We have reviewed the available data on VM, the amount of genetic variation in phenotypic traits produced each generation by mutation. We use these data to make several qualitative tests of the mutation-selection balance hypothesis for the maintenance of genetic variance (MSB). To compare VM values, we use three dimensionless quantities: mutational heritability, VM/VE, the mutational coefficient...

Evolutionary biology is in need of a yardstick or metric with which to measure morphological evolution in creatures as diverse as frogs and mammals. Two types of metric have been suggested to measure morphological distance, one based on quantal traits and the other on quantitative traits. Quantal traits are those whose state varies and is scored as 0 or 1 (presence or absence of a tongue). Quan...

The pomegranate fruit is one of the most important horticultural products due to the presence of polyphenolic, antioxidant and anti-fungal compounds. In the present study, morphological and phytochemical compounds diversity was investigated in eight Iranian commercial pomegranate cultivars. Fourteen morphological characters and 10 chemical compounds were measured. Based on PCA analysis the most...

to evaluate the effect of foliar application of nano iron chelate and iron chelate fertilizers on morphological traits and essential oil content of holy basil, an experiment was conducted at research farm of department of horticultural, shahid chamran university of ahvaz based on randomized complete blocks design with six treatments and three replications. the treatments were including control,...

this research was designed to identify garlic (allium sativum l.) bolting clones and determining the relationship between their morphological traits and bolting capacity by using statistical methods of analysis of variance, comparison of means, correlation coefficients, factor analysis, stepwise regression, path analysis and cluster analysis. traits including flowering ability, number, length a...