Why the krogan were brought to andromeda?

How did Nakmor clan get contracted to work on the AI? Where did Nakmor get all those krogan engineers? Why Garson is sympathetic to krogans? How did she made the salarians and turians "anti-krogan" members agree to it? And how did Morda manage the AI to not only bring her clan, but to help CURE THE GENOPHAGE too? You know that disease that if cured would allow krogan to outnumber 100:1 all other races in a few years.

Please tell me where all that is explained on official lore. Last time Nakmor was mentioned in ME2, they were a small weak clan and in ME3 they are conquered by Wrex early on.

Because it was easier for EA to re-use krogan assets rather than creating a new alien race. Its the same reason you are killing thousands of human "raiders" despite the fact that there are only 20,000 humans in the entire galaxy

Pretty sure there were a few on Havarl as well

Because the game would have sucked without them.

I think it's too bad that they didn't include more of the background that's shown in the book in the game itself. Considering that they created all this backstory, I don't see why they wouldn't at least have a decent length codex entry with a summary. After all, significantly more people are going to play the game than read the book, so wouldn't the writers want people to know that they actually did come up with a rationale?

I doubt that it's a matter of who "Chose" what race to participate, rather than who has the assets to participate.

The AI was underfunded until the benefactor joined in. It wasn't an official Council project, though it may have required sanctions and some funding support. These were Civilian Explorers. Not Council.

So, if a Race wanted to participate in the Andromeda Initiative, they would have had to

1) had enough assets to pitch in, either in form of resources (Monetary or not, including labor, materials or skills).

2) could rally enough participants to propel a racial propagation (It wouldn't do to transplant a hundred krogans.)

hence, the most likely races fell to those major races, Asari, Turians, Salarians. Humans also pitch in.

My only qualms about this is that after the finale, Asari have recovered most of their Ark, and though diminished the Turians still have about 10,000 to 15,000. The Salarians only need a smaller number to propagate, and they still have recovered their ark.
I get that through Drack, we've seen that the Krogan can live practically as long as nothing kills them. Still, the Viable count to propagate a species requires more than robustness, but genetic variability, which in-coda humans have been pegged as most diverse, and most other species less so.

Furthermore, there is no Krogan Ark. Krogan are seeded along the Nexus, and possibly other Arks(?), and I don't think that the Nexus carried anything north of 10,000 Krogan. Typically a Minimum Viable Population is considered around the 5,000 head count, accounting for genetic diversity. Adding into these figures is the sterility of the Krogan with a rate of 4% to avoid stillbirth (improved from 0.1% to avoid stillbirth for Milkyway pre ME3 Krogan, due to Cryosleep Gene therapy). That is still one in twenty five surviving.

In contrast, Human Real life stillbirth rate is 0.5%, that is 99.5% chance to avoid stillbirth.

That still a ballpark figure of 125,000 Krogan required to overcome the residual effects of the genophage and ensure they can avoid incest. And these figures are not a midterm goal, but an initial requirement (Genetic diversity, not population expansion).

So while 1) Resources, could have been overcome by a sudden out of the blue Nakmor engineering, 2) Minimum Viability Count does not suffice.

I AM talking about ME level tech, following in-game logic of the "Genophage" only adding basic arithmetic. 

If you're going to throw at me citations on somatic cell germ line transformation for the purpose of creating a zygote in a sterile subject, then i have to ask you why didn't the Krogan do this yet to cure the Genophage? 

The percentage of 0.1% to 4% stillbirth avoidance was lifted from the Codex. 

The only Out of Canon numeric are the Minimum Viable Population, which however is concurred by in game dialogue that considers people of the Hyperion hard pressed and considers every viable member required to procreate. 

Even without the math, you have to wonder what ship the Krogan came in on with enough numbers to procreate
- given their not completely cured Genophage
- given they don't have their own Ark


P.S. And what do you mean by "what you state is an outdated method when we had no grasp on genetics and stem cells"?
Population genetics and variations are the fulcrum of all that we know about ... well... genetics. These statistics are numbers that were given since genetics became a thing. If you were a serious geneticist, or at least had any higher level education in biology, you wouldn't discount the population statistics aspect of Genetics, since it's basically the bread and butter of genetics. 
Here's a recent Article, published in 2014, which I believe is a time that was blessed by the enlightenment of genetics and stem cells.
Acta Astronautica 2014: 97; 16–29 Estimation of a genetically viable population for multigenerational interstellar voyaging: Review and data for project Hyperion !!! The study estimates an interstellar travel for 150 years and 5 generations require a population 14,000 to 44,000 people, considering for increasing chances of inbreeding, depresssion etc.



P.P.S. The iPS methods for creating somatic stem cells aren't really that viable or magical. It's also one of the lines of research that is muddled in a lot of hoaxes and controversies. Especially since the very next month on the article you cited (Jan 2016) Japan was embroiled in one of their biggest stem cell frauds (Feb 2016). So, while this has less to do with Mass Effect (Let me make it clear, I'm not the one who cited 'Stem Cells' or other modern tech, here) I find it amusing that you've cherrypicked that particular example.