Natural hybridization between two butterfly bushes in Tibet: dominance of F1 hybrids promotes strong reproductive isolation
نویسندگان
چکیده
Abstract Background It has been recognized that a certain amount of habitat disturbance is facilitating factor for the occurrence natural hybridization, yet to date we are unaware any studies exploring hybridization and reproductive barriers in those plants preferentially occupying disturbed habitats. Buddleja (also called butterfly bush) generally do grow habitats, several species with hybrid origin have proposed, based solely on morphological evidence. Results In present study, test hypothesis B. × wardii two sympatric populations three taxa including its parents ( alternifolia crispa ) plus 4 referenced parental populations, using four nuclear genes chloroplast intergenic spacers, as well 10 characters. Our results suggest at both sites likely be between , moreover, confirm most hybrids examined F 1 s. That these s further supported by morphology, no transgressive characters were detected. was found maternal parent Bahe (BH) population, from cpDNA However, Taji (TJ) direction difficult establish due shared haplotypes however still predicted similar unidirectional pattern cross-specific pollination treatments which “SI SC rule”. Conclusions The presence mainly can successfully impede gene flow thus maintain boundaries typical distribution i.e.
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ژورنال
عنوان ژورنال: BMC Plant Biology
سال: 2021
ISSN: ['1471-2229']
DOI: https://doi.org/10.1186/s12870-021-02909-7