Month: September 2022

GREATER HYBRID FITNESS. "Often, transgressive hybrids have higher fitness in novel environments, increasing the likelihood of divergence from parental populations." http://link.springer.com/article/10.1007/s11692-012-9209-0 View in LinkedIn

EXAMPLES OF HYBRID FITNESS. "A few examples of new phenotypes inferred to arise from hybridization include: extreme size of tiger x lion F1 hybrids; unique shapes and colors of hybrid orchids; ability of recombinant sunflowers to thrive in extreme habits; specialization on a novel host plant in lonicera flies; and expression of novel gene transcripts (including new exons) via alternative splicing in hybrid poplars." https://lnkd.in/dDz5VYD View in LinkedIn

MONSTER SALTATIONS. "This small selection of cases serves to illustrate sudden appearance of profound differences between parents and hybrid offspring reminiscent of Goldschmidt’s hopeful monsters." https://lnkd.in/dDz5VYD View in LinkedIn

RISE OF THE HOPEFUL MONSTERS. "But through fish in the murky depths of a British Columbia lake and through bacteria in the flasks of a Michigan lab, the monsters have returned. Experimental evidence has shown that individual genetic changes can have vast effects on an organism without dooming it to the evolutionary rubbish heap." https://lnkd.in/dAC2mFa View in LinkedIn

MENDELIAN SPECTRUM. "Recombination has always been recognized as an important source of variation; whether such variation is perceived as profound or “monstrous” is a matter of degree rather than kind." http://link.springer.com/article/10.1007/s11692-012-9209-0 View in LinkedIn

RECOMBINATIONAL DOMINANCE. "Admixed populations will also produce many similar recombinant phenotypes at the same time, increasing the probability that recombinant “hopeful monsters” will establish true-breeding evolutionary lineages. Recombination is not the only (or even most common) process generating evolutionary novelty, but might be the most credible mechanism for sudden appearance of new forms." http://link.springer.com/article/10.1007/s11692-012-9209-0 View in LinkedIn

HYBRID PHENOTYPE COMPLEXITY. "Natural hybridization frequently promotes gene introgression among closely related species in sympatric populations, producing complex patterns of morphological variation." https://lnkd.in/dkD3erC View in LinkedIn

LEAKY SPECIES BARRIER. "Interspecific hybridization can generate a large range of characters in hybrids, including intermediate characters and potentially characters that fall outside the range found in the parents (transgressive characters). Hybrids usually backcross to one or both of the parents, providing gene flow between species." https://lnkd.in/dHD-ddW View in LinkedIn

TRANSGRESSIVE PHENOTYPES. "Interspecific hybridization and allopolyploidy provide the opportunity for new, transgressive characters to evolve. Transgressive characters can be observed at all levels from the transcriptome to inflorescence morphology and may arise through novel cis-trans interactions in the genome or by 'mixing and matching' of different metabolic pathways found in the parents." https://genomebiology.biomedcentral.com/articles/10.1186/gb-2013-14-6-207 View in LinkedIn

SUDDEN EVOLUTIONARY JUMPS. "Transgressive segregation might be an important mechanism promoting sudden phenotypic changes and ecological transitions in evolution. Even if most of the variation produced is deleterious, a rare transgressive hybrid genotype could rapidly fix in a population or establish a novel lineage." http://link.springer.com/article/10.1007/s11692-012-9209-0 View in LinkedIn