Summary
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1.
The occurrence of relative chlorophyll deficiency in crosses betweenG. barbadense andG. hirsutum is shown to be dependent upon three pairs of factors, probably independently inherited, which are designated as follows:
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2.
Modifying factors considerably affect the distribution of chlorophyll deficiency in the chlorophyll-deficient class, and within it was found a range from completely lethal to fully viable.
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3.
The distribution of the chlorophyll-deficient factors was investigated inG. barbadense, G. hirsutum andG. tomentosum. G. barbadense carried only Cha.G. hirsutum always carried Chb, but Chc was found in all three phases of the gene—ChcChc, Chcchc and chcchc.G. tomentosum carried the combination Cha and Chb.
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References
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Harland, S. C. (1929a). “The genetics of cotton. Part I. The inheritance of Petal Spot in New World cottons.”J. Gen. xx, 365.
—— (1929b). “The genetics of cotton. Part II. The inheritance of pollen colour in New World cottons.” Ibid. xx, 387.
—— (1929c). “The genetics of cotton. Part III. The inheritance of corolla colour in New World cottons.” Ibid. xxi, 95.
Kristofferson, K. B. (1924). “Contributions to the genetics ofBrassica oleracea.”Hereditas, v, 297.
Leake, H. M. (1911). “Studies in Indian cottons.”J. Gen. i, 205–272.
Stroman, G. N. andMahoney, C. H. (1925). “Heritable chlorophyll deficiencies in seedling cotton.”Texas Agr. Expt. Sta. Bull. No. 332, 20 pp. illus.
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Harland, S.C. The genetics of cotton. Journ. of Genetics 25, 271–280 (1932). https://doi.org/10.1007/BF02984591
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DOI: https://doi.org/10.1007/BF02984591