Perhaps the best available indicator of a historical role of genetic drift in shaping genetic variation underlying fitness is heterosis (Crow, 1948; Lynch, 1991; Whitlock et al., 2000), the ...

Heterosis, also known as hybrid vigor, is the superior performance of a heterozygous hybrid relative to its homozygous parents. Despite the scientific curiosity of this phenotypic phenomenon and ...

Scientists think they may have discovered a new source of heterosis, or hybrid vigor, in maize. They have been looking at small RNAs, a class of double-stranded RNA molecules that are 20 to 25 ...

The increased performance of hybrids is generally known as hybrid vigour, or heterosis, and has been observed in many different plant (and animal) species. However, the heterosis effect no longer ...

But here, instead of loss, the researchers assure us of a gain: that the deletion could lead to an abundant harvest of these plants, thanks to a process called heterosis. The DNA molecule consists ...