Part of a piece of news from El Pais.

Orange is the daughter of a tangerine and the mother of the grapefruit

If you have an orange or another citric fruit nearby, just look at it. Behind that piece of fruit there is an epic story that reminds us of recalls those the Alexander Magnus battles, the Islamic expansion (or the expansion of Islam), the Christian Crusaders' military campaigns, Jews´ the Jewish diaspora or the discovery of America discover. That piece of fruit you are looking at is a humanity story book of humanity and it has reached your hand thanks to a huge number of conquers conquests and reconquests and a scientific battle through the last centuries.
"The ancestor of all the citric trees lived eight million of years ago in Southern Southeast (segun el artículo) Asia, explained the biologist Manuel Talon, who have has just drawn the most powerful genealogical tree about this these kinds of fruit trees. The matrimonies marriages, simplified, can be drawn as if they were Buendia family members in 'One hundred years of solitude'. "Sweet orange is the daughter of a pummelus (mother of the grapefruit) and a tangerine", told indicated Talon, director of the Genomica Center of the Agrarian Investigations´ Valencia Institute, which locates that relation places that link in the modern what is now Western China 30.000 years ago.
In that cross mix of species, the tangerine was the father. It was a wild tangerine, sour and plenty full of seeds, uneatable inedible, which would send its 'sperm', the masculine male pollen, through the wind to the mother´s flowers, a pummelo (same as in Castellano). As the a result of that union, it would have been born the first orange would have been born, which, as Talon speculates, would have been noticed by a Chinese farmer, who would have carried on that farming by grafting trees. Milleniums later, at the end of the XV century, the sweet orange arrived in Spain with the help of the Portuguese and Italian traders.
The biologic team has studied the genome of 30 citric species. Specifically, scientists have read the cloroplastos DNA of cloroplastos, a kind of vegetal cells organs which carries genetical information inherited from the mother. The research results will be published now in the Molecular Biology and Evolution Magazine.


The original text is here:
http://elpais.com/elpais/2015/04/14/ciencia/1429035387_315915.html

Very good. There is a lot of complex vocabulary and grammar in that text! My corrections are in red and my suggestions to sound more natural are in blue/grey.

In your opening sentence, it sounds more natural to start each historical event with the article ("the").

Marriage and matrimony both have similar meanings, however "matrimony" is normally used to describe the actual ceremony. "Marriage" is used to describe the ongoing process. For example a marriage can last for many years but a matrimony is normally only one day. (However you can be "in a state of matrimony" for years also).