Breeding morphological characteristics

Both from theoretical and practical points of view, connection between chemical traits (essential oil composition) and morphological characteristics would be of interest. External features as marker traits for oil composition would be of high importance during cultivation, breeding, or control. However, besides some exemptions, there are no reliable data about this topic. 

Honeybee wings are one of the most frequently measured insect body parts. These measurements are most often used to distinguish between honeybee subspecies (Ruttner, 1988a). This discrimination is required in honeybee breeding in order to preserve the morphological characteristics of... 

An inherited muscular dystrophy in the chicken, discovered by As-mundson and Julian in 1956 (A4), is also transmitted as an autosomal recessive characteristic. Affected birds are unable to raise their wings or to rise when placed on their backs on a flat surface. Egg production is, however, normal, making it a relatively easy matter to breed a dystrophic line. The chicken, therefore, has been particularly useful in studying the development of myopathy and the relationships of pathological and developmental changes in muscle. It is of interest that, in contrast with the mouse disease, a number of morphological and biochemical abnormalities can be seen in the heterozygotes in this species. 

As regards the different traits, besides morphological, technological, and yield characteristics as well as quantity and composition of the essential oil, also stress resistance and resistance to pests and diseases are highly relevant targets in breeding of essential oil plants. Well known in this respect... 

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