Open Access Research Paper Views (944) Tetraploid monogerm lines as maternal components of sugar beet hybrids Georgi Kikindonov, Stanimir Enchev Int. J. Biosci. 8(5), 212-218, May 2016. DOI: http://dx.doi.org/10.12692/ijb/8.5.212-218 Keywords: Male sterility, Monogerm, Productivity, Sugar beet, Tetraploids Details