Patent ID: 8772579
Filing Date: 2014-07-08
Classification: A01H

Abstract:
1. A lettuce plant having a trait of black seeds; a trait of green, round-shaped leaves; a multileaf trait; an extraordinarily low number of apices trait; a resistance to Bremia lactucae Regal trait, and genetic information in its genome for expressing the black seeds trait, the green, round-shaped leaves trait, the multileaf trait, the extraordinarily low number of apices trait and the resistance to Bremia lactucae Regal trait, wherein the multileaf trait is caused by a single recessive genetic factor which is present in the lettuce plant in a homozygous state whereby the lettuce plant has the multileaf trait and green, round-shaped leaves, wherein the multileaf trait includes that (i) at harvest maturity the fresh weight of the above-ground part of the lettuce plant expressing the multileaf trait is between 200 and 300 grams, and (ii) under the same environmental conditions, at the plant stage before bolting when the above-ground dry matter is between 100 and 400 grams, the lettuce plant expressing the multileaf trait grows at least about 2 to 4 times as many leaves as another lettuce plant of the same variety that is not homozygous as to the genetic information for expressing the multileaf trait, wherein the extraordinarily low number of apices trait includes that under warm environment conditions of between 15° C. and 25° C., the multileaf lettuce plant also expressing the extraordinarily low number of apices trait has at harvest maturity about 1 to 3 times lower number of apices than a multileaf lettuce plant at harvest maturity that does not express the extraordinarily low number of apices trait and was grown under the same warm environment conditions, wherein the resistance to wherein the genetic information for expressing the black seeds trait, the green, round-shaped leaves trait, the multileaf trait, the extraordinarily low number of apices trait and the resistance to