SEARCH
0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Prev | Current Page 418 | Next

Darwin, Charles, 1809-1882

"Effects of Cross and Self Fertilisation in the Vegetable Kingdom"


Petunia violacea (Fourth generation).
Although the crossed plants were to the self-fertilised in height as 100
to 69, yet in three out of the five pots a self-fertilised plant
flowered first; in the fourth pot simultaneously, and only in the fifth
did a crossed plant flower first.
Nicotiana tabacum (First Generation).
The crossed plants were to the self-fertilised in height only as 100 to
178, and a self-fertilised plant flowered first in all four pots.
Nicotiana tabacum (Third Generation).
The crossed plants were to the self-fertilised in height as 100 to 101,
and in four out of the five pots a self-fertilised plant flowered first.
Canna warscewiczi.
In the three generations taken together the crossed were to the
self-fertilised in height as 100 to 101; in the first generation the
self-fertilised plants showed some tendency to flower first, and in the
third generation they flowered first in nine out of the twelve pots.
SPECIES IN WHICH THE CROSSED AND SELF-FERTILISED PLANTS FLOWERED ALMOST
SIMULTANEOUSLY.
Mimulus luteus (Sixth Generation).
The crossed plants were inferior in height and vigour to the
self-fertilised plants, which all belonged to the new white-flowered
tall variety, yet in only half the pots did the self-fertilised plants
flower first, and in the other half the crossed plants.
Viscaria oculata.
The crossed plants were only a little taller than the self-fertilised
(namely, as 100 to 97), but considerably more fertile, yet both lots
flowered almost simultaneously.


Pages:
406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430

404 Not Found

404 Not Found

404 Not Found