SUGAR CONTENTS OF STALK JUICES IN SWEET SORGHUM TYPES

Several solutions are available for the replacement of fossil fuels; one is bioalcohol, Bioethanol can be utilized as fuel alone or mixed with petrol. Its by-products are also can be utilized (Sipos et al., 2007). For its production, plants with high sugar or starch content can be used, e. g. sugar cane, corn kernel (Voca et al., 2007) or sorghum. Juice pressed from the stalk of sugar sorghum has high sugar content (14-17%) that makes it suitable for bioethanol production. During our experiment, we examined 53 restorer male lines; among them 22 were silo type sugar sorghum. We studied the following traits stalk of juice, stalk of content. According top character available from stalk by pressing, we selected six restorer male lines for studies in the forthcoming years: RL 12, RL 4, RL 5, RL 18, RL 15, RL 9. Their stalk medullas were wet, stalk diameters were medium-thick, sugar contents of juices varied between 17 and 24% at the end of milk mature. Harvest was made in September, they can be classified into early maturation group. Male sterile female lines were the following: SL 1, SL 2, SL 3, SL 4, SL 5. The concern male lines were: CL 1, CL 2, CL 3, CL 4, CL 5. Sugar contents of these lines were close to average, SL I was the earliest crossing partner. In Hungary, there are only a few restorer female lines, so we will use these lines for hybrid production during the next years.