Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://link.springer.com/doi/10.1007/BF02981763 below:

Cytological studies in cotton | Journal of Genetics

1. Of two interspecific hybrids between Asiatic and New World cottons studied, one had 2n = 39 and the other 2n = 52. For the latter, the inference is that a diploid egg from Asiatic cotton had functioned.

2. In a study of the somatic chromosomes of New World cotton it has been found that half of the chromosomes are small and the other half larger, the latter being comparable in size to the chromosomes of Asiatic cotton. The small chromosomes of New World cotton are of the same size as those in diploid wild species from North America. Species from the Old World and from Australia are all characterised by the larger size of their chromosomes.

3. In the first meiotic division it was seen that (1) at least 13 univalent chromosomes are present in both hybrids, and (2) the hybrid with 52 chromosomes shows the same chromosome conjugation as in a triploid Asiatic cotton, but with the addition of an extra set of 13 non-homologous chromosomes.

4. The conclusion was drawn that New World cottons are allopolyploid species. It is thought that these probably originated from a cross between two species ofGossypium both withn = 13 but possessing morphologically dissimilar and non-homologous sets of chromosomes. The inference is that one of the parental species was an Asiatic cotton or a very closely allied type, while the other was probably a New World species characterised by its smaller chromosomes.

This is a preview of subscription content, log in via an institution to check access.

Springer+ Basic

€34.99 /Month

• Get 10 units per month
• Download Article/Chapter or eBook
• 1 Unit = 1 Article or 1 Chapter
• Cancel anytime

Price includes VAT (Germany)

Instant access to the full article PDF.

Institutional subscriptions

• Darlington, C. D. (1931). “Meiosis.”Biological Reviews,6, 221–64.

  Article  Google Scholar 

• Gates, R. R. andThomas, N. (1914). “A cytological study ofOenothera mut.lata andOc. mut.semilata in relation to mutation.”Quart. Journ. of Mic. Sci.59, 523–71.

  Google Scholar 

• Hagerup, O. (1932). “Über Polyploidie in Beziehung zu Klima, Ökologie und Phylogenie.”Hereditas,16, 19–40.

  Google Scholar 

• Harland, S. C. (1932). “Fertility in hybrids between New and Old World cottons.”Nature,129, 398.

  Article  Google Scholar 

• Hutchinson, J. B. (1932). “The genetics of cotton. Part VIII. The inheritance of anthocyanin pigmentation in Asiatic cottons.”Journ. Gen.26, 317–39.

  Article  Google Scholar 

• Johansen, D. A. (1932a). “A new method of differentiating Gentian Violet when used as a somatic chromosome stain.”Stain Technology,7, 17–20.

  CAS  Google Scholar 

• —— (1932b). “Further notes on the use of Gentian Violet as a somatic chromosome stain.” Ibid.,7, 107.

  Google Scholar 

• Lewitsky, G. A. (1931). “The morphology of the chromosomes.”Bull. Appl. Bot., Genet. and Plant Breed.27, 103–74.

  Google Scholar 

• Longley, A. E. (1933). “Chromosomes inGossypium and related genera.”Journ. Agric. Research,46, 217–27.

  Google Scholar 

• Meurman, O. (1928). “Cytological studies in the genusRibes L.”Hereditas,11, 289–356.

  Google Scholar 

• Müntzing, A. (1932). “Cyto-genetic investigations on syntheticGaleopsis Tetrahit.” Ibid.,16, 105–54.

  Article  Google Scholar 

• Nakatomi, S. (1931). “Hybridization between Old World and New World cotton species and the chromosome behavior of the pollen mother-cells in theF₁ hybrid.”Jap. Journ. Bot.5, 371–84.

  Google Scholar 

• Rosenberg, O. (1909). “Cytologische und morphologische Studien anDrosera longifolia × rotundifolia.”Kungl. Svenska Vetenskapsakademiens Handlingar,43, No.II, 1909.

  Google Scholar 

• Skovsted, A. (1929). “Cytological investigations of the genusAesculus L.”Hereditas,12, 64–70.

  Google Scholar 

• —— (1933). “Cytological studies in cotton: I. The mitosis and the meiosis in diploid and triploid Asiatic cotton.”Ann. Bot. 47, 227–51.

  Google Scholar 

• Szymanek, J. (1932). “Observations caryologiques supplémentaires sur quelquesGossypium.”C.R. de l’Académie des Sciences, Paris, 1932,194, 1011–13.

  Google Scholar 

• Szymanek, J. andGavaudan, P. (1932). “Observations caryologiques sur quelquesGossypium.” Ibid., 1932,194, 123–5.

  Google Scholar 

• Winge, Ö. (1917). “The chromosomes. Their numbers and general importance.”C.R. des Travaux du Lab. Carlsberg,13, 131–275.

  Google Scholar 

• —— (1932). “On the origin of constant species-hybrids.”Svensk Bot. Tidskrift,26, 107–22.

  Google Scholar 

• Zhurbin, A. J. (1930). “Chromosomen beim BastardG. herbaceum × G. hirsutum.” AusN. J. H. J. No. 5, Taschkent 1930. Cited from H. Emme,Der Züchter, 1932, pp. 9–18 and 39–49.

Download references

1. Cotton Research Station, Empire Cotton Growing Corporation, Trinidad, B.W.I.

   A. Skovsted

Skovsted, A. Cytological studies in cotton. Journ. of Genetics 28, 407–424 (1934). https://doi.org/10.1007/BF02981763

Download citation

• Issue Date: March 1934

• DOI: https://doi.org/10.1007/BF02981763

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4