Abstract
Plants having a single genome are known as haploids. Alternatively, haploid plants also are defined as those that have the gametic number of chromosomes. However, in the case of a polyploid species like alfalfa (Medicago sativa L.), a tetraploid with 2n = 4x = 32, haploid plants actually are true diploids with two homologous sets of chromosomes (2n = 2x = 16). As far as we know, true haploid (or “monoploid”; 2n = lx = 8) forms of alfalfa have not yet been reported. We will refer to “haploid” alfalfa plants derived directly from a tetraploid plant through halving the number of genomes, resulting in 2n = 2x = 16, as dihaploids. The term “diploid” will be used to refer to naturally occurring M. sativa with 16 chromosomes.
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Skinner, D.Z., Liang, G.H. (1996). Haploidy in alfalfa. In: Jain, S.M., Sopory, S.K., Veilleux, R.E. (eds) In Vitro Haploid Production in Higher Plants. Current Plant Science and Biotechnology in Agriculture, vol 25. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-1858-5_19
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DOI: https://doi.org/10.1007/978-94-017-1858-5_19
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