I don't know, hamme, I do not deal with abiogenesis.
ETA: How does this relate to the original point, anyway? You asked for the selective pressures which would lead to the formation of the first novel genes. I proved an example of one. Why, then, did you switch to abiogenesis?
Because as scientists actually explain factually the powers which he ascribes to his "intelligent designer" (he only reads outdated creationist texts from what I can tell of his "arguments")--he has to find some other role for his god...So since we can't yet know how the first self replicating DNA came to be, that means his "intelligent designer" could have done it (or at least that means it to him.) Of course, we have fantastic theories and pieces of the puzzle and we are getting a finer tuned understanding all the time--remember, we didn't know how abundant the stuff of life was--because we couldn't see it until we invented microscopes strong enough to get a glimpse of such things. It's all over...not just in the oceans--but in the air too. He has an emotional investment in us not being able to explain it to him.
Creationists are experts at moving the goal posts. However, they tend to be very poor with their dialogue skills and can't be understood very well...not even by each other it seems. It's sort of like the Christians who all think their sect is truly Christian and they'll be glad to tell you who the "pseudo Christians" are (Catholics, Mormons, fundies, anyone who doesn't belong to your sect, etc.) --Oddly enought, their "intelligent designers" all seem to have different rubrics for achieving salvation, but they'll tell you they all believe in the same "god"--for Hammy that appears to be the one in charge of making proto self replicator molecules stick to each other.
Although abiogenesis is not your field, I'm sure you can make more sense out of quote below about it. Compare that bit of understanding you can glean to anything said by Hewitt, Hammy, or Kleinman. These guys have convinced themselves that everyone is too stupid to understand them. But
nobody is understanding them. Actual facts are pretty well understood by everybody--although creationists have a much harder time understanding them than those living in the reality based community.
These chains are proposed as the first, primitive forms of life. In an RNA world, different forms of RNA compete with each other for free nucleotides and are subject to natural selection. The most efficient molecules of RNA, the ones able to efficiently catalyze their own reproduction, survived and evolved, forming modern RNA.
Competition between RNA may have favored the emergence of cooperation between different RNA chains, opening the way for the formation of the first proto-cell. Eventually, RNA chains randomly developed with catalytic properties that help amino acids bind together (peptide-bonding). These amino acids could then assist with RNA synthesis, giving those RNA chains that could serve as ribozymes the selective advantage. Eventually DNA, lipids, carbohydrates, and all sorts of other chemicals were recruited into life. This led to the first prokaryotic cells, and eventually to life as we know it.
Cells are sort of like mini communities...and organisms are like communities of cells...it's all built from the bottom up via selection--just like actual communities and forum communities and ecosystems. Nobody needs to intend whatever it is communities become-- Creationists somehow see this selection process that anyone can understand as "chaos magically leading to complexity"--they just can't understand the ratcheting...the selection...no matter how many times or how many people explain it.