THE DISTRIBUTION OF SELF-INCOMPATIBILITY ALLELES IN POPULATIONS
نویسندگان
چکیده
منابع مشابه
The Study of Morphological Traits and Identification of Self-incompatibility Alleles in Almond Cultivars and Genotypes
The evaluation of an almond collection using morphological variables and identification of self-incompatibility genotype is useful for selecting pollinizers and for the design of crossing in almond breeding programs. In this study, important morphological traits and self-incompatibilities in 71 almond cultivars and genotypes were studied. Simple and multiplex specific PCR analyses were used in...
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H E phenomenon of self-sterility is known to be very common among T higher plants. The genetic mechanism in most cases studied seems to be that discovered by EAST and MANGELSDORF in Nicotiana data and N . Sanderae. A single series of alleles, S1, Sz . . . , is involved. The growth of a pollen tube is so much inhibited in a style whose cells contain the same allele that it does not reach the emb...
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For a system of n self-incompatibility alleles, neglecting mutation and random drift, it is shown that the completely symmetric equilibrium is locally stable, and any allelic frequency less than q equals 1 + a minus the square root of 1 + a-2, where a equals [2(n minus 1)]- minus 1, will increase. For all n, q greater than (2n)- minus 1, but if n greater than 1, q is approximately equal to (2n)...
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The almond, Prunus dulcis Miller which belongs to Rosaceae family, is one of the most important commercial and oldest cultivated tree nut crops. Almonds are classified as a ‘nut’ in which the edible seed is the commercial product. Therefore, pollination and fertilization are necessary in almond. The characteristic of cultivated almond to express gametophytic self- incompatibility discourages se...
متن کاملGenealogical structure among alleles regulating self-incompatibility in natural populations of flowering plants.
A method is proposed for characterizing the structure of genealogies among alleles that regulate self-incompatibility in flowering plants. Expected distributions of ratios of divergence times among alleles, scaled by functions of allele number, were generated by numerical simulation. These distributions appeared relatively insensitive to the particular parameter values assigned in the simulatio...
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ژورنال
عنوان ژورنال: Evolution
سال: 1964
ISSN: 0014-3820
DOI: 10.1111/j.1558-5646.1964.tb01675.x