Registration of cultivars: registration of "Nutrisweet Corn"
1999
Burgonio, A.B. | Logrono, M.L. | Rodriguez, F.M. (Philippines Univ. Los Banos, College, Laguna (Philippines). Inst. of Plant Breeding)
"Nutrisweet" corn (Zea mays L.) was developed by the Institute of Plant Breeding, College of Agriculture, University of the Philippines, Los Banos, College, Laguna [Philippines] and registered at IPB GRRO as IPB33161. This was made commercially available in 1994. "Nutrisweet" is a yellow, double endosperm mutant, open-pollinated variety having the brittle (bt) and opaque (o2) genes which are responsible for the supersweet taste and high concentrations of two essential amino acids, respectively. Sweetness is attributed to one of the parents, HS 9, which possess the bt gene. High levels of trytophan and lysine is attributed to the other parent, Hlc li, which carry the o2 gene. This cultivar was developed by a series of selfing, testcrossing and recombination. Lines from F2 population possessing the desired Kernel type were selfed and testcrossed to the o2 donor. Selected lines which are homozygonous for the desired kernel type were recombined to form the initial population. Yield trials showed that marketable ear yield of "Nutrisweet" were comparable to the check variety, Asuka. Biochemical evaluation showed significant improvement in quality of nutrient, exhibiting high levels of lysine (0-88%) and tryptophan (1.02%) (Fig. 1) Breeder seeds of "Nutrisweet" are produced by the Cereals Division, Institute of Plant Breeding, U.P. at Los Banos, College, Laguna
显示更多 [+] 显示较少 [-]