Sentence examples for difficulty of breeding from inspiring English sources
Moreover, lack of genetic diversity and the difficulty of breeding them in captivity make these animals very precious in zoological collections and they receive special care from the staff, including their diet which is evaluated for nutritional and sanitary risks.
Due to the difficulty of breeding and growing P.falciparum strains, only 34 progeny strains were used, a small number of strains that aggravates the detection of eQTL associations and increases the need for the more discerning methodology outlined here.
Conventional approaches to breeding crop plants with improved stress tolerance have thus far met with limited success because of the difficulty of breeding tolerance associated traits from diverse plant backgrounds.
Although these transgenic mouse strains mirror very closely gastric adenocarcinoma development in humans, experimentation with these mice is relatively time consuming and expensive due to the difficulties to determine tumor growth and the requirement of breeding transgenic mice.
Despite a reduction in malaria prevalence 68 the disease persists, possibly due to rapid urbanization, regular reintroduction, large numbers of breeding sites, a submicroscopic and/or asymptomatic parasite load, and the difficulty of targeting dormant stages of P. vivax.
None is capable of breeding.
In the models, we also incorporated the seasonal cycle of breeding and non-breeding.
We take into account the seasonal cycle of breeding and non-breeding.
However, as noted in Results, we encountered significant difficulty in breeding these animals and noted a high degree of lethality early in the process.
Besides the previous lack of suitable markers, another major reason why there are no genome maps for the Order Crocodylia is the difficulty in breeding informative predigrees from which DNA resources can be developed.
Despite these difficulties, breeding programs generate large volumes of phenotypic data, which poses a challenge for databases to efficiently store, query and analyze these data.
