Amplified fragment length polymorphism (AFLP) in soybean: species diversity,inheritance, and near-isogenic line analysis

Maughan, Peter J.; Maroof, M. A. Saghai; Buss, G. R.; Huestis, Gordon M.

doi:10.1007/s001220050293

Cited by 90 publications

(110 citation statements)

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“…Khlestkina et al, 2004;Ford-Lloyd, 2006). Genetic erosion as a reduction in evenness originates from the diversity indices used in vegetation ecology and population genetics, such as Shannon's index (Maughan et al, 1996) or Nei's gene diversity index (Nei, 1973), respectively. Diversity is measured using the frequencies of alleles within a group of genotypes or using the production areas of landraces, cultivars or crop species in a region.…”

Section: Genetic Erosion Of Crops: a Definitionmentioning

confidence: 99%

Genetic erosion in crops: concept, research results and challenges

et al. 2009

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The loss of variation in crops due to the modernization of agriculture has been described as genetic erosion. The current paper discusses the different views that exist on the concept of genetic erosion in crops. Genetic erosion of cultivated diversity is reflected in a modernization bottleneck in the diversity levels that occurred during the history of the crop. Two stages in this bottleneck are recognized: the initial replacement of landraces by modern cultivars; and further trends in diversity as a consequence of modern breeding practices. Genetic erosion may occur at three levels of integration: crop, variety and allele. The different approaches in the recent literature to measure genetic erosion in crops are reviewed. Genetic erosion as reflected in a reduction of allelic evenness and richness appears to be the most useful definition, but has to be viewed in conjunction with events at variety level. According to the reviewed literature, the most likely scenario of diversity trends during modernization is the following: a reduction in diversity due to the replacement of landraces by modern cultivars, but no further reduction after this replacement has been completed.

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Section: Genetic Erosion Of Crops: a Definitionmentioning

confidence: 99%

Genetic erosion in crops: concept, research results and challenges

et al. 2009

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“…The preamplifications were carried out with one selective nucleotide and in the specific amplification, two or three nucleotides were added to the primer. Adaptors were as described by Maughan et al (1996). Primer combinations tested and development of the species-specific AFLP markers are described in detail in Hansen et al (2001).…”

Section: Chromosome Countingmentioning

confidence: 99%

Progressive introgression between Brassica napus (oilseed rape) and B. rapa

Hansen¹,

Siegismund

Jørgensen³

2003

Heredity

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We have earlier shown extensive introgression between oilseed rape (Brassica napus) and B. rapa in a weedy population using AFLP markers specific for the nuclear genomes. In order to describe the progress of this introgression, we examined 117 offspring from 12 maternal plants from the introgressed population with the same AFLPmarkers; AFLP data were supported by chromosome counting. We also analysed the offspring with a speciesspecific chloroplast marker and finally evaluated the reproductive system in selected maternal plants. Our results indicated a high outcrossing rate of the introgressed maternal plants. It seemed that B. rapa most often functioned as the maternal plant in the introgression process and that the amount of oilseed rape DNA was highly diminished in the offspring compared to their introgressed maternal plants. However, our analysis of plants from the weedy population indicated that introgression can lead to both (1) exchange of chloroplast DNA between species producing B. rapa-like plants with B. napus chloroplasts and (2) incorporation of B. napus C-genome DNA into the B. rapa genome. Therefore, we question whether it can be regarded as containment to position transgenes in the chloroplast or in specific parts of the nuclear genome of B. napus. Heredity (2003) 91, 276-283.

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“…Prediction of genetic variability through AFLP-based measure of genetic distance in soybean been reported for hop varieties (Hartl and Seefelder 1998) and wheat lines (Barret and Kidwel 1998), respectively. In soybean, Maughan et al (1996) and Ude et al (2003) reported as much as 18 and 34 polymorphisms per primer pair, respectively. This difference can be explained by the fact that we looked only at a small set (four) of cultivated germplasm, unlike the studies of Maughan et al (1996) which compared accessions of both Glycine max and Glycine soja, and Ude et al (2003) who determined the level of genetic distance within and between Asian and north American cultivars.…”

Section: Aflp Analysismentioning

confidence: 99%

“…In soybean, Maughan et al (1996) and Ude et al (2003) reported as much as 18 and 34 polymorphisms per primer pair, respectively. This difference can be explained by the fact that we looked only at a small set (four) of cultivated germplasm, unlike the studies of Maughan et al (1996) which compared accessions of both Glycine max and Glycine soja, and Ude et al (2003) who determined the level of genetic distance within and between Asian and north American cultivars. Considering the small set of genotypes involved in the analysis, these primer combinations are a good choice for future studies on soybean genetic diversity or mapping studies.…”

Section: Aflp Analysismentioning

confidence: 99%

Prediction of genetic variability through AFLP-based measure of genetic distance in soybean

Bonato¹,

Calvo²,

Arias³

et al. 2006

CBAB

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-Molecular markers have been used to predict the genetic variance of segregating soybean populations by measuring the genetic distance between parents. For this purpose we analyzed the genetic distance among six pairwise combinations of four soybean lines grown in Southern Brazil. The AFLP-based distances (AFD) were estimated with 21 primer-pair combinations. Additive genetic variance (D) was estimated in 100 advanced inbred lines for each cross for seven traits, including grain yield, for four sowing dates, and four years. Results showed a low but significant overall correlation (r=0.21*) between grain yield variance and AFD in the average of the four years and sowing dates. Considering the sowing dates the highest correlation was in October (r=0.41*). Significant correlations were also found for five out of the remaining traits evaluated. We found no significant correlations between D and parentage coefficient for all traits evaluated, except for 100 seed weight (r=0.32*).

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Amplified fragment length polymorphism (AFLP) in soybean: species diversity,inheritance, and near-isogenic line analysis

Cited by 90 publications

References 0 publications

Genetic erosion in crops: concept, research results and challenges

Genetic erosion in crops: concept, research results and challenges

Progressive introgression between Brassica napus (oilseed rape) and B. rapa

Prediction of genetic variability through AFLP-based measure of genetic distance in soybean

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