Crosses made between tetraploid and diploid, 2n pollen-producing species directly transfer from one-half to the entire diploid genome from the diploid to the tetraploid level, depending on the mechanism of 2n pollen formation and the amount of crossing-over that occurs. Tetraploid plants that result from tetraploid x diploid hybridizations can be further utilized in a breeding program. It is postulated that preferential pairing between homologous chromosomes derived from the original tetraploid or diploid parent occurs in the tetraploid x diploid hybrid. Depending on the genetic divergence of the species involved, preferential pairing of homologous chromosomes may range from zero to one. Theoretical estimates of the amount of preferential pairing and the standard errors of these estimates are derived for cases where the diploid parent produces 2n gametes by either a first division or a second division restitution mechanism.
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Bingham ET (1979) Maximizing heterozygosity in autotetraploids. In: Lewis E (ed) Polyploidy: biological relevance. Plenum Press, New York, pp 471–489
Carroll CP, Borrill M (1966) Tetraploid hybrids from crosses between diploid and tetraploid Dactylis and their significance. Genetica 36:65–82
DeJong H, Tai GCC (1977) Analysis of tetraploid-diploid hybrids in cultivated potatoes. Potato Res 20:111–121
DeJong H, Tai GCC, Russell WA, Johnston GR, Proudfoot KG (1981) Yield potential and genotype-environment interactions of tetraploid-diploid (4x-2x) potato hybrids. Am Potato J 58:191–199
Diter A, Guyomard R, Chourrout D (1988) Gene segregation in induced tetraploid rainbow trout: genetic evidence of preferential pairing of homologous chromosomes. Genome 30:547–553
Elci S, Sybenga J (1976) Incomplete preferential pairing in a tetraploid Secale hybrid carrying translocations: multivalent configuration frequencies and marker segregation. Genetica 46:177–182
Herriott AB, Haynes FL, Shoemaker PB (1990) Inheritance of resistance to early blight disease in tetraploid x diploid crosses of potatoes. HortScience 25:224–226
Hougas RW, Peloquin SJ (1958) The potential of potato haploids in breeding and genetic research. Am Potato J 35:701–707
Mendiburu AO, Peloquin SJ (1977) The significance of 2n gametes in potato breeding. Theor Appl Genet 49:53–61
Mendiburu AO, Peloquin SJ (1979) Gene-centromere mapping by 4x-2x mating in potatoes. Theor Appl Genet 54: 177–180
Mendiburu AO, Peloquin SJ, Mok DWS (1974) Potato breeding with haploids and 2n gametes. In: Kasha KJ (ed) Haploids in higher plants. University of Guelph Press, Guelph, pp 249–258
Mok DWS, Peloquin SJ (1975) Three mechanisms of 2n pollen formation in diploid potatoes. Can J Genet Cytol 17:217–225
Okwuagwu CO, Peloquin SJ (1981) A method of transferring the intact parental genotype to the offspring via meiotic mutants. Am Potato J 58: 512–513
Parrott WA, Smith RR, Smith MM (1985) Bilateral sexual polyploidization in red clover. Can J Genet Cytol 27:64–68
Peloquin SJ (1981) Chromosomal and cytoplasmic manipulations. In: Frey KJ (ed) Plant breeding II. Iowa State University Press, Ames IA, pp 117–150
Peloquin SJ (1982) Meiotic mutants in potato breeding. Stadler Symposium, vol 14. University of Missouri, Columbia, pp 99–109
Peloquin SJ, Hougas RW, Gabert AC (1966) Haploidy as a new approach to the cytogenetics and breeding of Solanum tuberosum. In: Riley R, Lewis KR (eds) Chromosome manipulations and plant genetics. Oliver and Boyd, Edinburgh, pp 21–28
van Santen E, Casler MD (1990) Forage quality and yield in 4x progeny from interploidy crosses in Dactylis L. Crop Sci 30:35–39
Stebbins GL Jr (1947) Types of polyploids: their classification and significance. Adv Genet 1:403–429
Stephens SG (1950) The internal mechanism of speciation in Gossypìum. Bot Rev 16:115–149
Sybenga J (1988) Mathematical models for estimating preferential pairing and recombination in triploid hybrids. Genome 30:745–757
Tai GCC (1982) Estimation of double reduction and genetic parameters in autotetraploids. Heredity 49:63–70
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Haynes, K.G., Potts, W.E. & Camp, M.J. Estimation of preferential pairing in tetraploid x diploid hybridizations. Theoret. Appl. Genetics 81, 504–508 (1991). https://doi.org/10.1007/BF00219440
- 2x hybridization
- 2n gametes
- Preferential pairing