Abstract
A comparative study of the number and distribution of chromocentres in interphase nuclei and mean chiasma frequency at diakinesis has been made in three varietal populations of radish (Raphanus sativus L.), “Scarlet Globe”, “Japanese White” and “Chinese White”. The study showed a significant difference between the varietal populations in mean chiasma frequency and number of chromocentres (P<0.001), indicating that these nuclear characters are genotypically controlled. The correlation analysis revealed a significant negative correlation between chromocentres and chiasma frequency (r= -0.87). It was concluded that an increase in the amount of constitutive heterochromatin, as inferred by chromocentre counts, adversely affects the chiasma frequency and, consequently, genetic recombination in radish.
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References
Crowley, J.G.: Chiasma frequency and longevity in Lolium multiflorum. Heredity 24, 181–188 (1969)
Dayal, N., Kumar, S., Prasad, C.: Heterochromatin in the first inbred generation of radish (Raphanus sativus L.). Curr. Sci. 50, 29–30 (1981)
Hillel, J.M., Feldman, W., Simchen, G.: Mating systems and population structure in two closely related species of the wheat group. I. Chiasma frequency and population structure. Heredity 31, 1–9 (1973)
Jones, R.N.: B chromosome systems in flowering plants and animal species. Int. Rev. Cytol. 40, 1–100 (1975)
Lima-de-Faria, A., Jaworska, H.: Late DNA synthesis in heterochromatin. Nature (Lond.) 217, 138–142 (1968)
Merker, A.: The cytogenetic effect of heterochromatin in hexaploid triticale. Hereditas 83, 215–222 (1976)
Müntzing, A.: Accessory chromosomes. Ann. Rev. Genet. 8, 243–266 (1974)
Prasad, C.: Cytogenetic Investigations in Indian Radishes. Ph.D. Thesis, Ranchi University, Ranchi (1980)
Rees, H.: Genotypic control of chromosome form and behaviour. Bot. Rev. 27, 288–318 (1961)
Rees, H.: B chromosomes. Sci. Prog. 61, 535–554 (1974)
Rees, H., Ahmad, K.: Chiasma frequency in Lolium populations. Evolution 17, 575–579 (1963)
Sun, S., Rees, H.: Genotypic control of chromosome behaviour in rye. III. Unadaptive heterozygotes. Heredity 19, 357–367 (1964)
Thomas, J.B., Kaltsikes, P.J.: A possible effect of heterochromatin on chromosome pairing. Proc. nat. Acad. Sci. 71, 2787–2790 (1974)
Thomas, J.B., Kaltsikes, P.J.: The genomic origin of unpaired chromosomes in triticale. Canad. J. Cytol. Genet. 18, 687–700 (1976)
Verma, S.C.: Proximal localization of constitutive heterochromatin in the legume Lathyrus tingitanus. Nucleus (Calcutta) 21, 125–131 (1978)
Zecevic, L.M.: Cytogenetic studies of inbred lines in maize. I. Chiasma frequency at diplotene. Zbor radova Biol. Instt. 4, 1–32 (1960) (In Yugoslavian with English summary)
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Dayal, N., Prasad, C. & Kumar, L. Interrelationship between chromocentres and chiasmata in radish (Raphanus sativus L.). Chromosoma 85, 137–141 (1982). https://doi.org/10.1007/BF00344600
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DOI: https://doi.org/10.1007/BF00344600