TSitologiya i Genetika 2023, vol. 57, no. 1, 44-54
Cytology and Genetics 2023, vol. 57, no. 1, 35–43, doi: https://www.doi.org/https://doi.org/10.3103/S0095452723010115

Distribution of alleles of β-carotene hydroxylase 1 gene in modern genotypes of Zea mays L.

Satarova T.M., Denysiuk K.V., Cherchel V.Yu., Dziubetskyi B.V.

  • State Enterprise the Institute of Grain Crops of National Academy of Agrarian Sciences of Ukraine, Volodimir Vernadskij st., 14, Dnipro, 49009, Ukraine

SUMMARY. Carotenoids as precursors for the vitamin A synthesis are important micronutrients for food and feed. β-Carotene is a carotenoid which converts into vitamin A in animal organisms most effectively. The increase in its content in mature maize grain is possible via marker-associated selection by the identification of genotypes with favorable allelic state of the key genes of carotenoid biosynthesis and utilization. The gene of β-carotene hydroxylase 1 is important for the accumulation of β-carotene in mature maize grain. One of its alleles blocks the transition of β-carotene into β-cryptoxanthin and thus ensures the accumulation of β-carotene in mature grain. This allele is detected by the marker crtRB1-3′TE using the polymerase chain reaction as an amplicon of 543 bp unlike two others, 296 bp and 296 + 875 bp, which are not associated with an increase in β-carotene content in the grain of complete maturity. It was established that 26.7 % among 15 well-known inbreds of foreign breeding and 21.6 % of inbreds within 153 perspective inbreds of the Dnipro breeding program carried the allele of β-carotene hydroxylase 1 gene (543 bp) favorable for the accumulation of β-carotene. Allele 543 bp of β-carotene hydroxylase 1 gene by the marker crtRB1-3′TE was found among most of the analyzed maize subspecies, germplasms, and maturity groups. The tendency to its increased frequency for inbreds with flint grain type, Lancaster and Lacon germ-plasms as well as early and middle early inbreds was noticed. Modern perspective inbreds – the carriers of allele 543 bp on gene of β-carotene hydroxylase 1 by marker crtRB1-3′TE, are recommended for the application in special programs of marker-assisted se-lection to increase the content of β-carotene in maize subspecies, groups of maturity, and different types of germplasm.

Keywords: maize, carotenogenesis, β-carotene, molecular genetic markers, inbred, crtRB1 gene

TSitologiya i Genetika
2023, vol. 57, no. 1, 44-54

Current Issue
Cytology and Genetics
2023, vol. 57, no. 1, 35–43,
doi: https://doi.org/10.3103/S0095452723010115

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