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Post by mayz on Sept 3, 2012 4:58:24 GMT -5
Four seeds of double red under surgical operation on the left pericarpless and aleuronless so endosperm is visible. The white seed is carotene free and the yellow one is able to synthetize carotene. lower right pericarpless seed. The aleurone is lightly red colored and the yellow color of endosperm is visible by transparency. upper right normal seed showing its deep red pericarp. Attachments:
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Post by raymondo on Sept 3, 2012 21:10:11 GMT -5
So Double Red has a mix of endosperm colours? Was it difficult peeling off the pericarp and aleurone?
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Post by oxbowfarm on Sept 3, 2012 22:44:41 GMT -5
I didn't even realize that the aleurone would come off!
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Post by Deleted on Sept 4, 2012 8:44:27 GMT -5
This is an interesting article dealing with pericarp color inheritance in maize: www.ncbi.nlm.nih.gov/pmc/articles/PMC1200761/pdf/466.pdfDouble Red has a cherry pericarp, rather than a true red like most other "red" corns. It is only found on deep purple or purple-tinged plants that also have at least some dark purple in the anthers. The cherry color gene can be expressed with or without the purple / blue aleurone trait.
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Post by mayz on Sept 5, 2012 4:16:05 GMT -5
So Double Red has a mix of endosperm colours? Was it difficult peeling off the pericarp and aleurone? I guess yellow endosperm was due to xenia effect. There's large fields of yellow flint-dent corn near my garden. In addition on an entire ear I found only 11 seeds possessing a yellow endosperm. More certainty in a few weeks when the cross Mirai x Double red and the reciprocal one will be mature. With fresh seed the pericarp is readily peeled off but the aleurone is somewhat sticky. The red pigments of the pericarp (phlobaphenes) are polymers of flavanol so their synthesis needs nearly (until A1) the entire anthocyanin pathway and of course the presence of pericarp color1 (coding for a transcriptional activator of A1 in the pericarp).
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Post by mayz on Sept 17, 2012 6:19:03 GMT -5
So Double Red has a mix of endosperm colours? After examination of several dry seeds I can answer DB is mainly yy (white) but there is some Y_ (yellow) kernels. But that seems obvious as it's very difficult to cull yellow kernels when the seed is fully mature. So are yellow kernels unculled xenia kernels? Or normaly present? only mushroom has the answer.
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Post by Andre on Jul 5, 2013 10:03:24 GMT -5
So the name "Double Red" stands for red aleurone + red pericarp ?
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