Patents Assigned to Ruk Zwaan Zaadteelt en Zaadhandel B.V.
  • Patent number: 9556493
    Abstract: The present invention relates to a Lactuca sativa seed designated 41-115 RZ, which may exhibit a combination of traits including resistance against downy mildew (Bremia lactucae Regel) races Bl:1 to Bl:30 and Ca-I to Ca-VIII, currant lettuce aphid (Nasonovia ribisnigri) biotype Nr:0, and corky root rot (Sphingomonas suberifaciens), as well as very thick, weakly blistering, mature non-flabellate leaves having a shallowly dentate leaf margin, and broad base leaves. The present invention also relates to a Lactuca sativa plant produced by growing the 41-115 RZ seed. The invention further relates to methods for producing the lettuce cultivar, represented by lettuce variety 41-115 RZ.
    Type: Grant
    Filed: May 21, 2015
    Date of Patent: January 31, 2017
    Assignee: RUK ZWAAN ZAADTEELT EN ZAADHANDEL B.V.
    Inventors: Maria Helena Roosenboom-Kooijmans, Willem van Vliet
  • Patent number: 8772578
    Abstract: The present invention relates to a Lactuca sativa L. var. longifolia Lam seed designated as 41-53 RZ, which has leaves with a solid main vein, narrow base leaves, and exhibits resistance against downy mildew (Bremia lactucae Regel), currant-lettuce aphid (Nasonovia ribisnigri) and lettuce mosaic virus (LMV). The present invention also relates to a Lactuca sativa L. var. longifolia Lam plant produced by growing the “41-53 RZ” seed. The invention further relates to methods for producing the lettuce cultivar, represented by lettuce variety 41-53 RZ.
    Type: Grant
    Filed: January 20, 2009
    Date of Patent: July 8, 2014
    Assignee: Ruk Zwaan Zaadteelt en Zaadhandel B.V.
    Inventor: Aad Ammerlaan