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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.
Honey bees, squash bees, bumblebees, leafcutter bee (in greenhouse pollination), solitary bees (for some parthenocarpic gynoecious green house varieties pollination is detrimental to fruit quality) fruit 3-great 1-2 temperate Squash, pumpkin, gourd, marrow, zucchini: Cucurbita spp. Honey bees, squash bees, bumblebees, solitary bees: fruit 4 ...
Spaghetti squash has a great party trick: After halving and removing the seeds, roasting or microwaving it, you scrape out the flesh with a fork, and it forms strands, like spaghetti (hence the name).
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]
In his cross-pollination experiments involving two true-breeding, or homozygous, parents, Mendel found that the resulting F1 generation was heterozygous and consistent. The offspring showed a combination of the phenotypes from each parent that were genetically dominant. Mendel's discoveries involving the F1 and F2 generations laid the ...
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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]
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 ...