Sisäkkäisjyvistä eri kauralajikkeilla ja niiden vaikutuksesta siementavaran puhtauteen

Authors

• Meri Jokela Valtion siementarkastuslaitos, Helsinki

DOI: https://doi.org/10.23986/afsci.71553

Abstract

This study of double grains included all oats varieties at present common in the seed trade in Finland. The material consisted of seed samples sent to the State Seed Testing Station for official testing and covered the years 1959 and 1960. The vegetation period 1959 was exceptionally dry in Finland. The results of the study are presented in the Table. The number of double grains in the seed lots of each variety was greater in the yield of 1959 than in that of 1960, but the relative order of the varieties was the same in each year. The number of double grains was highest in the seed lots of the variety Tammi and lowest in the seed lots of the variety Sisu, in which the double grains were relatively uncommon. Variation between the different samples of the same variety was great. The quantity of sterile florets attached to the double grains was on an average relatively small in weight even in the seed lots of the varieties with a great number of double grains. But in some seed lots, especially of the varieties Tammi and Pendek, the weight of the sterile florets was great enough to be of practical value in judging the purity of seed.