A new gene "Crumpled 4" to link with a gene for speckled flowers in Pharbitis Nil
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概要
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As a well-known character in Pharbitis Nil, we find a crumpled leaf which is uneven on the surface, frequently rolling up on the brim. In common cases this character behaves as a recessive to normal. These are, crumpled-1 (c1) in the variegated linkage group, crumpled-2 (c2) in the delicate linkage group found by Imai, and crumpled-3 (c3) in the cordate linkage group found by the author.A new gene, crumpled-4 (c4) for this character, is studied in the present paper. Crossing experiments have shown the results that the gene links respectively to white flower (c) with the recombination frequency 31.4%, and to speckled (sp1) with 31.2%. Both frequencies should be nearly equal because of having a close linkage between c and sp1.According to the author's previous studies, white flower (c) links to a gene r of other white flower with 24.6%, speckled (sp1) links to a gene (sp2) of other speckled flower with about 25%, and a close linkage occurs between sp2 and r. Therefore, it should be expected that a linkage occurs between c4 and r. The linkage occurrence of one crossing gave the result to be agreeable to this expectation, there by the recombination frequency between these genes being 33.6%.Considering these linkage studies mentioned above, such a conclusion that these four genes arranged with the order c4-sp1-c-r on a chromosome may be introduced.Several other linkages described in the present paper, which maple (m) links to yellow 2 (y2) with 36.6%, to r with 48.0%, y2 links to r with 44.4%, and m links to c4 with 38.4%; together with other linkages which dusky (dy) links to yellow 1 (y1) with high intensity, to c4 with 37.4%, and c4 links to y1 with 37.6%, comfirm the former author's proposition that the speckled linkage group is put into the yellow one.A new gene "crumpled-4" (c4) of a crumpled leaf is considered to be a member of the yellow linkage group, and its locus is located between yellow 2 and speckled 1.
- 日本遺伝学会の論文
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関連論文
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- A new gene "Crumpled 4" to link with a gene for speckled flowers in Pharbitis Nil
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