mass selection

mass selection

a method of producing new plant and animal varieties in which many suitable individuals contribute their genes to the new variety, all inferior types in the population having been removed (selected out) by the breeder.
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As I think this through, I'd likely plant many cultivars of sweet basil (and relatives), harvest seed from the best-tasting survivors, and continue for a few generations of mass selection with the hope of isolating a mildew-resistant yet tasty basil that's specifically adapted to my local conditions.
Out of these 22 sub-groups, first group was maintained with fully pedigree records, in second group birds were picked randomly without following any selection procedure, rest 20 groups were subjected to mass selection.
The main selection criteria adopted by breeders during mass selection are associated with traits that are components of production, such as the number of stalks and the stalk diameter and height (Oliveira et al.
The method, in advance of the reaction / collision cell and the quadrupole analyzer to realize that mass selection with upstream connection of a further quadrupole to select with a mass resolution of 1 only the desired ion is a necessity.
RBC WBC count MCV /fl MCH /pg Lymphocyte Heterophil % and H/L ratio were affected significantly either through pedigree selection or mass selection procedure.
I'm not in favour of knee-jerk reactions and mass selection changes, but something has to be done.
ABSTRACT The Sydney rock oyster, Saccostrea glomerata, mass selection breeding program was established in 1990 in the Georges River, New South Wales, and has successfully developed lines of oysters resistant to QX disease (Marteilia sydneyi) and winter mortality disease (WM; Bonamia roughleyi).
These birds were gradually improved using mass selection, but the industrialization of the poultry industry soon gave way to much more sophisticated methods: birds might be examined with ultrasound or x-rays to study the shape of muscles and bones, and blood oxygen levels were measured to determine cardiovascular health.
The stages of mass selection can be performed in space (e.
The authors begin with material suitable for students, including the molecular basis of inheritance in terms of genome organization, gene structure and regulation, transmission genetics, genetic markers, population genetics and quantitative genetics, genetic variation in natural populations, including variation within populations, geographic variation, evolutionary genetics and gene conservation, and tree improvement, including the structure and concepts of tree improvement programs, base populations, phenotypic mass selection, genetic testing, data analysis methods, deployment, and advanced-generation breeding stages.
Compton using 30 cycles of divergent mass selection for seed size from the open-pollinated variety, Krug Yellow Dent.
This configuration yields characteristic spectra for compounds that are traditionally indiscernible in conventional positive CI (PCI) or EI mode, through the production of reaction ions, and the mass selection of particular ions for the reaction.