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A Breeding Procedure for the Utilization of Heterosis in Tobacco‐Related Species Hybrids 1
Author(s) -
Wernsman E. A.,
Matzinger D. F.
Publication year - 1966
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/cropsci1966.0011183x000600030028x
Subject(s) - heterosis , nicotiana tabacum , selfing , hybrid , biology , interspecific hybrids , interspecific competition , interspecific hybridization , genome , botany , genetics , gene , population , demography , sociology
A technique is described in which the heterosis observed in interspecific hybrids of Nicoriana tabacum L. ✕ N. sylvestris Speg. and Comes and N. tabacum ✕ N. otophora Griesbach could be utilized in flue‐cured tobacco breeding programs. The method facilitates the partial substitution of the S genome of N. sylvestris and the T genome of N. otophora for the S and T genomes of N. tabacum independently. This is accomplished by selfing, or selfing and testcrossing to N. tabacum , pentaploid F 1 interspecific hybrids of 8x N. tabacum ✕ 2x N. sylvestris and 8x N. tabacum ✕ 2x N. otophora . High yielding species‐derived varieties or F 1 hybrids between two species derived lines are suggested as a means of utilizing the heterosis from these interspecific hybrids, depending on the type of gene action involved.