Economical qualities of crosses between doubled haploid sugar beet lines

G. Kikindonov, Tz. Kikindonov, S. Enchev*

Agricultural Institute, 9700 Shumen, Bulgaria
(Manuscript received 14 May 2016; accepted for publication 23 June 2016)

Abstract. The gynogenesis of isolated in vitro ovules is a basic method for the receipt of haploid plants and doubled haploid forms of sugar beet. The
application of the induced haploidy is an excellent possibility for enrichment of the sugar beet gene fund and allows accelerated creation of highly homozygous
and genetically stable lines. Ten years field tests were conducted on the experimental fields of Agricultural Institute – Shumen to study the practical value of dihaploid monogerm and multigerm lines for the hybrid breeding of sugar beet. All the tested dihaploid lines formed higher root yields than their initial lines, maintained by classical methods. The monogerm dihaploid 150-4 and the multigerm tetrahaploid 48 combined that with proven higher sugar content. The
diploid hybrids of the monogerm dihaploid 150-4 and the multigerm dihaploid 58 lines realized the highest white sugar yields, significantly higher than the yield of the Standard varieties. The triploid hybrids of the monogerm dihaploid lines 54-4 and 150-4 and of the multigerm tetrahaploid 55 pollinator gave the highest white sugar yields, and could be presented to the State Agency for tests and certification as new Bulgarian sugar beet varieties.

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Stability of productiveness and technological qualities of diploid and triploid sugar beet varieties and hybrids

G. Kikindonov

Abstract. Sugar beet (Beta vulgaris var. saccharifera) is the culture used for crystal sugar production in the countries with moderate climate. It could be used as excellent succulent forage for ruminants and for preparation of sweet juice. Recently there has been an increasing interest in beets raw material for use in the bioethanol and biogas production. An assessment of the ecological plasticity of sugar beet varieties and hybrids has been made in the period 2008-2011. The tested diploid and triploid hybrids show stable high productivity in irrigation and non-irrigation conditions in different regions of the country, they are distinguished and uniform regarding the technological qualities.

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