( ( Some ( of ( the varieties ) ) ) ( ( are ( products ( of ( ( ( conventional breeding ) , ) ( where ( ( offspring ( with ( the ( ( most desirable ) traits ) ) ) ) ( are ( chosen ( to reproduce ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT Some)) (PP (IN of) (NP (DT the) (NNS varieties)))) (VP (VBP are) (NP (NP (NNS products)) (PP (IN of) (NP (NP (JJ conventional) (NN breeding)) (, ,) (SBAR (WHADVP (WRB where)) (S (NP (NP (NN offspring)) (PP (IN with) (NP (DT the) (ADJP (RBS most) (JJ desirable)) (NNS traits)))) (VP (VBP are) (VP (VBN chosen) (S (VP (TO to) (VP (VB reproduce)))))))))))) (. .)))
Some of the varieties are products of conventional breeding, where offspring with the most desirable traits are chosen to reproduce.
(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.