<p>hello friends,</p>

<p>i have a list of GO terms, for example GO:0005975, how i can fine that which of these GO terms is related with cirus fruit senescence please???</p>

Try [DAVID][1] for the start, than you should read the manuals of some Bioconductor packages.

 - [topGO][2]
 - [GOexpress][3]
 - https://www.biostars.org/p/245/
 - https://www.biostars.org/p/8190/
 - https://www.biostars.org/p/85514/
 - [GO Analysis][4]
 - [GO analysis with R code][5]

Read properly and perform the commands for the dataset provided by the packages. Don't simply try to copy paste, to do analysis yourself. Understand the commands properly, what's going on and then try to implement the codes accordingly.

 [1]: http://david.abcc.ncifcrf.gov/
 [2]: http://www.bioconductor.org/packages/release/bioc/vignettes/topGO/inst/doc/topGO.pdf
 [3]: http://www.bioconductor.org/packages/release/bioc/vignettes/GOexpress/inst/doc/GOexpress-UsersGuide.pdf
 [4]: http://cals.arizona.edu/~anling/MCB516/lecture22.pdf
 [5]: http://davetang.org/muse/2010/11/10/gene-ontology-enrichment-analysis/