genetic mapping

Heterozygosities and genetic relationship of tea cultivars revealed by simple sequence repeat markers and implications for breeding and genetic mapping programs

L. Q. Tan, Zhang, C. C., Qi, G. N., Wang, L. Y., Wei, K., Chen, S. X., Zou, Y., Wu, L. Y., and Cheng, H., Heterozygosities and genetic relationship of tea cultivars revealed by simple sequence repeat markers and implications for breeding and genetic mapping programs, vol. 14, pp. 1557-1565, 2015.

Genetic maps are essential tools for quantitative trait locus analysis and marker-assisted selection breeding. In order to select parents that are highly heterozygous for genetic mapping, the heterozygosity (HS) of 24 tea cultivars (Camellia sinensis) was analyzed with 72 simple sequence repeat markers. In total, 359 alleles were obtained with an average of 4.99 per marker. The HS varied greatly from 37.5 to 71.0% with an average of 51.3%.

Mapping of AFLP loci linked to tolerance to cowpea golden mosaic virus

M. A. Rodrigues, Santos, C. A. F., and Santana, J. R. F., Mapping of AFLP loci linked to tolerance to cowpea golden mosaic virus, vol. 11, pp. 3789-3797, 2012.

AFLP markers combined with the bulk segregant analysis methodology was used for the identification of molecular markers associated with the cowpea golden mosaic virus (CGMV) resistance gene in 286 F2 cowpea plants derived from the cross IT97K-499-35 x Canapu T16. Segregation data in the F2 population demonstrated that tolerance to CGMV is controlled by a single dominant gene.

Development and use of single nucleotide polymorphism markers for candidate resistance genes in wild peanuts (Arachis spp)

D. M. T. Alves, Pereira, R. W., Leal-Bertioli, S. C. M., Moretzsohn, M. C., Guimarães, P. M., and Bertioli, D. J., Development and use of single nucleotide polymorphism markers for candidate resistance genes in wild peanuts (Arachis spp), vol. 7, pp. 631-642, 2008.

The cultivated peanut (Arachis hypogaea L.) is an allotetraploid of recent origin, with an AABB genome and low genetic diversity. Perhaps because of its limited genetic diversity, this species lacks resistance to a number of important pests and diseases. In contrast, wild species of Arachis are genetically diverse and are rich sources of disease resistance genes. Consequently, a study of wild peanut relatives is attractive from two points of view: to help understand peanut genetics and to characterize wild alleles that could confer disease resistance.

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