Summary
A tetraploid annual male sterile form of Beta vulgaris L. (2n=4x=36) was crossed with the wild beet species Beta intermedia Bunge (2n=36). The resulting F1-plants were male sterile annuals being two or three times back-crossed to diploid and tetraploid sugar and fodder beets in the next years. Apart from tetraploid material (36 chromosomes) hexaploid (54 chromosomes) and a number of aneuploid plants developed.
The results obtained justify the conclusion that, at a tetraploid level the material mostly propagates apomictically after the F1 generation. The presence of penta-, hexa-, septa-and even octaploid plants might be explained by assuming that no meiosis has taken place in the crossing partners. Triploid plants are sometimes found in the progeny of hexaploid material and may presumably be considered haploids. Moreover some pentaploid plants were found in the progeny of the open pollinated F1 which after two generations of bagging are still pentaploids although they produce no pollen. This is another clear indication of apomictic reproduction.
The tetraploid generation from the cross between the hexaploid material and diploid sugar beets probably contains the best prospects for breeding.
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References
Barocka K. H., 1966. Die Sektion Corollinae der Gattung Beta (Tournef.) L. Z. PflZücht. 56 (4): 379–388.
Ernould L., 1951. Les possibilités de la lutte contre la Jaunisse de la betterave. Publs Inst. belge Amélior. Better. 19 (3): 71–138.
Krasochkin V. T., 1959. Obzor vidov roda Beta. Trud\-y prikl. Bot Genet. Selek. 32 (3): 3–36.
Oldemeyer R. K. and H. E. Brewbaker, 1956. Interspecific hybrids in the genus Beta. J. Am. Soc. Sug. Beet Technol. 9 (1): 15–18.
Walther F., 1963. Untersuchungen an Wildrüben in der Turkei; Cytologische Untersuchungen an Wildrüben im Gebiet von Eskisehir. Z. PflZücht. 49 (2): 173–180.
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Cleij, G., de Bock, T.S.M. & Lekkerkerker, B. Crosses between Beta intermedia bunge and B. vulgaris L.. Euphytica 17, 11–20 (1968). https://doi.org/10.1007/BF00038961
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DOI: https://doi.org/10.1007/BF00038961