Heterosis

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.

Analysis of gene expression patterns and levels in maize hybrids and their parents

H. S. Nie, Li, S. P., Shan, X. H., Wu, Y., Su, S. Z., Liu, H. K., Han, J. Y., and Yuan, Y. P., Analysis of gene expression patterns and levels in maize hybrids and their parents, vol. 14, pp. 15399-15411, 2015.

Heterosis has greatly contributed to conventional plant breeding and is widely used to increase crop plant productivity. However, although some studies have explored the mechanisms of heterosis at the genomic and transcriptome level, these mechanisms still remain unclear. The growth and development of maize seedlings and immature embryos have an important impact on subsequent production.

Genome-wide prediction of maize single-cross performance, considering non-additive genetic effects

J. P. R. Santos, Pereira, H. D., Von Pinho, R. G., Pires, L. P. M., Camargos, R. B., and Balestre, M., Genome-wide prediction of maize single-cross performance, considering non-additive genetic effects, vol. 14, pp. 18471-18484, 2015.

The prediction of single-cross hybrids in maize is a promising technique for optimizing the use of financial resources in a breeding program. This study aimed to evaluate Genomic Best Linear Unbiased Predictors models for hybrid prediction and compare them with the Bayesian Ridge Regression, Bayes A, Bayesian LASSO, Bayes C, Bayes B, and Reproducing Kernel Hilbert Spaces Regression models, with inclusion or absence of non-additive effects under three heritability scenarios.

An expression profiling analysis of hybrid millet and its parents at grain filling stage

Z. H. Liu, Zhang, H. M., Li, G. L., Zhang, Y. M., Li, H. C., and Guo, X. L., An expression profiling analysis of hybrid millet and its parents at grain filling stage, vol. 14, pp. 7821-7832, 2015.

Heterosis has been widely used in crop breeding and production. However, a shortage of genes known to function in heterosis significantly limits our understanding of the molecular basis underlying heterosis. Here, we report 740 differentially expressed genes (DEGs) in the leaves of the hybrid millet Zhang No.5 and its parents at the grain filling stage determined using Solexa Illumina digital gene expression. Of the 740 DEGs, 546 were from the hybrid and its parents and most were up-regulated in the hybrid.

Molecular genetic analysis of heterosis in interspecific hybrids of Argopecten purpuratus x A. irradians irradians

L. P. Hu, Huang, X. T., Sun, Y., Mao, J. X., Wang, S., Wang, C. D., and Bao, Z. M., Molecular genetic analysis of heterosis in interspecific hybrids of Argopecten purpuratus x A. irradians irradians, vol. 14, pp. 10692-10704, 2015.

Argopecten purpuratus and Argopecten irradians irradi­ans hybridization was successfully performed and the hybrid offspring displayed apparent heterosis in growth traits. To better understand the genetic basis of heterosis, the genomic composition and genetic varia­tion of the hybrids were analyzed with amplified fragment length poly­morphism (AFLP) and simple sequence repeat (SSR) markers. Seven of eight universal SSR primers displayed polymorphism in the hybrids and their parental groups, and hybrids inherited both parental geno­types at each locus.

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