☰ Contents · Biology

Biotechnology and achievements in Uzbekistan

Lessons 34–35 · 2 lessons · A. G‘afurov, A. Abdukarimov, J. Tolipova, O. Ishankulov, M. Umaraliyeva, I. Abdurahmonova. Biology, Grade 10, 1st edition. “Sharq” publishing and printing joint-stock company, Tashkent, 2017
35

Achievements of genetic engineering and biotechnology in Uzbekistan

Textbook: pp. 145–146
GoalExplain the research directions and achievements of genetic engineering and biotechnology in Uzbekistan.
New words
PCR · PZRDNA fingerprinting · DNK daktiloskopiyasigene knockout · nokautrhizosphere · rizosfera
Explanation

Genetic engineering research in Uzbekistan began in the early 1980s on the initiative of Academy of Sciences scientists; scientists such as Academician O. Sodiqov and A. Abdukarimov played a large part. Later institutes of genetics and scientific centres specialising in genetic engineering (the “Geninmar” programme and centre) were set up. The main direction is cotton: scientists isolated and cloned several dozen genes that determine fibre length, early flowering and tolerance of stresses (drought, salinity, disease), and worked on obtaining cotton varieties with high agronomic performance by changing the activity of these genes by “gene knockout”. In medicine, molecular diagnosis of dangerous infectious and hereditary diseases by PCR, work on detecting hepatitis B and a vaccine against it, and a study of the inheritance of cardiomyopathy were carried out. In forensic medicine DNA fingerprinting (identifying a person by DNA sequence) is used. In the environmental direction, research was done on transferring genes of Pseudomonas bacteria that break down pesticide residues in soil and groundwater into bacteria of the cotton rhizosphere. The current task is to create high-yielding crop varieties resistant to water shortage, salinity, diseases and pests.

Worked examples
If a gene that controls cotton fibre length is changed, fibre quality may improve; so such genes are important for research. New varieties are field-tested for several years and improved together with traditional breeding.
With PCR even a tiny sample of pathogen DNA is multiplied and detected: copies double every cycle, and after 20 cycles there are 2²⁰ = 1 048 576 copies.
Class activity

“Map of research directions”: groups prepare a poster each on cotton, medicine, forensics and ecology and give a short presentation.

Practice
1
Which plant is the main object of genetic engineering in Uzbekistan and why?
2
What role does PCR play in medicine?
3
How many copies does one molecule give in 15 PCR cycles? (Number only.)
4
Why does DNA fingerprinting identify a person?