Lettuce variety 45-125 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 45-125 RZ, which exhibits resistance to downy mildew (Bremia lactucae) races Bl:1-28 Ca-I to Ca-VIII, and strain 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 45-125 RZ seed. The invention further relates to methods for producing the lettuce cultivar, represented by lettuce variety 45-125 RZ.
Claims34
Lettuce plant exhibiting a combination of traits including resistance to downy mildew (Bremia lactucae) races Bl:1-28 Ca-I to Ca-VIII, and strain 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. 42133.
Lettuce plant designated 45-125 RZ, representative seed of which having been deposited under NCIMB Accession No. 42133.
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 strain 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 strain 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 strain 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. 42133.
A method of introducing a desired trait into a plant of lettuce variety 45-125 RZ comprising:
- (a) crossing a plant of lettuce variety 45-125 RZ, representative seed of which having been deposited under NCIMB Accession No. NCIMB 42133, 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 45-125 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 45-125 RZ, when grown in the same environmental conditions.
The method of claim 26 further comprising (e) repeating steps (c) and (d) one or more times in succession to produce selected fourth or higher backcross progeny that comprise the desired trait and all of the physiological and morphological characteristics of a plant of lettuce variety 45-125 RZ, when grown in the same environmental conditions.
A method for producing a seed of a 45-125 RZ-derived lettuce plant comprising (a) crossing a plant of lettuce variety 45-125 RZ, representative seed of which having been deposited under NCIMB Accession No. NCIMB 42133, with a second lettuce plant, and (b) whereby seed of a 45-125 RZ-derived lettuce plant form.
Dependencies are inferred from the claim text.