EFFECTS OF GROWING CONDITIONS ON CROSSING SUCCESS IN DIFFERENT POTATO(Solanum tuberosum L.)CROSSES

Abstract

This study was carried out to determine the effect of growing conditions under
different altitudes on seed production in different potato crosses in Tokat Province
of Turkey in 2015. Plants were grown and crosses were made in open field or net
house in Tokat location (altitude 600 m asl.), open field or net house in Artova
location (altitude 1200 m asl.), or controlled polycarbonate greenhouse. Fifteen
different crosses were made between 12 parent cultivars. Production of hybrid
potato seed was considered “crossing success”. Results showed that parent
cultivars and cross combinations affected crossing success and no seeds were
produced from some combinations while some combinations produced abundant
seeds. The highest number of seeds were produced in controlled polycarbonate
greenhouse, whereas very low amount of seeds were produced under low altitude
(600 m asl.) open field conditions. Polycarbonate greenhouse produced 47.3% of
all seeds, while low altitude net house produced 19.8%, high altitude open field
produced 15.8%, high altitude net house produced 13.6% and low altitude open
field produced 3.5%. It was concluded that for a high crossing success, potato
crossing should be made by controlled polycarbonate greenhouse conditions and 23
C0 day / 17 C0 night temperatures produced more hybrid seeds.