Beyonce, Queen Latifa and other African-American pop icons who have recently gone blond can use  a  scientific basis as a reason for their fashion choice now that scientists have established a blond gene in Africans in the South Pacific.   The native inhabitants of the Solomon Islands – east of Papua New Guinea – are very dark-skinned – but have puzzled scientists for decades with their blond hair.  The ancestors of these native inhabitants migrated from Southeast Asia and had originated in Africa 50,000 to 70,000 years ago.

Now a genetic study has found that the islanders have a ‘homegrown’ gene that gives them blond hair – and it’s different from the one in Europeans.

‘Its frequency is between 5 and 10 percent across the Solomon Islands, which is about the same as where I’m from,’ said study author Eimear Kenny, PhD, who was born in Ireland.

Globally, blond hair is rare, occurring with substantial frequency only in northern Europe and in Oceania, which includes the Solomon Islands and its neighbours.

Many assumed the blond hair of Melanesia was the result of gene flow — a trait passed on by European explorers, traders and others who visited in the preceding centuries.

The islanders themselves give several possible explanations for its presence – they generally chalked it up to sun exposure, or a diet rich in fish, say the researchers.

‘Within a week we had our initial result. It was such a striking signal pointing to a single gene — a result you could hang your hat on. That rarely happens in science,’ said Kenny‘It was one of the best experiences of my career.’

In terms of genetic studies, the analysis was straightforward, said Kenny.

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But gathering the data, accomplished in 2009 by Myles and co-first author Nicholas Timpson, PhD, was more difficult. Much of the Solomon Islands is undeveloped, without roads, electricity or telephones.

It’s also one of the most linguistically diverse nations in the world, with dozens of languages spoken.

‘They have this very dark skin and bright blond hair. It was mind-blowing,’ said Myles. ‘As a geneticist on the beach watching the kids playing, you count up the frequency of kids with blond hair, and say, ‘Wow, it’s 5 to 10 percent.’

Myles and Timpson went village to village explaining what they wanted to do and asking for permission to gather data, Myles speaking in Solomon Islands pidgin, the most widely understood language.

When the local chief gave the OK, the researchers recruited participants and assessed hair and skin colour using a light reflectance meter, took blood pressure readings and measured heights and weights.

They asked the villagers to spit into small tubes to provide saliva to be used for DNA extraction. In the span of a month, they collected more than 1,000 samples.

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Soon after, Kenny joined the lab and started the analysis, selecting 43 blond- and 42 dark-haired Solomon Islanders from the opposite 10 percent extremes of the hair pigmentation range.

She used these in a genome-wide association study, a method to reveal differences in the frequency of genetic variants between two groups, that usually requires thousands of samples.

Because the vast majority of human physical characteristics analysed to date have many genetic and environmental factors, Kenny expected an inconclusive result that would require much further study. Instead, she immediately saw a single strong signal on chromosome 9, which accounted for 50 percent of the variance in the Solomon Islanders’ hair colour.

The team went on to identify the gene responsible, TYRP1, which encodes tyrosinase-related protein 1, an enzyme previously recognised as influencing pigmentation in mice and humans. Further research revealed that the particular variant responsible for blond hair in the Solomon Islands is absent in the genomes of Europeans.

‘So the human characteristic of blond hair arose independently in equatorial Oceania. That’s quite unexpected and fascinating,’ Kenny said.

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  1. – Thanks ladies! Emma, I feel the same way. I’m still wishy washy about it I just don’t see mylsef with this hair color. Metta, I was in that in between place too and felt like it needed to either be light or dark, but now that I’ve gone this route I keep seeing all sorts of women with gorgeous in between hair. Sigh.Dena, everyone keeps mentioning the shade matches my eyes. Hopefully that’s a good thing?Thanks Cathie!October 17, 2010 5:21 PM

  2. – I dyed my hair just about that color in France back in the day and well let’s just say that it did not look good on me, but I’m liking it on you! And c’mon you’re linaevg me behind being the only non-dark haired Mudrick around! It’s a good thing I’ve got all those nieces and nephews with blond hair still to help me feel a little more like family.October 15, 2010 1:15 PM

  3. So stinkin’ cute!!! They look clteoemply different to me. I would not put them together as brothers. Maybe they look more alike than I can see though either way, they are so cute!!! You do such good work. I love the colors.

  4. “Africans in the South Pacific” ?????????????
    You are talking about Solomon Islandars, calling them African suggests all Africans have dark skin….
    As far as I know Solomon people have more in common (genetically) with Europeans than with Africans.
    In other words: you don’t have to be African to be black and you don’t have to be black to be African.

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