Statistical Methods in Phytogeography [stub]

Geo. D. Fuller
1914 Botanical Gazette  
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more » ... out Early Journal Content at http://about.jstor.org/participate--jstor/individuals/early-journal--content. JSTOR is a digital library of academic journals, books, and primary source objects. JSTOR helps people discover, use, and build upon a wide range of content through a powerful research and teaching platform, and preserves this content for future generations. JSTOR is part of ITHAKA, a not--for--profit organization that also includes Ithaka S+R and Portico. For more information about JSTOR, please contact support@jstor.org. 19I4] CURRENT LITERATURE 539 dark green plants of Melandrium are XXZZYYNN. This was shown by crosses between two light green types, chlorine and pallida. The F1 generation was the typical dark green, while the F2 generation consisted of dark green and light green in the ratio 9:7. Among the light green individuals both chlorine and pallida plants could be recognized, but just what characters the plants with the formula XXZZyynn possessed was not determined. Three cases of non-mendelizing leaf variegation are also described: i. This case of variegation was a chimera made up of typical dark green and of pure white areas. Seed from green branches or from white branches produced progeny exactly like the mother, no matter what characters were possessed by the male parent. 2. These plants are called chlorinomaculata, because they are dark green spotted with the "chlorina" type of green. The transmission of their characters is not yet entirely clear. The progeny of a female plant crossed with pollen from flowers of different colored branches gave the following results: from variegated branches came green, variegated, and chlorophyll-free plants; from green branches came only green plants; and from chlorine branches came only chlorophyll-free plants. 3. These plants were of the yellowish aurea type. They were crossed with many other forms, but the results are somewhat complex, and the author does not commit himself definitely on their analysis. He thinks that possibly this may be a case of infectious chlorosis. He says: "While chlorosis of Abutilon and other Malvaceae is transmitted neither through the male nor the female gametes, this aurea character is carried by a part of the gametes of both kinds." It seems to the reviewer that if this phenomenon is indeed one of infectious chlorosis, the small number of aurea plants of the filial generations might easily be due to reinfection.-E. M. EAST.
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