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COLLECTION OF SAMPLES OF FOURSPECIES FORMS OF TRITICALE

COLLECTION OF SAMPLES OF FOURSPECIES FORMS OF TRITICALE

Institution

Section

SOURCES AND DONORS

Abstract

Goal. To systematize and study the collection of accessions of fourspecies forms of triticale of Uman National University of Horticulture.

Results and Discussion. The article presents information on working with the genetic diversity of samples of fourspecies forms of triticale obtained by crossing threespecies triticale with spelta. .We crossed threespecies triticale with spelta and stabilized the hybrids obtained. Here, we created fourspecies forms of triticale with different variants of gene recombinations between homeologous chromosomes of triticale and spelta. Involvement of spelta in triticale breeding will improve quantitative and qualitative parameters of performance. The collection accessions of fourspecies triticale were created and investigated in an experiment field of Uman national university of Horticulture in 2006-2013. The source material for fourspecies forms of triticale was threespecies triticale cultivars Rozovskiy 6, Rozavskiy 7, Yunga, Ladnoye and other threespecies triticale accessions as well as spelta Triticum spelta L. cv. Zarya Ukrainy. Hybridization was performed by anther removing in a maternal form and its pollinating with a paternal form. Threespecies triticale was used as maternal forms, and spelta – as pollinator. Threespecies triticale was crossed with spelta. The first generation hybrids were highly sterile. The ear fertility in F1 hybrids was 0.1%. That is why these hybrids were re-crossed with threespecies triticale. As a result, sterile, partially sterile and fertile progeny were obtained. Then the progeny were stabilized. For this purpose, the progeny were self-pollinated for several generations. As a result, the progeny with high parameters of fertility and grain number per ear was obtained. Forms with wide diversity of economically valuable characteristics and morpho-biological traits were selected of the progeny via individual/kin selection. Today the collection of fourspecies triticale totals more than 500 accessions. The working collection includes breeding accessions with manifestation of morphological traits of spelta. These forms have a long loose ear that is typical for spelta or squarehead wheat, awns of different length, spelta-like shape of glume etc. Some forms were beyond the variability range of parent components. They had traits which were not typical for source forms, notably dwarfism,  early ripeness etc.

Conclusions. Due to hybridization of threespecies triticale and spelta a working collection of fourspecies forms of triticale was formed of the progeny obtained. It includes more than 500 numbers, which were estimated by economic value and suitability for breeding improvement of triticale. The collection comprises unique recombinant forms of fourspecies triticale differing from one another by economically valuable characteristics, morpho-biological and biochemical traits. Fourspecies triticale with rye-wheat translocations was created. Gluten content in such forms is 24.8%, which is higher than that in other accessions, and they give yields equal to the standard. The result of crossing between threespecies triticale and spelta is the creation of 3 fourspecies triticale cultivars, of which Alkid is listed in the National Register of Plant Varieties suitable for dissemination in Ukraine, and Taktik and Strateg cultivars are submitted for the state registration (application Nos 15022003 and 15022004).

Keywords

fourspecies triticale, threespecies triticale, spelta, accessions