Biased organelle transmission in somatic hybrids ofLycopersicon esculentum andSolanum lycopersicoides

Molecular and cytogenetic description of somatic hybrids between Gentiana cruciata L. and G. tibetica King

“…Besides nuclear DNA, the composition of cytoplasmic genomes is another uncertain factor in symmetric protoplast fusion, especially since somatic hybridization enables transmission, mixing, and recombination of organellar DNA (Guo et al 2004). The inheritance of chloroplasts and mitochondria has been studied repeatedly in different combinations of species and protoplast source cells (Levi et al 1988;Bonnema et al 1992;Li and Sink 1992;Buiteveld et al 1998a;Mohapatra et al 1998;Moreira et al 2000). In most somatic hybrids, rapid chloroplast segregation was observed, but the character of this process (random or biased), as well as the factors influencing it (including source tissue for protoplast isolation, genetic similarity of parental species, and differences in their ploidy level), has not been completely elucidated (Walters and Earle 1993).…”

Protoplast fusion in the genus Gentiana: genomic composition and genetic stability of somatic hybrids between Gentiana kurroo Royle and G. cruciata L.

“…elimination of chloroplasts inherited from one of the fusion partners in hybrid cells was observed in most somatic hybrids (Walters and Earle 1993). Again, this process can be either random (Scowcroft and Larkin 1981;Lössl et al 1994;Escalante et al 1998) or biased (Levi et al 1988;Bonnema et al 1992;Buiteveld et al 1998), whereas the co-existence of chloroplasts from both parental species is very rare (Mohapatra et al 1998;Moreira et al 2000). Several factors have been proposed to influence biased chloroplast transmission, along with their possible modus operandi (Rose et al 1990 and references therein).…”

Nuclear—Cytoplasm Interrelations in GenusLycopersicon

“…esculentum and L .peruvianum (47); L .esculentum and S. lycopersicoides (30); L. esculentum and S. nigrum (15); L. esculentum and S. tuberosum (64). A polymorphism in the mt DNA has been observed more frequently in PEG-induced somatic hybrids than in somatic hybrids produced after electrofusion (47) A predominant inheritance of L. pennellii mitochondrial genome has been reported for somatic hybrids between L. esculentum and L. pennellii (39,7).…”