Classic Methods of Plant Breeding

Question 1

The breeding methods that have proved successful with self-pollinated species are

Answer 1

(1) mass selection; (2) pure-line selection; (3) hybridization, with the segregating generations handled by the pedigree method, the bulk method, or by the backcross method; and (4) development of hybrid varieties.

Question 2

Is often described as the oldest method of breeding self-pollinated plant species. As an ancient art, farmers saved seed from desirable plants for planting the next season’s crop, a practice that is still common in the agriculture of many developing countries. This method of selection is applicable to both self- and cross-pollinated species.

Answer 2

Mass selection

Question 3

Breeding starts with the crossing of two genotypes, each of which have one or more desirable characters lacked by the othe

Answer 3

Pedigree

Question 4

The most important methods ofbreedingcross-pollinated species are

Answer 4

(1) mass selection; (2) development of hybrid varieties; and (3) development ofsyntheticvarieties. Since cross-pollinated species are naturally hybrid (heterozygous) for many traits and lose vigour as they become purebred (homozygous), a goal of each of these breeding methods is to preserve or restore heterozygosity.

Question 5

Developed by intercrossing a number of genotypes of known superior combining ability—i.e., genotypes that are known to give superiorhybridperformance when crossed in all combinations

Answer 5

Syntheticvariety

Question 6

Is the F1 offspring of a planned cross between inbred lines, cultivars, clones, or populations

Answer 6

hybrid cultivar