Nuclear DNA content in F1 hybrids of maize

Analysis of nuclear DNA content in monosomic maize plants

Five maize monosomics were analyzed for their nuclear DNA content. Several hundred seeds of R/r-X1 X mutants were grown for two weeks and monosomics with missing chromosomes were identified based on their mutant phenotypic characteristics. Nuclei were isolated from both normal and monosomic two-week old seedlings, and stained with 4,6-diamidino-2-phenylindole (DAPI) and propidium iodide (PI) fl...

Limitation of F1 hybrids uniformity law

the washback effect of discretepoint vs. integrative tests on the retention of content in knowledge tests

در این پایان نامه تاثیر دو نوع تست جزیی نگر و کلی نگر بر به یادسپاری محتوا ارزیابی شده که نتایج نشان دهندهکارایی تستهای کلی نگر بیشتر از سایر آزمونها است

Genetic Identification of F1 and Post-F1 Serrasalmid Juvenile Hybrids in Brazilian Aquaculture

Juvenile fish trade monitoring is an important task on Brazilian fish farms. However, the identification of juvenile fish through morphological analysis is not feasible, particularly between interspecific hybrids and pure species individuals, making the monitoring of these individuals difficult. Hybrids can be erroneously identified as pure species in breeding facilities, which might reduce pro...

Variability in the amount of homoeologous pairing among F1 hybrids

Genes involved in the exclusive pairing of homologous chromosomes have been described in several polyploid species but little is known about the activity of these genes in diploids (which have only one dose of each homoeologous genome). Analysis of the meiotic behaviour of species, natural and artificial hybrids and polyploids of Glandularia suggests that, in allopolyploids where homoeologous g...