interspecific hybrid

New hybrids from peanut (Arachis hypogaea L.) and synthetic amphidiploid crosses show promise in increasing pest and disease tolerance

A. P. Fávero, Pádua, J. G., Costa, T. S., Gimenes, M. A., Godoy, I. J., Moretzsohn, M. C., and Michelotto, M. D., “New hybrids from peanut (Arachis hypogaea L.) and synthetic amphidiploid crosses show promise in increasing pest and disease tolerance”, vol. 14, pp. 16694-16703, 2015.

The primary gene pool of the cultivated peanut (Arachis hypogaea L., allotetraploid AABB) is very narrow for some important characteristics, such as resistance to pests and diseases. However, the Arachis wild diploid species, particularly those from the section Arachis, still have these characteristics. To improve peanut crops, genes from the wild species can be introgressed by backcrossing the hybrids with A. hypogaea. When diploid species whose genomes are similar to those of the cultivated peanut are crossed, sterile hybrids result.

Phenotyping of Passiflora edulis, P. setacea, and their hybrids by a multivariate approach

E. A. Santos, Viana, A. P., Freitas, J. C. O., Souza, M. M., Paiva, C. L., Rodrigues, D. L., and Tavares, R. F., “Phenotyping of Passiflora edulis, P. setacea, and their hybrids by a multivariate approach”, vol. 13, pp. 9828-9845, 2014.

Morphological characterization is the most accessible and used method to quantify the genetic diversity of the available germplasm. The multivariate statistical method is highly important for this purpose. This study aimed to characterize parents and hybrids of Passiflora according to morphoagronomic descriptors and estimate the genetic divergence between them based on the joint analysis of qualitative and quantitative variables using the Ward-modified location model (MLM) procedure. One hundred and thirty-eight individuals were assessed (10 P. edulis, 10 P.

Assessing genetic divergence in interspecific hybrids of Aechmea gomosepala and A. recurvata var. recurvata using inflorescence characteristics and sequence-related amplified polymorphism markers

F. Zhang, Ge, Y. Y., Wang, W. Y., Shen, X. L., and Yu, X. Y., “Assessing genetic divergence in interspecific hybrids of Aechmea gomosepala and A. recurvata var. recurvata using inflorescence characteristics and sequence-related amplified polymorphism markers”, vol. 11, pp. 4169-4178, 2012.

Conventional hybridization and selection techniques have aided the development of new ornamental crop cultivars. However, little information is available on the genetic divergence of bromeliad hybrids. In the present study, we investigated the genetic variability in interspecific hybrids of Aechmea gomosepala and A. recurvata var. recurvata using inflorescence characteristics and sequence-related amplified polymorphism (SRAP) markers.

Evaluation of microsporogenesis in an interspecific Brachiaria hybrid (Poaceae) collected in distinct years

V. A. Fuzinatto, Pagliarini, M. S., and Valle, C. B., “Evaluation of microsporogenesis in an interspecific Brachiaria hybrid (Poaceae) collected in distinct years”, vol. 7, pp. 424-432, 2008.

Microsporogenesis in an interspecific Brachiaria hybrid, grown in the field under natural environmental conditions in Brazilian savannas, was analyzed in three distinct years of collection. Several types of meiotic abnormalities were recorded during those three years, but varied in type and frequency depending on the year. The average temperature and rainfall 15 days before collection was unusually high in those years. The percentage of abnormal meiocytes recorded was 62% in 2001, 73% in 2004, and 77% in 2005.

Cytogenetic and molecular analysis of an apomictic cassava hybrid and its progeny

N. M. A. Nassar, Gomes, P. T. C., Chaib, A. M., Bomfim, N. N., Batista, R. C. D., and Collevatti, R. G., “Cytogenetic and molecular analysis of an apomictic cassava hybrid and its progeny”, vol. 8, pp. 1323-1330, 2009.

An interspecific hybrid between cassava and Manihot glaziovii acquired an apomixis gene from the parent M. glaziovii. This hybrid was exposed to open pollination during three subsequent generations. Seven sibs and the maternal progenitor of the fourth generation were genotyped using six microsatellite loci previously developed for cassava. All sibs were identical with each other and with their maternal progenitor. Sibs of selfed M. glaziovii proved to be identical when examined with these microsatellite loci.

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