QTL mapping of high digestibility trait in sorghum bicolor (L.) Moench

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Title: QTL mapping of high digestibility trait in sorghum bicolor (L.) Moench
Author: Winn, Jennifer Ann
Abstract: As compared with other cereal grains , Sorghum bicolor shows very low levels ofprotein digestibility when exposed to proteolytic enzymes . Protein digestibility furtherdecreases when sorghum is cooked . It is speculated that low digestibility is the result ofextensive disulfide crosslinking in the - and -kafirins (storage proteins ) surroundingthe endosperm protein bodies . The degree of crosslinking increases as sorghum iscooked , causing the highly digestible -kafirins found at the interior of protein bodies tobe locked within a tightly bound capsule , inaccessible to digestive enzymes . In thisresearch project , two major QTLs were found to be associated with proteindigestibility ?one QTL unfavorably affecting digestibility and one QTL favorablyaffecting digestibility . By identifying the QTLs and the linked markers corresponding tothe highly digestible trait , breeders will be able to use marker -assisted selection toquickly and accurately identify highly digestible lines to advance in a breeding program .
URI: http : / /hdl .handle .net /1969 .1 /ETD -TAMU -2582
Date: 2009-05-15

Citation

QTL mapping of high digestibility trait in sorghum bicolor (L.) Moench. Available electronically from http : / /hdl .handle .net /1969 .1 /ETD -TAMU -2582 .

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