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Interspecific Hybridization in Glycine , Subgenus Leptocyamus 1
Author(s) -
Palmer R. G.,
Hadley H. H.
Publication year - 1968
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/cropsci1968.0011183x000800050016x
Subject(s) - biology , pollen , hybrid , backcrossing , subgenus , botany , reciprocal cross , ploidy , genome , genus , genetics , gene
Reciprocal hybrids between an induced autotetraploid form of Glycine tomentosa (Benth.) (n=20) and G. tabacina (Labill) Benth. (n=40) were obtained. All F 1 hybrids were morphologically intermediate between the parents and were highly male and female sterile as estimated by pollen stainability and seed set. However, F 1 hybrids with G. tomentosa cytoplasm had lower pollen stainability and the anthers usually failed to dehisce. F 1 's with G. tabacina cytoplasm shed pollen abundantly. F 2 and backcross plants generally were lower in fertility than the F 1 's. In all comparisons made between G. tomentosa and G. tabacina cytoplasms the former was associated with lower fertility. Both species are members of the subgenus Leptocyamus and limited attempts to cross them with G. max (of the sub‐genus, Soja ) were unsuccessful. Cytological observations indicated three different genomes are involved in the two species crossed. G. tomentosa was designated 2(A 1 ) and G. tabacina 2(A 0 A 2 ). Genome A 1 is apparently more closely related to both genome A 0 and A 2 than A 0 and A 2 are related to each other.