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Journal Article

The Behavior of the Chromosomes in Oenothera lata x O. gigas

Reginald Ruggles Gates
Botanical Gazette
Vol. 48, No. 3 (Sep., 1909), pp. 179-199
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Page Count: 24
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1. O. lata x O. gigas has 21 chromosomes in its somatic cells, 7 of maternal origin (O. lata) and 14 of paternal origin (O. gigas). In one individual the number was 20, owing probably to the absence of one chromosome from one of the germ cells which produced this individual. 2. These chromosomes segregate at the time of reduction, so that in individuals having 21 chromosomes half the germ cells receive 10 and half 11 chromosomes. In the individual having 20 chromosomes, 10 enter each germ cell. Occasionally one chromosome goes to the wrong pole of the spindle, so that in plants having 21 chromosomes a few germ cells are found having 9 or 12 chromosomes and in the plant with 20 chromosomes, occasional germ cells have 9 or 11 chromosomes. This irregularity in chromosome distribution accounts for the fact that different individuals in a race in some cases have different numbers of chromosomes. 3. The 10-11 segregation of chromosomes in the formation of the germ cells of this hybrid shows that there is not here a pairing and separation of homologous chromosomes of maternal and paternal origin, but that the segregation tends to be into two numerically equal groups. 4. Evidence from this and other work shows that there are two general methods of chromosome reduction in plants, one involving a side-by-side pairing of chromatin threads (parasynapsis) to form a double spirem; the other involving an end-to-end arrangement (telosynapsis) of the maternal and paternal chromosomes to form a single spirem, which may afterward split longitudinally. 5. The behavior of the chromosomes in Oenothera supports the view of their genetic continuity from generation to generation, the number present in any individual being always the sum of the chromosomes in the germ cells from which that individual was formed. 6. If the chromosomes of Oenothera are unlike in their hereditary capacities their behavior furnishes a not improbable basis for the phenomena of mutation in Oenothera Lamarckiana. But it remains to be proven that the chromosomes of Oenothera are of unequal hereditary value.

Notes and References

This item contains 44 references.

  • 1
    This reference contains 4 citations:
    • DEVRIES in a footnote to a recent paper (5
    • BOVERI 4
    • LILLIE 23
    • ROSENBERG 31
  • 2
  • 3
    ROSENBERG (32) in Hieracium excellens
  • 6
    WILSON (36).
Literature Cited
  • 1
    ALLEN, C. E., Nuclear division in the pollen mother cells of Lilium canadense. Annals of Botany19: 189-258. pIs. 6-9. 1905.
  • 2
    BERGHS, J., Le fuseau heterotypique dc Paris quadrifolia. La Cellule22: 2032I4. pis. 2. 1905.
  • 3
    BOVERI, T., Ergebnisse über die Konstitution der chromatischen Substanz des Zellkerns. pp. 130. figs. 75. Jena. 1904.
  • 4
    — Zellen Studien V. Ueber die Abhängigkeit der Kerngrösse und Zellenzahl des Seeigel-Larven von der Chromosomenzahl der Ausgangszellen. pp. 80. pIs. 2. figs. 7. Jena.
  • 5
    DEVRIES, H., Bastarde von Oenothera gigas. Ber. Deutsch. Bot. Gesells. 26a: 754-762. 1908.
  • 6
    EISEN, G., Spermatogenesis of Batrachoseps. Journ. Morph. 17: 1-II7. pis. I4. 1900.
  • 7
    ERDMANN, R., Experimentelle Untersuchung der Massenverhaltnisse von Plasma, Kern, und Chromosomen in dem sich entwickelnden Seeigelei. Arch. Zellforsch. 1:76-136. 1908.
  • 8
    GATES, R. R., Pollen development in hybrids of Oenothera lata x 0. Lamarc- kiana, and its relation to mutation. BOT. GAZETTE43:81-iI5. pIs. 2-4. 1907.
  • 9
    , Hybridization and germ cells of Oenothera mutants. BOT. GAZETTE 44:1-2I. figs. 3. 1907.
  • 10
    , The chromosomes of Oenothera. ScienceN. S.27: 193-195. I908.
  • 11
    - , A study of reduction in Oenothera rubrinervis. BOT. GAZETTE 46:1-34. pIs. I-3. I908.
  • 12
    GEERTS, J. M., Beitrage zur Kenntnis der cytologischen Entwicklung von Oenothera Lamarckiana. Ber. Deutsch. Bot. Gesells. 26a:608-614. 1908
  • 13
    GEERTS, J. M., Beitrage zur Kenntnis der Cytologie un(l der partiellen Ster- ilitat von Oenothera Lamarckiana. Recueil Trav. Bot. Néerl. 5:93-208. pls. 5-22. 1909.
  • 14
    GRÉGOIRE, V., ET WYGAERTS, A., La reconstruction du noyau et la formation des chromosomes dans les cineses somatiques. La Cellule21: 7-76. pIs. 1-2. 1903.
  • 15
    GRÉGOIRE, V., La structure de l'element chromosomique au repos et enl divi- sion dans les cellules veg6tales (racines d'Allium). La Cellule23:311-353. figs. 3. p/S. 2. 1906.
  • 16
    — La formation des gemini heterotypique dans les vegetaux. La Cel- lule24:369-420. p/s. 2. 1907.
  • 17
    JANSSENS, F. A., ET DUMEZ, R., L'element nucleinien pendant les cineses de maturation des spermatocytes chez Batrachoseps attenuatus et Pletodon cinereus. La Cellule20:421-460. p/s. 5. 1903.
  • 18
    JORDAN, HI. E., The spermatogenesis of Aplopus Mayeri. Carnegie Institu- tion Publ. I02. pp. 13-36. p/s. I-5. 1908.
  • 19
    LAWSON, A. A., Origin of the cones of the multipolar spindle in Gladiolus. BOT. GAZETTE30:145-153. pI. I2. I900.
  • 20
    , On the relationships of the nuclear membrane to the protoplast. BOT. GAZETTE35:305-319. p/S. I5. 1903-
  • 21
    , Studies in spindle formation. BoT. GAZETTE36:81-IOO. p/s. I1S7 I 6. I 904 .
  • 22
    LEWIS, I. M., The behavior of the chromosomes in Pinus and Thuja. Annals of Botany22:529-556. p/s. 29, 30. 1908.
  • 23
    LILLIE, F. R., Observations and experiments concerning the elementary phenomena of embryonic development in Chaetopterus. Journ. Exp. Zool. 3: 153-268. pI. I. figs. 78. 1906.
  • 24
    LUTZ, ANNE IXI., Notes on the first generation hybrid of Oenothera lataX 0. gigas. ScienceN. S.29:263-267. I909.
  • 24a
    MACDOUGAL, D. T., VAIL, A. M., AND SHULL, G. H., Mutations, variations, and relationships of the Oenotheras. Carnegie Institution Publ. 8i. pp. 92. p/s. 22. figs. 73. 1907.
  • 25
    MARÉCHAL, J., Sur l'ovogenese des S6laciens et de quelques autres Chordates. I. La Cellule24:7-239. p/s. I-II. 1907.
  • 26
    MONTGOMERY, T. H., The spermatogenesis in Pentatoma up to the formation of the spermatid. Zool. Jahrb. Anat. Ont. 12: 1-88. p/s. I-5. 1898.
  • 27
    — A study of the chromosomes of the germ cells of Metazoa. Trans. Amer. Phil. Soc. 20: 154-236. p/s. 4-8. 1901.
  • 28
    MORGAN, T. H., Sex determination and parthenogenesis in phylloxerans and aphids. ScienceN. S.29:234-237. I909.
  • 29
    MOTTIER, DAVID M., The development of the heterotypic chromosomes in pollen mother cells. Annals of Botany21:309-347. p/s. 27, 28. 1907.
  • 30
    OVERTON, J. B. On the organization of the nuclei in the pollen mother cells of certain plants with especial reference to the permanence of the chromo- somes. Annals of Botany23: 19-6I. p/s. I-3. 1909.
  • 31
    ROSENBERG, 0., Ueber die Tetradentheilung eines Drosera-Bastardes. Ber. Deutsch. Bot. Gesells. 22:47--53. pis. 4. 1904.
  • 32
    — Cytological studies on the apogamy in Hieracium. Botanisk Tids- skrift28: 143-I70. figs. I3. pIs. I, 2. 1907.
  • 33
    SCHAFFNER, JOHN H., The reduction division in the microsporocytes of Agave virginica. BOT. GAZETTE47: 190-2I4. pIs. 12-14. 1909.
  • 34
    STEVENS, N. M., Studies in spermatogenesis, with special reference to the accessory chromosome. Carnegie Institution Publ. 36.' pp. 32. pis. 7. 1908.
  • 35
    —A comparative study of the heterochromosomes in certain species of Coleoptera, Hemiptera, and Lepidoptera, with especial reference to sex deter- mination. Carnegie Institution Publ. 36.2 pp. 33-74. pis. 8-IS. 1906.
  • 36
    WILSON, E. B., Studies on chromosomes. IV. Journ. Exp. Zool. 6:84. 1909.
  • 37
    — Studies on chromosomes. V. The chromosomes of Metapodius. Journ. Exp. Zool. 6: 147-205. PI. I. figs. I3. 1909.
  • 38
    YAMANOUCHI, SHrGE]O, Sporogenesis in Nephrodium. BOT. GAZETTE45: 1- 30. pis. I-4. 1908.
  • 39
    — Mitosis in Fucus. BOT. GAZETTE47: 173-I97. pIs. 2-II. 1909.