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FORMATION AND COMPOSITION OF THE COLLECTION OF SLEF-POLLINATED MAIZE LINES BY PRODUCTIVITY

FORMATION AND COMPOSITION OF THE COLLECTION OF SLEF-POLLINATED MAIZE LINES BY PRODUCTIVITY

Institution

Section

COLLECTION FORMATION AND USE

Abstract

Goal. To create a of self-pollinated maize lines by productivity; to investigate peculiarities of formation of high productivity in lines from different ripeness groups; to select accessions with high values of productivity components (grain number per ear, ear number per plant, 1000-kernel weight).

Results and Discussion. The article presents achievements of the Laboratory of Maize Breeding and Seed Production of the Plant Production Institute nd. a. V. Ya. Yuryev in the creation of a collection of self-pollinated maize by productivity. The collection includes 99 accessions, which belong to mid-early, mid- ripe and mid-late ripeness groups and are highly resistant to blister smut. The mid-ripe group is the largest, including 72 accessions. It was found that high productivity in mid-ripe lines was formed due to strong expression of the traits of “grain number  per ear” and “1000-kernel weight” with small ear numbers per plant (UKh 878, UKhS 7, UKhS 87, Kharkovskaya 246, Kharkovskaya 648, and others). The high productivity in mid-late lines is determined by combination of great kernel numbers per ear with medium values of 1000-kernel weight and ear numbers per plant (Kharkovskaya 155, UKh 75, UKhL 226, Kharkiovskaya 38 and others).

Conclusions. We identified accessions that are sources of great kernel numbers per ear (UKhS 878, Kharkovskaya 646, UKhS 29, UKh 722, Kharkovskaya 155 and others); high 1000-kernel weight  (UKhS 9, UKhS 88, Kharkovskaya 634, Kharkovskaya 648, UKhS 75 and others); increased ear numbers per plant (Kharkovskaya 230, UKhS 13, UKh 1009, UKhS 60 and ohters). Mid-late high-yielding line Kharkovskaya 230 (148 g/kernel per plant) with 2 ears was distinguished. Ten accessions that combine high productivity with high levels of its components (kernel number per ear, 1000-kernel weight) were selected.

            It was stressed that collection accessions were valuable material for further involvement in breeding programs. Use of this collection will contribute to successful selection of source material for creation of high-yielding maize hybrids, which will meet current requirements of agribusiness.

            The collection of self-pollinated maize lines created in the Laboratory of Maize Breeding and Seed Production was registered in the National Centre of Plant Genetic Resources of Ukraine of the Plant Production Institute nd. a. V. Ya. Yuryev of NAAS.

Keywords

collection, maize, accession, self-pollinated line, productivity