Abstract
An interspecific hybridization study has been carried out between seven diploid species of Lotus (L. alpinus Schleich., L. japonicus (Regel) Larsen, L. filicaulis Dur., L. schoelleri Schweinf., L. krylovii Schischk. and Serg., L. tenuis Waldst. et Kit., and L. corniculatus var. minor Baker) closely related to L. corniculatus L. A total of 139 interspecific hybrids were produced in 16 combinations of the 7 species. Nine of these crosses were produced for the first time and four were obtained by means of embryo-culture. The growth habit, number of florets per umbel, flower color expression, HCN reaction and 15 metrical traits were compared between parents and hybrids. The relative case with which some hybrids were produced suggested that during the early evolutionary history of the genus species diversification could have originated through interspecific hybridization and subsequent gene differentiation. In some crosses, the hybrids resembled one parent more closely than the other. This close morphological affinity between the hybrids and one of their parents would make it extremely difficult to detect such hybrids in natural populations and probably aceounts for the prevailing belief that there is little or no hybridization in nature.
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References
Bent F. S. (1962). Interspecific hybridization in the genus Lotus. Can. J. Genet. Cytol. 4: 151–159.
Bubar J. S. (1958). An association between variability in ovule development within ovaries and self-compatibility in Lotus (Leguminosae). Can. J. Botany 36: 67–72.
Dawson C. D. R. (1941). Tetrasomic inheritance in Lotus corniculatus L. J. Genet. 42: 49–72.
de Nettancourt D., & W. F. Grant (1963). The cytogenetics of Lotus (Leguminosae) II. A diploid interspecific hybrid between L. tenuis and L. filicaulis. Can. J. Genet. Cytol. 5: 338–347.
de Nettancourt D., & W. F. Grant (1964a). The cytogenetics of Lotus (Leguminosae). VI. Additional diploid species crosses. Can. J. Genet. Cytol. 6: 29–36.
de Nettancourt D., & W. F. Grant (1964b). Gene inheritance and linkage relationships in interspecific diploid hybrids closely related to Lotus corniculatus L. Can. J. Genet. Cytol. 6: 277–287.
Gillett J. B. (1958). Lotus in Africa south of the Sahara (excluding the Cape Verde Islands and Socotra) and its distinction from Dorycnium. Kew Bull. 3: 361–381.
Grant W. F., M. R. Bullen, & D. de Nettancourt (1962). The cytogenetics of Lotus. I. Embryo-cultured interspecific diploid hybrids closely related to L. corniculatus. Can. J. Genet. Cytol. 4: 105–128.
Keim, W. F. (1952). Interspecific hybridization studies in Trifolium and Lotus utilizing embryo-culture techniques. Ph.D. thesis, Cornell University, Ithaca, N.Y., U.S.A.
Larsen K. (1958). Cytotaxonomical studies in Lotus. IV. Some cases of polyploidy. Botan. Tidsskr. 54: 44–56.
MacDonald, H. A. (1946). Birdsfoot trefoil (Lotus corniculatus L.). Its characteristics and potentialities as a forage legume, Cornell Univ. Agr. Exp. Sta. Mem. No. 261.
Mears, K. P. (1955). Studies in species hybridization in the genus Lotus. M.Sc. thesis, Univ. of Vermont, Vt., U.S.A.
Ottley A. M. (1944). The American Loti with special consideration of a proposed new section, Simpetraca. Brittonia 5: 81–123.
Stebbins G. L. (1959). The role of hybridization in evolution. Proc. Amer. Phil. Soc. 103: 231–251.
Somaroo, B. H. (1970). A cytogenetic study of interspecific diploid hybrids and amphidiploids in the genus Lotus. Ph.D. thesis, McGill Univ., Montreal, Canada.
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Somaroo, B.H., Grant, W.F. Interspecific hybridization between diploid species of Lotus (Leguminosae) . Genetica 42, 353–367 (1971). https://doi.org/10.1007/BF00123329
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DOI: https://doi.org/10.1007/BF00123329