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Inheritance Studies with Fertile Interspecific Hybrids of Three Carthamus L. Species 1
Author(s) -
Ashri A.,
Efron Y.
Publication year - 1964
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1964.0011183x000400050023x
Subject(s) - hebrew , hybrid , biology , inheritance (genetic algorithm) , citation , library science , interspecific hybrids , genealogy , horticulture , genetics , classics , history , computer science , gene
l~HE present investigation dealt with the cul t ivated -*species of safflower, Carthamus tinctorius L., and the wild species C, palaestinus Eig and C. oxyacantha M.B. The three species are closely related, giving fertile Fx hybrids in all combinations (1). All belong to the section of the genus having 2n = 24 chromosomes; this would be section I of Ashri and Knowles (1) and section Carthamus of Hanelt (5). One or the other of the 2 wild species has been proposed as a possible progenitor of the cultivated species (1, 5, 9). It was hoped that a genetic study of as many traits as possible would contribute to the elucidation of the ancestry of C. tinctorius and assist future breeding programs involving these two wild species. There is little knowledge on the genetics of the differences between these species. Deshpande reported (4) that yellow corolla was dominant to white and spininess was partially dominant to spinelessness. From data on interspecific F! hybrids it was concluded that yellow corolla was dominant to white, spininesss to spinelessness, obpyramidal seeds to oval, seed shattering to nonshattering and presence to pappus partially or completely dominant to its absence. The mode of inheritance of some of the characters has been investigated within the cul t iva ted species. Several authors (2, 7, 12) reported a monogenic control of yellow vs. white corolla with the latter being recessive. Monogenic control was found also for spininess vs. spinelessness, with the first being completely or partially dominant (2, 3, 8). Claassen reported (2) that spininess was modified also by an unknown number of polygenes. Pappus differences, according to Claassen (2), were due to one pair of alleles without dominance, with some polygenes involved as well. Knowles (Personal commun ica t i on , 1964) found that