RESUMO
Plant cells carry their genetic information in three compartments: the nucleus, the plastids and the mitochondria. In last years, next-generation sequencing has allowed the development of genomic databases, which are increasingly improving our knowledge about the role of nuclear and cytoplasmic genes as well as their interactions in plant development. However, most plant breeding efforts consider the utilization of the nuclear genome, while less attention is given to plastid and mitochondrial genomes. The objective of this review is to present current knowledge about cytoplasmic and cytonuclear effects on agronomic traits bearing in mind the prospective utilization of all the genomes in plant breeding.
La información genética de las células vegetales está contenida en tres compartimentos: el núcleo, los plástidos y las mitocondrias. En los últimos años, la secuenciación de última generación ha permitido desarrollar bases de datos genómicas que están aumentando progresivamente nuestro conocimiento sobre el rol de los genes nucleares y citoplásmicos y de sus interacciones durante el desarrollo de la planta. Sin embargo, la mayoría de los esfuerzos de la mejora vegetal se basan en el aprovechamiento del genoma nuclear y relegan a los genomas de los plástidos y las mitocondrias. El objetivo de esta revisión es actualizar el conocimiento sobre de los efectos citoplásmicos y las interacciones núcleo-citoplásmicas sobre caracteres interés agronómico, asumiendo la utilización potencial de todos los genomas en el mejoramiento vegetal.
RESUMO
Objective To investigate the identification and optimal breeding method of caveolin-1 knockout mice, and provide an ideal animal model for further study of the role of caveolin-1 in cerebral ischemic injury and repair. Meth?ods The introduced caveolin-1 gene knockout mice were reared in the SPF laboratory and genomic DNA was extracted from mouse tail tissue by the method of boiling lysis. According to the primer sequences provided by the Jackson Laboratory of America for polymerase chain reaction ( PCR) to detect the genotypes, with the four different ways of mating:caveolin-1 +/ -heterozygote intercrossing, heterozygous and homozygous caveolin-1 -/ -hybrid ( orthogonal and pay) as well as homo-zygous intercrossing. The pregnancy rate, shape characteristics of the filial generation mice and homozygous rate of the pa-rental mice were observed. Results Agarose gel electrophoresis results indicated that the size of molecular weight of the PCR products was about 200 bp and 661 bp, which were consistent with the expected target gene fragment, and identified caveolin-1 gene knockout mice of different genotypes successfully. The results of different mating patterns are basically in a-greement with Mendel rule, and the female and male aveolin-1 -/ -homozygous mice had a certain ability to reproduce, three different genotypes of mice had no significant differences between the shape features. Conclusions PCR can fast and reliably identify the genotypes of caveolin-1 knockout mice using genomic DNA through the method of boiling lysis. Combi- ning the breeding methods of intercrossing of caveolin-1 heterozygous mice and intercrossing of caveolin-1 homozygous mice may be a good way to obtain enough homozygous mice and homologous wild type mice in a short period.