Origin of Species Variorum

↑ 1 blocks not present in 1859 1860 1861 1866 1869; present in 1872

A large number of individuals of an animal or plant can be reared only where the conditions for its propagation are favourable.

→ of any species 1859 1860 1861 1866 1869

OMIT 1872

→ the individuals, 1859 1860 1861 1866 1869

will be allowed to breed, 1872

→ will generally be allowed to breed, 1859 1860 1861 1866 1869

OMIT 1872

→ point of all is 1861 1866 1869

point of all, is, 1859 1860

element is 1872

→ useful to man, or so much 1859 1860 1861 1866 1869

OMIT 1872

→ there appeared (aided by some crossing with 1859 1860 1861 1866 1869

(with some aid by crossing 1872

→ which have been raised 1859 1860 1861 1866 1869

were raised which have appeared 1872

→ thirty or forty years. 1859 1860 1861 1866 1869

half-century. 1872

→ In the case of animals with separate sexes, 1859 1860 1861 1866 1869

With animals, 1872

nurserymen, from

keeping

raising

large stocks of the same

plant,

plants,

are generally far more successful than amateurs in

raising

getting

new and valuable varieties. ↑ The keeping of a large number of individuals of a species in any country requires that the species should be placed under favourable conditions of life, so as to breed freely in that country. When the individuals →of any species are scanty, all →the individuals, whatever their quality may be, →will generally be allowed to breed, and this will effectually prevent selection. But probably the most important →point of all is that the animal or plant should be so highly →useful to man, or so much valued by

man,

him,

that the closest attention

should be

paid to even the slightest

deviations

deviation

its

the

qualities or

structure.

structure

~~each~~

each

~~individual.~~

individual.

Unless such attention be paid nothing can be effected. I have seen it gravely remarked, that it was most fortunate that the strawberry began to vary just when gardeners began to attend

~~closely~~

closely

to this plant. No doubt the strawberry had always varied since it was cultivated, but the slight varieties had been neglected. As soon, however, as gardeners picked out individual plants with slightly larger, earlier, or better fruit, and raised seedlings from them, and again picked out the best seedlings and bred from them,

then

then,

→there appeared (aided by some crossing with distinct species) those many admirable varieties of the strawberry →which have been raised during the last →thirty or forty years.

→In the case of animals with separate sexes, facility in preventing crosses is an important element

~~of success~~

of success

in the formation of new races, — at least, in a country which is already stocked with other races. In this respect enclosure of the land plays a part. Wandering savages or the inhabitants of open plains rarely possess more than one breed of the same species. Pigeons can