Lettuce variety 45-149 rz
AssigneeRijk Zwaan Zaadteelt En Zaadhandel B.V.
InventorsMaria Helena Roosenboom-Kooijman, Johannes Petrus Antonius Jansen, Willem van Vliet
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Abstract
The present invention relates to a Lactuca sativa seed designated 45-149 RZ, which exhibits resistance to downy mildew (Bremia lactucae) races Bl:1-28 Ca-I to Ca-VIII, and strains F837 and USA927, resistance to currant-lettuce aphid (Nasonovia ribisnigri), moderately glossy leaves, and a medium head size. The present invention also relates to a Lactuca sativa plant produced by growing the 45-149 RZ seed. The invention further relates to methods for producing the lettuce cultivar, represented by lettuce variety 45-149 RZ.
Claims34
Iceberg lettuce plant exhibiting a combination of traits including resistance to downy mildew (Bremia lactucae) races Bl:1-28 Ca-I to Ca-VIII, and strains F837 and USA927, resistance to currant-lettuce aphid (Nasonovia ribisnigri), moderately glossy leaves, and a medium head size, representative seed of which having been deposited under NCIMB Accession No. 42131.
Lettuce plant designated 45-149 RZ, representative seed of which having been deposited under NCIMB Accession No. 42131.
A tissue culture as claimed in claim 9, wherein said cells or protoplasts of the tissue culture which are derived from a tissue selected from the group consisting of leaves, pollen, embryos, cotyledon, hypocotyls, meristematic cells, roots, root tips, anthers, flowers, seeds and stems.
A method of producing a lettuce cultivar containing a combination of traits including resistance to downy mildew (Bremia lactucae) races Bl:1-28 Ca-I to Ca-VIII, and strains F837 and USA927, resistance to currant-lettuce aphid (Nasonovia ribisnigri), moderately glossy leaves, and a medium head size, comprising:
- crossing a mother lettuce plant with a father lettuce plant to produce a hybrid seed;
- growing said hybrid seed to produce a hybrid plant;
- selfing said hybrid seed to produce F2 progeny seed;
- selecting said F2-plants for exhibiting resistance to downy mildew (Bremia lactucae) races Bl:1-28 Ca-I to Ca-VIII, and strains F837 and USA927, resistance to currant-lettuce aphid (Nasonovia ribisnigri), moderately glossy leaves, and a medium head size, and, selfing said selected F2-plants to produce F3 progeny seed;
- selecting F3-plants for exhibiting resistance to downy mildew (Bremia lactucae) races Bl:1-28 Ca-I to Ca-VIII, and strains F837 and USA927, resistance to currant-lettuce aphid (Nasonovia ribisnigri), moderately glossy leaves, and a medium head size, optionally followed by more selfing and selection steps.
Lettuce plant having morphological and/or physiological characteristics of a lettuce plant, representative seed of which having been deposited under NCIMB Accession No. 42131.
A method of introducing a desired trait into a plant of lettuce variety 45-149 RZ comprising:
- (a) crossing a plant of lettuce variety 45-149 RZ, representative seed of which having been deposited under NCIMB Accession No. NCIMB 42131, with a second lettuce plant that comprises the desired trait to produce F1 progeny;
- (b) selecting an F1 progeny that comprises the desired trait;
- (c) crossing the selected F1 progeny with a plant of lettuce variety 45-149 RZ, to produce backcross progeny and (d) selecting backcross progeny comprising the desired trait and the physiological and morphological characteristic of a plant of lettuce variety 45-149 RZ, when grown in the same environmental conditions.
A method for producing a seed of a 45-149 RZ-derived lettuce plant comprising (a) crossing a plant of lettuce variety 45-149 RZ, representative seed of which having been deposited under NCIMB Accession No. NCIMB 42131, with a second lettuce plant, and (b) whereby seed of a 45-149 RZ-derived lettuce plant form.
Dependencies are inferred from the claim text.