somewhat odd black eyed pea question

[blueadzuki]

This has absoultely NOTHING to do with gorwing or eating seed. but here goes. does anyone know if there is an official term for the seed coat pattern black eyed peas have (a base color with a round to symetrically irregular patch of another color around the hilum). I am trying to get some identification information on some soybeans I found and tried to grow this year that had the same coat pattern) but when I put "black (or, in this case, brown) eyed soybeans" into the seach engine, all I get is mentions of the color of the hilum itself (which I know is a different thing). So is there some generally accepted term I need to know to look for the kind of info I am seekins (similar to how I started finding information on spotted corn when I found out that most plant people call it "stippled" or "mottled"?"

[raymondo]

I don't know but in a research paper on seed coat patterns in cowpea the term hilum ring is used to refer, I think, to the pattern of black-eyes.

[blueadzuki]

You wouldn't happen to have a link to that paper, would you, might be interesting reading, plus give me a clue how to keep my one blue cowpea seed from having all of it's color swamped out by it's neighbors pollen (should a passing bee take a shine to it). I used that term you suggested, but the only referece I found was to brown rings casued by virus damage.
That's probably part of the problem, infomation on coat color heredity in soybeans is pretty sparse; I knew that coming into the search. A lot of agricultural soybean classification systems her in the US (the kind used say by farmers selcting the type of soy the want, or plant breeders looking to breed new soy strains) don't even bother to mark off coat color and pattern at all, just hilum color. part of it, of course is that practically all soy grown on a farm scale in this country only comes in two colors, white (yellow) and black. Most "food grade" soy (like for tofu and soy protein) users specify clear eyed white (for the rest of this thread I'm going to use eye for hilum color, becuse thats what the industry does, don't get confsued with the "eyed" soy I mentioned in the orginal. brown and black eyed whites are usually for animal feed. and black skinned are usually used to make things like soy sauce and black bean sauce. In Asia it appears to be mostly the same, whites mostly for tofu (though brown and black eyed whites are equally commonly used as clears). Blacks are usully used for soy sauce or fermented black bean paste as are blacks with green insides (in fact that could explain why on a cultivation scale most green inside types are green and yellow inside mixed (unsegregated) since they are mostly used for fermented products where they all turn brown anyway, it probably makes no difference.) There are of course some green when mature, brown and even a few two tones (like agate) in the edamame strains but as edamame is eaten when it is still green I'm not sure that mature color was a factor in selection.

[grunt]

Try this for a search = hilum ring color in cowpeas. I think you will find what you are after.

www.ajol.info/index.php/gjs/article/viewFile/15860/16333

looks like it is what you are after

[raymondo]

Nov 11, 2011 12:46:21 GMT -5 blueadzuki said:

You wouldn't happen to have a link to that paper, would you, might be interesting reading, plus give me a clue how to keep my one blue cowpea seed from having all of it's color swamped out by it's neighbors pollen (should a passing bee take a shine to it).

Here's the link, onlinelibrary.wiley.com/doi/10.1111/j.1439-0523.1988.tb00226.x/abstract, but I suspect you'll only be able to read the abstract. I can download the article but cannot post it here because of the size restriction. If you would like the article just PM your email address.

The article that Dan linked to also looks interesting.