Sjemenarstvo, Vol. 23 No. 5 - 6, 2006.
Pregledni rad
TOBACO SEED PRODUCTION IN CROATIA
Ankica Budimir
M. Boić
Snježana Bolarić
H. Šarčević
V. Konzumplik
Sažetak
In Croatia on a little over 6000 ha about 12 million kg of flue-cured and burley tobacco is produced annually. Mostly domestic varieties (F1 two line hybrids) are grown. The hybrids have been developed in collaboration between Faculty of Agriculture Zagreb and Croatian Tobaccos, P.C. Kutjevo. Mostly grown flue-cured hybrids are DH17, DH12,DH14 and K7, and burley hybrids BH2 and BH4. Seed production is done in the Croatian tobaccos, P.C. Kutjevo (continental climate, loamy soil). The hybrid parents are breeding lines of high yield and cured leaf quality, resistant to Potato virus Y (PVY). The seed production is based on CMS introduced into maternal line by back crossing. It is done in two phases; maintaining parental lines, and producing F1 hybrid seed by crossing the parental lines. Care is taken of discarding nornicotine converting mutants. Pollen used for the F1 hybrid seed is stored for one year at the temperature of -18 to -20°C prior to placing on the maternal parent stigmas. Hybridization is done from middle of July to middle of September. From flower fertilization till maturity of the seeds takes about one month and seed harvesting is finished by middle of October. The harvested seed (capsules) is dryed at 28 to 32°C prior to thrashing. After thrashing the seed is stored at a temperature of 5 to 10°C and air humidity of 30%. Seed is germinable over five years. For float system seedling production seed is pelleted and packed in canes where it can stay stored for over a year. The tobacco seed produced as described above has high germinability (>95%) and uniform germination.
Ključne riječi
tobacco; F1 hybrid; cytoplasmatic male sterility; pollen; seed
Hrčak ID:
17014
URI
Datum izdavanja:
1.2.2007.
Posjeta: 4.810 *