2025 Volume 71 Issue 1 Pages 1-4
The Shinshu University rye breeding team, to which the authors belong, has developed two extremely-early-maturing lines, ‘SUR-10’ and ‘SUR-12’. The purpose of this study was to compare their feed composition characteristics with commercial varieties of the same maturity. From the field tests for two consecutive seasons from 2018-2019, the two lines were found to show: (1) earlier maturity than any commercial varieties, (2) lower plant height, (3) lower OCW, (4) equivalent or higher values in Oa/OCW, enzymatic digestible OM (EDOM=OCC+Oa) of digestible components, and estimated TDN content, suggesting that the two lines have better feed characteristics than conventional varieties of the same maturity. In the future, the two lines will be introduced widely to improve not only feed productivity but also quality in double cropping systems in some Japanese regions.
