Selection of methionine-enriched soybean seeds

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Date
2003-01-01
Authors
Imsade, John
Scott, M. Paul
Scott, Marvin
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Agronomy
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Agronomy
Abstract

Protein accounts for approximately 40 % of the dry weight of a soybean seed; how­ ever, soy protein is deficient in both cysteine and methionine. To overcome this sulfur deficiency, animal feeders supplement soy protein rations with costly methio­ nine, which is more stable than cysteine. To alleviate the need for methionine supplementation, we mutagenized seeds and selected genetic soybean lines, the protein of which is enriched approximately 20 % for both cysteine and methionine. Animal rations prepared from these genetic lines should not require methionine supplemen­tation.

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This is a chapter from J. Imsande and M.P. Scott (2003) Selection of methionine-enriched soybean seeds. pp. 239-241. In: Sulfur transport and assimilation in plants, J.-C. Davidian, D. Grill, L. J. De Kok, I. Stulen, M. J. Hawkesford, E. Schnug and H. Renneberg, Eds., Backhuys, Leiden, The Netherlands.

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