Study on the Reproductive Potential of Diploid and Tetraploid Red Clover (Tr. pratense L.) Cultivars under the Conditions of the Central Balkan Mountains

G. GORANOVA and Tz. MIHOVSKI
Research Institute of Mountain Stockbreeding and Agriculture, BG - 5600 Troyan, Bulgaria

Abstract

GORANOVA, G. and Tz. MIHOVSKI, 2005. Study on the reproductive potential of diploid and tetraploid red clover (Tr. pratense L.) cultivars under the conditions of the Central Balkan Mountains. Bulg. J. Agric. Sci., 11: 141-145

From 2000 to 2002 a comparative assessment was conducted on the reproductive potential and the elements that determine it of the following diploid and tetraploid cultivars of red clover: KS-1 (reference), Formica, Milvus, Renova (2n), Temara, Vanessa, Barfiola, Tedi (4n).
Under the growing conditions of the Central Balkan Mountains the tetraploid red clover cultivars performed far worse than the diploid ones regarding their reproductive potentials. The amount of generative stems per unit of nutritive area and the flowers' fertility (both of which are seed yield elements) had lower values for the tetraploid varieties. The diploid cvs. Formica, Milvus and Renova had lower seed yield than the reference cv. KS-1. Their propagation will be worthwhile when the growing conditions allow for the realization and utilization of their specific forage cultivar characteristics.

Key words: red clover, Tr. pratense, tetraploid, Central Balkan Mountains, diploid