There is no doubt that Yellow lupins are suitable as an ingredient in the diet of pigs from weaning through until slaughter. While no research has been conducted on feeding this variety to breeding stock, there is no reason to believe that it would not be a suitable source of energy and amino acids. Whether it will become a significant ingredient in pig diets will depend on its availability and price.
Mullan, Bruce P.
"Yellow lupins for the pig industry,"
Journal of the Department of Agriculture, Western Australia, Series 4: Vol. 42
, Article 12.
Available at: http://researchlibrary.agric.wa.gov.au/journal_agriculture4/vol42/iss1/12