Pumpkins, winter squash, and summer squash belong to the Cucurbita genus which is within the Cucurbitaceae family. Within the Cucurbita genus, there are four main species groups to which the varieties belong: C. Pepo, C. Maxima, C. Moschata, and C. Argyrosperma.
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The C. Maxima species includes: Atlantic giant (the world’s largest pumpkin/winter squash variety), the Cinderella pumpkin, Blue Hubbard squash, Big Max, Jarrahdale just to name a few. The C. Moschata species includes: Fairytale pumpkins, Long Island Cheese, Butternut squash, as well as several other varieties. Included within the C. Argyrosperma species are Cushaw variety winter squashes. While these species groups are different and unique, they are also very closely related.
https://wizzley.com/can-pumpkins-cross-pollinate-with-squashes/
Zucchini will not cross-pollinate with winter squash. Many varieties of zucchini are a result of cross-pollination themselves, including “Black Beauty,” “Vegetable Marrow White Bush,” “Chefini” and “Elite.” Zucchini does best in U.S. Department of Agriculture plant hardiness zones 3 to 11.
http://homeguides.sfgate.com/crosspollination-squash-zucchini-76582.html
These squash and pumpkin types also come in many different colors beyond the typical orange field pumpkin and yellow crook neck summer squash. These colors for other squash and pumpkin varieties include: white, yellow, tan, green, blue, red, and in some cases even pink. While many of these pumpkin and squash fruits are heirloom varieties, there are many that are hybrids that have been developed from cross breeding between the different types.
https://wizzley.com/can-pumpkins-cross-pollinate-with-squashes/
Manual. If you wish for cross-pollination between zucchini and other squash plants, hand-pollination is suggested to ensure cross-pollination. This method also allows you to cross-pollinate specific varieties, which is useful if you’re interested in controlling the color, taste and size of the fruit.
http://homeguides.sfgate.com/crosspollination-squash-zucchini-76582.html
Canning is not recommended because the tender summer squash will simply turn to mush during processing, unless you are making pickles. Zucchini can be substituted for cucumbers in some pickle recipes. The results are especially good in your favorite recipes for Bread and Butter Pickles.
http://extension.illinois.edu/veggies/ssquash.cfm
Fortunately, however, this is not true. The female flowers of each crop can be fertilized only by pollen from male flowers of the same species. Cross pollination, however, can occur between varieties within a species. Cross pollination can be seen in the squashes and pumpkins. Summer squash, pumpkins, gourds, and some types of winter squash belong to the same plant species Cucurbita pepo. All species members may cross with one another. Thus, an acorn squash will cross pollinate with a zucchini or a miniature gourd. However, muskmelon (Cucumis melo) and cucumbers (Cucumis sativus) belong to different species and will not cross with each other or members of the Cucurbita genus.
http://www.ipm.iastate.edu/ipm/hortnews/1996/8-23-1996/crosspol.html
Hand-pollination between zucchini and squash allows you to control what types are cross-pollinated. Known as one of the home garden’s most prolific producers, zucchini (Curcurbita pepo) is a type of summer squash. It can easily cross-pollinate with some other types of summer squash, and this is often very desirable as it can produce interesting variations.
http://homeguides.sfgate.com/crosspollination-squash-zucchini-76582.html
Vegetable Cross-Pollination Guide. Below is a table of what vegetable crops will cross-pollinate with other plants. It should be noted that vegetable varieties will cross-pollinate easily with other varieties of the same plant (eg. Carrot ‘St. Valery’ will cross pollinate with Carrot ‘Scarlet Nantes’).
http://theseedbank.net/articles-info-how-tos/vegetable-cross-pollination-guide/
In this section, summer squash varieties will be limited to zucchini, yellow squash (crooked and straight), pattypan which is also call scalloped and scallopini. Because summer squash is immature, the skin is very thin and susceptible to damage. Handle with care.
http://extension.illinois.edu/veggies/ssquash.cfm
which squash varieties will cross pollinate
An acorn squash variety will cross pollinate. Acorn is one of the variety of squash will cross pollinate.