and maturing under conditions of the republic, were selected from the collection of the Institute of Plant Biology and Biotechnology, Republic of Kazakhstan. Identification of allelic status of Rc (red pericarp) and Pb (anthocyanin pericarp) genes was performed for selected samples using the PCR method. When selecting parental forms for crossing, foreign rice varieties with colored pericarp (Rubin, Mavr, Black rice, etc.) were used as recipient forms. As donors, we used local white rice varieties of Kazakhstan breeding adapted to the soil and climate conditions of rice growing regions (Madina, Marzhan, Bakanasskiy, PakLi) as well as foreign varieties. The ability to set hybrid caryopses and the percentage of sterility were determined in obtained F1 rice hybrids. As a result, the most promising prebreeding material was selected, which will be used for breeding Kazakhstan rice varieties with colored pericarp.
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Comparative Study of the DNA-Damaging Activity of Epichlorohydrin Using Escherichia coli Biosensors and the Comet Assay Method in Mice
(Pleiades Publishing, 2021-09-01)
К. Г. Орджоникидзе
;
Е. В. Игонина
;
Б. С. Жошибекова
;
Serikbai K. Abilev
Abstract A comparative study of the genotoxic effects of methylmethanesulfonate (MMS) and epichlorohydrin (ECH) was performed using bacterial E. coli biosensors and the comet assay method in mice. ECH was shown to induce weaker SOS response and expression of the alkA gene in bacterial cells compared to MMS. In vivo experiments on mice using the comet assay method showed DNA-damaging activity of ECH in cells of the liver, kidneys, and lungs after 3 h of exposure, same as of MMS. The levels of DNA damage caused by ECH in these organs after exposure for 3 h were lower than for MMS. The genotoxic effect of ECH after 18 h of exposure was statistically significant only in a dose of 20 mg/kg in kidney cells.
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