Some properties of double cross hybrids of rye.

The study presents a formula of producing double cross hybrids of rye. The aim of the research was a generation of double and three way cross hybrids by using the same female parents and comparing chosen properties of them. The subject of the research were ten double cross hybrids, ten three way cross hybrids, two male parents and three standard varietes. The field trials were conducted in two places (Smolice, Rogo±ewo). A statistical analysis showed that grain yield of double cross hybrids was significantly higher than grain yield of three way cross hybrids. Both types of the hybrids did not differ in plant height and lodging resistance indeed.