Luxuriance or pseudoheterosis is characterized by:
Luxuriance sometimes described as pseudoheterosis refers to F1 hybrid displaying exaggerated vegetative vigor such as increased plant height, leaf area, tiller number and total biomass without corresponding increase in economic yield like grain, fruit or fiber. Physiologically occurs due to dominance effects on genes controlling gibberellin biosynthesis and cell expansion, enhancing vegetative growth but not improving harvest index or partitioning of photosynthates to reproductive organs. Seed fertility normal, seed weight may remain unchanged, harvest index declines. Such hybrids appear impre
Ref: Allard Principles Plant Breeding luxuriance; Sinha & Savchenko pseudoheterosis concept; Acquaah heterosis types explanation.