The invention provides seed and plants of the lettuce sister lines designated PX06514083, PX06514153, PX06514201 and PX06514204. The invention thus relates to the plants, seeds and tissue cultures of these sister lines, and to methods for producing a lettuce plant produced by crossing a plant of sister line PX06514083, PX06514153, PX06514201 or PX06514204 with itself or with another lettuce plant, such as a plant of another line. The invention further relates to seeds and plants produced by such crossing. The invention further relates to parts of such a sister line, including the gametes of such plants.
