If a line will have a pair of chromosome from another species in addition to its own full somatic complement, the line is called as

Solution(By Examveda Team)

If a line will have a pair of chromosomes from another species in addition to its full somatic complement, the line is called an Alien addition line.
Alien addition lines are formed by adding one or more heterologous chromosomes from an alien donor species to the original genome of the recipient species.
Alien addition lines (MAALs), which carry an additional chromosome from a related species through interspecific/intergenomic hybridization, have become powerful tools for genetic and genomic research.