Seed yield and quality of late red clover variety 'Jogeva 205' and the relations of these indicators with growing time weather conditions from 1946 to 1995
2000
Bender, A. (Jogeva Plant Breeding Inst., Jogeva (Estonia)
Late red clover variety 'Jogeva 205' has been bred at Jogeva Plant Breeding Institute rom 1929 to 1940. The variety is still in use. Correlationsbetween the seed yield and quality indices of the breeder seed of variety 'Jogeva 205' and growing time weather conditions during 50 years are discussed in the current study. The potential seed yield capacity of the late red clover variety 'Jogeva 205' is high (600kg/ha), but realization of it depends to a great extent on weather conditions during growing and harvest time. With adverse weather conditions no management practice can assure satisfactory seed yield. Arising from that, the seed yield of late red clover variety 'Jogeva 205' may fluctuate about 200 times, irrespective of the growers' will, which is approximately 100 times more than for cereals. Need for creation of (state) seed reserve fund is determined by the amplitute of seed yield fluctuation of the species. The Republic of Estonia has created it for more important cereals, but unfurtunately it is still missing for forage legumes. As an average of 50 years late red clover 'Jogeva 205' yielded 191 kg of seed per hectare. Under Estonian conditions the likelihood of getting low seed yields (100 kg/ha) is 32 per cent, getting of satisfactory seed yields (100...250 kg/ha) is 38 per cent and getting of food seed yields (250 kg/ha) is 30 per cent. Low and high seed yields may occur in several years in sequence
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