Hayes and Garber - Cucurbit Breeding

BREEDING OF VEGETABLES 255
Cucumis sativus Cucumber
Cucumis melo Muskmelon, cantaloupe
Cucurbita pepo Pumpkin, gourd, summer squash, and
varieties of winter squash. Peduncle
hard and ridged.
Cucurbita maxima Large field squash and winter squash.
Peduncle soft and fleshy.
Cucurbita moschata Squash. Little grown in United
States. Peduncle much enlarged where
CitruLlus vulgaris
attached to fruit.
Watermelon, citron.
FIG. 61. Structure of flowers of squash.
1. Female flower
2. Male flower.
a, corolla; 6, calyx; c, fruit.
3. Male flower with calyx and corolla removed.
4. Female flower with calyx and corolla removed showing a, stigma; b, style;
c, point of attachment of calyx and corolla; d, undeveloped fruit.
5. 6. Longitudinal and cross sections of fruit.
Size: 1, 2, Yn\ 3, 4, >ri.
Cummings (1904) experienced no great difficulty in crossing
Golden Custard (9) with Crookneck (cT), varieties of squashes
belonging to C. pepo. The reciprocal cross proved difficult, only
five out of 284 pollinations producing fruit with viable seed.
histological examination revealed the fact that the male generative
A