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Typus
Verschleierung
Bearbeiter
SleepyHollow02
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Untersuchte Arbeit:
Seite: 20, Zeilen: 1-10, 27 ff.
Quelle: Mohamed 2009
Seite(n): 21, 22, 23, Zeilen: 21: 8 ff.; 22: 16 ff.; 23: 2 ff.
Kantartzi and Stewart (2008) and analysed of genetic distancepopulation structure provided evidence of significant population structure in the Gossypium arboreum accessions and identified the highest likelihood at k=6 . A total of 30 marker-trait association were identified with 19 SSR markers located on 11 chromosomes, the association analysis identified marker-trait associations (P=0.05) for all traits evaluated. Lint%, lint colour, elongation, micronaire and perimeter were associated with four markers each, length with three markers, and strength and maturity with tow and five markers respectively, Furthermore the LD (R2 values) between markers ranged from 10% to 20%. Of the 30 marker-trait associations, four identified 15% or more of the total variation for lint% (BNL0256 and BNL1122), lint colour (BNL0542) and length (BNL1122).

[...]

Linkage disequilibrium (LD) is the non-random association of alleles in a sample population and forms the basis for the construction of genetic maps and the localization of genetic loci for a variety of traits. The principles leading to LD apply to both biparental mapping populations (F2, RILs, etc) and natural populations. Because of its inherent advantages, LD mapping approaches are increasingly being applied for plant species, in particular maize. Due to the out-breeding character of this species, LD extends only over a few kb and thus leads to [gh genetic resolution, up to the level of individual candidate genes that can be associated with a given trait (Rafalski and Morgante 2004, Gupta et al. 2005).]

Analysis of genetic distance and population structure provided evidence of significant population structure in the G. arboretum accessions and identified the highest likelihood at k=6 . A total of 30 marker-trait association were identified with 19 SSR markers located on 11 chromosomes, the association analysis identified marker-trait associations (P=0.05) for all traits evaluated. Lint%, lint colour, elongation, micronaire and perimeter were associated with four markers each, length with three markers, and strength and maturity with tow and five markers respectively, Furthermore the LD (R2 values) between markers ranged from 10% to 20%. Of the 30 marker-trait associations, four identified 15% or more of the total variation for lint% (BNL0256 and BNL1122), lint colour (BNL0542) and length (BNL1122) (Kantartzi and Stewart. 2008).

[page 22:]

Linkage disequilibrium is the non-random association of alleles in a sample population and forms the basis for the construction of genetic maps and the localization of genetic loci for a variety of traits. The principles leading to LD apply to both biparental mapping populations (F2, RILs, etc) and natural populations.

[page 23:]

Because of its inherent advantages, LD mapping approaches are increasingly being applied for plant species, in particular maize. Due to the out-breeding character of this species, LD extends only over a few kb and thus leads to a high genetic resolution, up to the level of individual candidate genes that can be associated with a given trait (Rafalski and Morgante 2004, Gupta et al. 2005).

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