centimorgan


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Mor·gan

(mōr'găn),
Harry de R., British physician, 1863-1931. See: Morgan bacillus.

mor·gan (M),

(mōr'găn),
The standard unit of genetic distance on the genetic map: the distance between two loci such that on average one crossing over will occur per meiosis; for working purposes, the centimorgan (0.01 M) is used.
[T.H. Morgan, U.S. geneticist, 1866-1945]

map unit

An arbitrary unit for the distance between genes, usually derived from the percentage of recombination, but also defined by the time at which the gene is transferred during conjugation. One map unit corresponds to a recombination frequency of 1%.

mor·gan

(mōr'găn)
The standard unit of genetic distance on the genetic map: the distance between two loci such that on average one crossing over will occur per meiosis; for working purposes, the centimorgan (0.01 M) is used.
[T.H. Morgan, U.S. geneticist, 1866-1945]

centimorgan

A unit of distance between two genes on a chromosome, representing a 1 per cent probability of recombination in a single meiotic event. Named after Thomas Hunt Morgan (1866–1945) the American Nobel-prizewinning geneticist often described as the father of modern genetics.
References in periodicals archive ?
Again, records are scarce, and without a historical trail to follow, Eve asked Trotsky's great-granddaughter to test her DNA so we can compare centimorgans. But these are tales for another day.
A statistically significant (P < 0.0001) association was also detected between SCN resistance and the genetic region that spans four AFLP and two SSR markers from centimorgan position 30.2 ([E.sub.AGC][M.sub.AAG]176) to at least centimorgan position 48.7 (Satt472) within population A81-1-2 (Fig.
Map units in centimorgans (cM) were derived from the Kosambi function (Kosambi, 1944), and the map was drawn by MapChart 2.1 (Voorrips, 2002).
Abbreviations: AIL, advanced intercross line; cM, centimorgan; G x E, genotype by environment; ID, inflorescence density; IM, interval mapping; MAS, marker-assisted selection; MQM, multiple-QTL mapping: QTL, quantitative trait locus; SY, seed yield; TSW, thousand-seed weight: YI, yield per inflorescence.
The Kosambi mapping function was used to compute the map distances in centimorgans (cM) from the recombination fractions.
A linkage map was constructed using JoinMap (Stam, 1993) by placing 33 out of 350 polymorphic RAPD markers on 10 partial LGs for a total length of 183 centimorgans (cM).
([section]) This position is based on the composite integrated genetic linkage map of the soybean; cM = Map distance in centimorgans. ([paragraph]) Log of odds ratio.
The Kosambi function was used to obtain centimorgan (cM) values.
The uniRec method was, however, effective at equalizing the number of recombinations per centimorgan observed across intervals of different lengths (Fig.
(c) Marshfield sex-averaged map location as measured in Kosambi centimorgans from the top of the short arm of the chromosome (Marshfield website).
This represents a substantial improvement over standard mapping strategies, which yield only statistically based confidence intervals on the order of 10 to 30 centiMorgans (cM), corresponding to about 20 to 50 Mb in mice (Glazier et al.
The combined genome scan data included 458 markers that were typed in 2 or more scans, which were included separately on the genetic map for the scan, separated by a very small distance [0.001 centimorgans (cM)].