( ( CROSS ( ( ( A breeding ) ( of ( ( one variety ) ( of ( grape ( with another ) ) ) ) ) ) ( to ( obtain ( a ( ( more desirable ) offspring ) ) ) ) ) ) . )
(ROOT (S (VP (VBZ CROSS) (S (NP (NP (DT A) (NN breeding)) (PP (IN of) (NP (NP (CD one) (NN variety)) (PP (IN of) (NP (NP (NN grape)) (PP (IN with) (NP (DT another)))))))) (VP (TO to) (VP (VB obtain) (NP (DT a) (ADJP (RBR more) (JJ desirable)) (NN offspring)))))) (. .)))
CROSS A breeding of one variety of grape with another to obtain a more desirable offspring.
(ROOT (S (NP (JJ Selective) (NN breeding)) (VP (VBZ involves) (S (VP (VBG choosing) (NP (JJ certain) (NNS organisms)) (S (VP (TO to) (VP (VB reproduce) (PP (IN with) (NP (CD one) (DT another))) (SBAR (IN in) (NN order) (S (VP (TO to) (VP (VB pass) (PP (IN on) (NP (JJ specific) (, ,) (JJ desirable) (NNS traits))) (PP (TO to) (NP (PRP$ their) (NN offspring))))))))))))) (. .)))
Selective breeding involves choosing certain organisms to reproduce with one another in order to pass on specific, desirable traits to their offspring.