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Inheritance of lobed leaf form in Lactuca



Inheritance of lobed leaf form in Lactuca



Hereditas 44(2/3): 347-377



The 3 leaf form types in lettuce, oakleaved, lobed and non-lobed are determined by the multiple alleles Uoak, Ulob and u. The segregation of leaf form characters is frequently disturbed. There is sometimes an excess of the oakleaved type over the proportion expected on the basis of monohybrid inheritance, sometimes a deficiency. There is very often deficiency of the lobed type, but in no case has an excess of this type been found. One line of L. serriola was found tohave a recessive anthocyanin reducing gene which is absolutely or extremely closely linked to the U-locus. With the aid of this linkage it has been proved that Durst's hypothesis of complementary genes for the lobed character is untenable. This conclusion is supported by the fact that it has not been possible to produce a lobed F1 by crossing non-lobed plants from F2 and F3 of segregating crosses. It is suggested that genetically controlled abnormalities at gametogenesis or at fertilization are the cause of the disturbed segregations.

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Accession: 014082249

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DOI: 10.1111/j.1601-5223.1958.tb03486.x


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