Investigation of genes involved in nucellar embryony mechanisms by molecular tecniques in citrus

True power and/or features of genotypes are not passed to individuals as a result of hybridization due to nucellar embryony by Citrus breeders. This situation for researchers working in citrus breeding studies can lead to loss of time and money being quite large. On the other hand, nucellar embryony mechanism provide a great advantage to clonal propagation from direclty seeds for nurserymen. The aim of the present thesis study is to determine differentially expressed genes involved in nucellar embryony mechanism. In this study used 'Orlando tangelo' producing 99% apomictic seeds and 'Clementine mandarin' known as monoembryonic as plant materials. First detected the period which the nucellar embryo initial cells began to develop in 'Orlando tangelo' by histological analysis. Nucellar embryo initial cells were first observed in third day after anthesis. RNA-Seq analysis were performed using by Illumina HiSeqTM 2000, called as raw reads, was subjected to quality control (QC). After QC, raw reads were filtered into clean reads aligned to the reference sequences. Citrus clementine full genome was used as reference genome. Then differentially expressed genes (DEGs) among samples was determined and based on these genes were carried out gene ontology (GO) analysis. It was identified 2359 differentially expressed genes (DEGs) (1996 up regulated, 363 down-regulated), 2123 (1372 up regulated, 751 down regulated), genes from the samples at Orlando tangelo balloon stage- Orlando tangelo third day and Clementine mandarin third day and Orlando tangelo third day, respectively. This dataset provides valuable information regarding citrus transcriptome changes for nucellar embryony mechanism and may help guide future identification and functional analysis of genes that are important for polyembrony.