Genetic diversity

Genetic diversity analysis of Aspergillus flavus isolates from plants and air by ISSR markers

M. A. Mahmoud, El-Samawaty, A. M. A., Yassin, M. A., El-Aziz, A. R. M. Abd, Mahmoud, M. A., El-Samawaty, A. M. A., Yassin, M. A., and El-Aziz, A. R. M. Abd, “Genetic diversity analysis of Aspergillus flavus isolates from plants and air by ISSR markers”, vol. 15, p. -, 2016.

Aspergillus flavus is one of the most abundant and widely distributed fungi on earth. A. flavus produces aflatoxins (AFs), which are toxic secondary metabolites. AFs have harmful effects on public health (humans and animals) and agricultural crops. Inter-simple sequence repeat (ISSR) markers were used to analyze the genetic diversity of 30 A. flavus isolates from five agricultural crops and air. Genetic similarity coefficients (GSC) ranged from 0.51 to 0.10 based on three ISSR markers for the isolates tested. A.

Genetic diversity and population structure of Castanopsis eyrei based on simple sequence repeat markers

L. H. Mao, Zhou, X. L., Fang, Y. M., Mao, L. H., Zhou, X. L., and Fang, Y. M., “Genetic diversity and population structure of Castanopsis eyrei based on simple sequence repeat markers”, vol. 15, p. -, 2016.

Castanopsis eyrei (Fagaceae) is one of the dominant tree species in mid-subtropical, evergreen, broad-leaved forests. We obtained 14 pairs of simple sequence repeat (SSR) primers from previous studies, which were used to analyze 90 C. eyrei individuals from three populations at different altitudes. Low heterozygosity was detected (Fis = 0.6124), and the observed heterozygosity was lower than the expected heterozygosity, possibly because of inbreeding and/or the population substructure.

Characterization and genetic diversity of pepper (Capsicum spp) parents and interspecific hybrids

M. P. S. D. Costa, Rêgo, M. Mdo, da Silva, A. P. G., Rêgo, E. Rdo, Barroso, P. A., Costa, M. P. S. D., Rêgo, M. Mdo, da Silva, A. P. G., Rêgo, E. Rdo, and Barroso, P. A., “Characterization and genetic diversity of pepper (Capsicum spp) parents and interspecific hybrids”, vol. 15, p. -, 2016.

Pepper species exhibit broad genetic diversity, which enables their use in breeding programs. The objective of this study was to characterize the diversity between the parents of different species and their interspecific hybrids using morphological and molecular markers. The parents of Capsicum annuum (UFPB-01 and -137), C. baccatum (UFPB-72), and C. chinense (UFPB-128) and their interspecific hybrids (01x128, 72x128, and 137x128) were used for morphological and molecular characterization.

Prediction of industrial tomato hybrids from agronomic traits and ISSR molecular markers

A. S. T. Figueiredo, Resende, J. T. V., Faria, M. V., Da-Silva, P. R., Fagundes, B. S., Morales, R. G. F., Figueiredo, A. S. T., Resende, J. T. V., Faria, M. V., Da-Silva, P. R., Fagundes, B. S., and Morales, R. G. F., “Prediction of industrial tomato hybrids from agronomic traits and ISSR molecular markers”, vol. 15, p. -, 2016.

Heterosis is a highly relevant phenomenon in plant breeding. This condition is usually established in hybrids derived from crosses of highly divergent parents. The success of a breeder in obtaining heterosis is directly related to the correct identification of genetically contrasting parents. Currently, the diallel cross is the most commonly used methodology to detect contrasting parents; however, it is a time- and cost-consuming procedure. Therefore, new tools capable of performing this task quickly and accurately are required.

Genetic diversity in fragmented populations of Populus talassica inferred from microsatellites: implications for conservation

X. H. Zhu, Cheng, S. P., Liao, T., Kang, X. Y., Zhu, X. H., Cheng, S. P., Liao, T., and Kang, X. Y., “Genetic diversity in fragmented populations of Populus talassica inferred from microsatellites: implications for conservation”, vol. 15, p. -, 2016.

Populus talassica Kom. is an ecologically important species endemic to central Asia. In China, its main distribution is restricted to the Ili region in the Xinjiang Autonomous Region. An understanding of genetic diversity and population structure is crucial for the development of a feasible conservation strategy. Twenty-six high-level simple sequence repeat (SSR) markers were screened and used to genotype 220 individuals from three native populations. A high level of genetic diversity and low population differentiation were revealed.

Genetic diversity of rhg1 and Rhg4 loci in wild soybeans resistant to soybean cyst nematode race 3

C. P. Yuan, Wang, Y. J., Zhao, H. K., Zhang, L., Wang, Y. M., Liu, X. D., Zhong, X. F., Dong, Y. S., Yuan, C. P., Wang, Y. J., Zhao, H. K., Zhang, L., Wang, Y. M., Liu, X. D., Zhong, X. F., and Dong, Y. S., “Genetic diversity of rhg1 and Rhg4 loci in wild soybeans resistant to soybean cyst nematode race 3”, vol. 15, p. -, 2016.

Over-utilization of germplasms that are resistant to the soybean cyst nematode (SCN) in soybean breeding programs can lead to genetic vulnerability in resistant cultivars. Resistant wild soybean (Glycine soja) is considered an invaluable gene source for increasing the genetic diversity of SCN resistance. In this study, we genotyped 23 G.

Analysis of genetic diversity of Laeliinae (Orchidaceae) in the State of Sergipe using ISSR markers

M. F. Arrigoni-Blank, Santos, M. S., Blank, A. F., Rabbani, A. R. C., Silva-Mann, R., Santos, J. B., Costa, A. S., Menezes, T. S. A., Arrigoni-Blank, M. F., Santos, M. S., Blank, A. F., Rabbani, A. R. C., Silva-Mann, R., Santos, J. B., Costa, A. S., and Menezes, T. S. A., “Analysis of genetic diversity of Laeliinae (Orchidaceae) in the State of Sergipe using ISSR markers”, vol. 15, p. -, 2016.

The Orchidaceae represent one of the largest and most diverse families on the planet. However, this family is constantly threatened by predators and by the advancement of urban centers over its natural habitats. The objective of this study was to use inter-simple sequence repeat markers to evaluate the genetic diversity between orchid accessions of the Laeliinae subtribe, which comprise part of the Orchidaceae study collection at the Department of Agronomic Engineering of the Federal University of Sergipe.

Development and characterization of microsatellite markers of the eastern keelback mullet (Liza affinis)

L. Liu, Gao, T. X., Han, Z. Q., Li, C. H., Sun, D. R., Song, N., Liu, L., Gao, T. X., Han, Z. Q., Li, C. H., Sun, D. R., and Song, N., “Development and characterization of microsatellite markers of the eastern keelback mullet (Liza affinis)”, vol. 15, p. -, 2016.

Twenty-four polymorphic microsatellite loci were isolated and characterized for Liza affinis using a (GT)13-enriched genomic library. The number of alleles per locus ranged from 3 to 9, with a mean number of 6.250. The observed and expected heterozygosities ranged from 0.417 to 1.000 and from 0.550 to 0.861, with an average of 0.859 and 0.779, respectively. Deviation from Hardy-Weinberg proportions was detected at three loci. Evidence of null alleles was found at two loci.

Structure and genetic diversity of natural Brazilian pepper populations (Schinus terebinthifolius Raddi)

S. V. Álvares-Carvalho, Duarte, J. F., Santos, T. C., Santos, R. M., Silva-Mann, R., Carvalho, D., Álvares-Carvalho, S. V., Duarte, J. F., Santos, T. C., Santos, R. M., Silva-Mann, R., and Carvalho, D., “Structure and genetic diversity of natural Brazilian pepper populations (Schinus terebinthifolius Raddi)”, vol. 15, p. -, 2016.

In the face of a possible loss of genetic diversity in plants due the environmental changes, actions to ensure the genetic variability are an urgent necessity. The extraction of Brazilian pepper fruits is a cause of concern because it results in the lack of seeds in soil, hindering its distribution in space and time. It is important to address this concern and explore the species, used by riparian communities and agro-factories without considering the need for keeping the seeds for natural seed banks and for species sustainability.

Genetic diversity and structure of the threatened species Sinopodophyllum hexandrum (Royle) Ying

W. Liu, Wang, J., Yin, D. X., Yang, M., Wang, P., Han, Q. S., Ma, Q. Q., Liu, J. J., Wang, J. X., Liu, W., Wang, J., Yin, D. X., Yang, M., Wang, P., Han, Q. S., Ma, Q. Q., Liu, J. J., and Wang, J. X., “Genetic diversity and structure of the threatened species Sinopodophyllum hexandrum (Royle) Ying”, vol. 15, p. -, 2016.

Sinopodophyllum hexandrum is an important medicinal plant that has been listed as an endangered species, making the conservation of its genetic diversity a priority. Therefore, the genetic diversity and population structure of S. hexandrum was investigated through inter-simple sequence repeat analysis of eight natural populations. Eleven selected primers generated 141 discernible fragments. The percentage of polymorphic bands was 37.59% at the species level, and 7.66-24.32% at the population level. Genetic diversity of S.

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