Affiliation:
1. Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences
2. Siberian Research Institute of Plant Production and Breeding – Branch of the Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences
Abstract
Triticale (× Triticosecale Wittmack) is of great interest as an insurance crop that can ensure the stability of the gross harvest of feed and food grains at a lower cost. In Western Siberia, only winter triticale varieties are cultivated, however, spring triticales are important for cultivation in regions not suitable for winter crops. To create spring varie ties with high yields and good grain quality, it is necessary to study and enrich the gene pool, identify donors of economically valuable traits. One of the possible ways to solve this problem can be through the production of secondary hexaploid triticales with the involvement of the tetraploid wild-growing species of emmer wheat Triticum dicoccum (Schrank) Schuebl. The aim of this work was to create and study hybrids of emmer T. dicoccum (Schrank) Schuebl. with hexaploid triticale using genomic in situ hybridization for staining of meiotic chromosomes and analysis of plant productivity elements in F4–F8. DT4, DT5, DT6 plants and the prebreeding F6 forms obtained from them – DT 4/168, DT 5/176 and DT 6/186 – were selected according to the characteristics of the productivity and the nature of the grain in the F4 hybrid population. The offspring of hybrids DT4 and DT5 and prebreeding forms DT 4/168 and DT 5/176 had an increased grain nature (over 750 g/l), but low productivity. The hybrid DT6 and the breeding form DT 6/186 obtained from it had high grain productivity (785 ± 41 and 822 ± 74 g/m2, respectively), but, like the paternal form of triticale UK 30/33, had a reduced nature of the grain. In F8 DT 6/186 plants, 7 homologous pairs of rye chromosomes and from 27 to 30 wheat chromosomes were found in meiosis, which indicates the presence of a complete rye genome and two wheat ААВВ genomes. Rye chromosomes showed stable formation of bivalents in contrast to wheat chromosomes, which caused the presence of aneuploids in plant populations. Thus, hexaploid forms DT 4/168 and DT 5/176 with well-made smooth grain and high grain size were obtained, which can be used as a source of this trait for selection of food-grade triticale. DT 6/186 is a promising form for further breeding in order to obtain high-yielding forms of triticale.
Publisher
Institute of Cytology and Genetics, SB RAS
Subject
General Biochemistry, Genetics and Molecular Biology,General Agricultural and Biological Sciences
Reference65 articles.
1. Abdelkawy R.N.F., Turbayev A.Zh., Solov’iev A.A. Technological properties of spring triticale grain grown in the Central Economic Region, Russia. Vestnik Kurskoy Gosudarstvennoy Selskokhozya stven noy Akademii = Bulletin of the Kursk State Agricultural Aca demy. 2020;5:87-97. (in Russian)
2. Ammar K., Mergoum M., Rajaram S. The history and evolution of triticale. In: Triticale Improvement and Production (FAO Plant Production and Protection Paper. 179). Rome, 2004;1-10.
3. Ayalew H., Kumssa T.T., Butler T.J., Ma X.-F. Triticale improvement for forage and cover crop uses in the Southern Great Plains of the United States. Front. Plant Sci. 2018;9:1130. DOI 10.3389/fpls.2018.01130.
4. Badaev N.S., Badaeva E.D., Bolsheva N.L., Maximov N.G., Zelenin A.V. Cytogenetic analysis of forms produced by crossing hexaploid triticale with common wheat. Theor. Appl. Genet. 1985;70(5):536-541. DOI 10.1007/BF00305987.
5. Balyan H.S., Fedak G. Meiotic study of hybrids between barley (Hordeum vulgare L.) and Triticale (× Triticosecale Wittmack). J. Hered. 1989;80(6):460-463. DOI 10.1093/oxfordjournals.jhered.a110898.