When a sugarcane crop is harvested, the root systems can be left to sprout new canes, which are known as ratoons. Several successive ratoon crops may be taken from one field, and they are known as first ratoon, second ratoon, etc. However, the yields of the successive ratoons gradually decline, and there is a limit to the number of ratoons that can be commercially viable. The first crop to be harvested, before any ratoons are taken, is known as the 'plant crop'. Recessive character

A genetic character, or an allele, is described as recessive when it is eclipsed by the dominant allele. Reciprocal cross

A second cross, which is similar to the first except that the sexes of the parents are interchanged. For example (A9 x B^) is the reciprocal cross of (A^ x B$).

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