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Plant species where normal mode of seed set is through a high degree of cross-pollination have characteristic reproductive features and population structure. Existence of self-sterility, [ 1 ] self-incompatibility, imperfect flowers, and mechanical obstructions make the plant dependent upon foreign pollen for normal seed set.
Yellow squash that were resistant to at first two, then three viruses were developed, beginning in the 1990s. The viruses are watermelon, cucumber and zucchini/courgette yellow mosaic. Squash was the second GM crop to be approved by US regulators. The trait was later added to zucchini. [169]
Squash blossoms are highly perishable, and as such are rarely stocked in supermarkets. [2] Male and female squash blossoms can be used interchangeably, but picking only male flowers (leaving some for pollination ) [ 3 ] allows the plant to also produce some fruit (squash).
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Another French study of poisoning from bitter squash consumption found similar acute illnesses and no deaths. [20] The high concentration of toxin in the plants could result from cross-pollination [21] with wild cucurbitaceae species, or from plant growth stress due to high temperature and drought. [22]
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Cucurbita pepo is a cultivated plant of the genus Cucurbita.It yields varieties of winter squash and pumpkin, but the most widespread varieties belong to the subspecies Cucurbita pepo subsp. pepo, called summer squash.
Cross-pollination with toxic types can cause bitterness in plants of the next generation, and these should not be eaten. The flowers and young leaves and shoot tips can also be consumed. [ 118 ] The seeds and fruits of most varieties can be stored for long periods of time, [ 5 ] particularly the sweet-tasting winter varieties with their thick ...