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ESTIMATION OF FERTILITY RESTORERS OF WINTER RYE BY THE COMPLEX OF VALUABLE TRAITS

ESTIMATION OF FERTILITY RESTORERS OF WINTER RYE BY THE COMPLEX OF VALUABLE TRAITS

Institution

Section

SOURCES AND DONORS

Abstract

Goal. To estimate fertility restorers by trait complex and to identify among them valuable sources of traits. Based on the data obtained, to submit accessions of winter rye restorers to the National Centre of Plant Genetic Resources of Ukraine for registration.

Results and Discussion. Fertility restorers were assessed by a complex of valuable traits: pollen-forming ability, viability and pollen fertility, restoring capacity, winter hardiness, lodging resistance, and yield capacity. Based on the study results, it was found that fertility restorers had high restoring ability. We distinguished 4 accessions (L 932073 V, L 063491 V, L 022219 V, Pamyat Khudoerka) with the highest level of this trait.

The pollen amount per anther in the test fertility restorers was determined. We identified 2 accessions with the highest level of this triat. A substantial variation in the pollen-forming ability of plants within accessions was observed. By this trait, we distinguished 3 accessions: (L 931149 V, L 052604 V, Pamyat Khudoerka), one of them (L 931 149 V) significantly exceeded the standard.

Most of restorers had a high viability and pollen fertility. By the pollen viability, we distinguished 3 accessions (L 933464 V, L 052604 V, L 022219 V). Four accessions (L 933464 V, L 931149 V, L 022219 V, Pamyat Khudoerka) had the highest fertility. 

All the fertility restorers studied were characterized by high winter hardines and short stem. The yield capacity of restorers was determined, and 5 accessions with a high level of this trait were distinguished (L 932073 V, L 933464 V, L 052604 V, Stoir, Pamyat Khudoerka). Having studied fertility restorers by valuable traits of plant productivity plants, we revealed that expression of the traits of "productive tillering", "ear length", "grain number in the main ear", "grain weight in the main ear", "grain number per plant", "grain weight per plant", and "1000-grain weight" varied considerably within accessions. The minimum and maximum values of these traits were determined. The best accessions by the traits studied were identified.

The data on the general combining ability by the yield capacity are presented. It was established that GCA ranged within accessions and from year to year. We distinguished fertility restores with high GCA (L 041736 V, L 90689 V), which was stable over the study years.

Conclusions. It was found that high GCA the yield capacity, regardless of weather conditions, was manifested in low-yielding lines L 041736 V and L 90689 V. Among fertility restores, lines L 933464 V and L 931149 V were noticeable by complex of valuable traits and recommended for use in winter rye breeding for heterosis. Line L 90689 V was chosen as the standard of low manifestation of the traits to investigate other lines - fertility restorers in further breeding work. Based on the study results, accessions L 041736 V, L 90689 V, L 933464 V, and L 931149 were transferred to the National Centre of Plant Genetic Resources of Ukraine for registration.

Keywords

winter rye, fertility restores, accessions, valuable traits