Turkish Journal of Field Crops

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90 232 311 26 79

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2. Beyler İş Hanı, No: 313 Kat: 3 Konak-İzmir

DEVELOPMENT OF PVX RESISTANT POTATO BREEDING LINES USING MARKER-ASSISTED SELECTION

Ercan OZKAYNAK

Abstract

Potato breeding requires a long and laborious study as a based on phenotypic and genotypic selection studies due to its tetraploid and heterozygous plant structure. This research was made to show that the variety development can be faster with molecular assisted breeding. In this research, a short breeding program was applied in order to develop new varieties by taking high dry matter content and PVX resistance as the main criterion. The research was carried out between 2014-2019 and 16.000 F1 potato seeds were used as a genetic material. A hard and effective selection breeding, breeder field observation and PVX markers based on tuber and plant characteristics were selected. In this research, fresh market, French fry and chips variety candidates which have high dry matter content, PVX resistant and higher tuber yield compared to commercial varieties have been developed. According to the results of the research; special breeding programs with two selection criteria can be used to shorten the potato breeding time and commercial candidate varieties with superior properties can be developed. Superior lines that showed to be carrying the markers are strongly recommended to be used by breeders to develop new PVX extreme resistance potato varieties.

Keyword: Advanced line, genetic advance, potato clones, Solanum tuberosum L., tuber yield ,

Effects of Different Water Stress Levels on Biomass Yield and Agronomic Traits of Switchgrass (Panicum virgatum L.) Varieties under Semi-Arid Conditio

Erdal GONULAL, Suleyman SOYLU, Mehmet SAHIN

Abstract

A field experiment was conducted in the Wielkopolska region at the Gorzyń Research Station, Poland (52.34°N, 15.54°E) in Central Europe. The study was conducted over a 3-year period (2017, 2018, 2019) as a two-factorial design with four replications in the RCBD. The aim of the research was to determine the effect of the cultivar (‘Bolero’, ‘Tytan’) and the inoculation (Nitragina–seeds inoculation, Nitroflora I–seeds inoculation, Nitroflora II–soil inoculation, HiStick® Lupin–seeds inoculation) on plant development, seeds chemical composition and yielding of narrow-leaved lupin. The weather conditions and experimental factors significantly influenced on productivity of narrow-leaved lupin ‘Tytan’. Drought during the growing season reduced seeds and protein yields. After inoculation of HiStck the seeds yield was significantly greater by 12.4% (p < 0.01) and the protein yield after application of Nitroflora I or HiStick by 13.9% (p < 0.01) and 19.2% (p < 0.01), respectively. Correlation coefficients showed strong relations between number of pods and seeds per plant in both cultivars regardless of the inoculation variant, however the strongest relations in both cultivar were proved on HiStick treatment.
Keyword: Biological nitrogen fixation, chemical composition, legumes, protein efficiency, yielding