Viewing post #1106985 by josephAfter 13 years online, Cubits.org is scheduled to be shut down. Please make sure you have the contact information for all your friends, and that you download whatever content you want from this site.
|Watermelons end up seedless because the chromosome numbers don't match up. One parent has 2 sets DNA and the other has 4 sets, so each reproduces normally, but if a plant with 2 sets crosses with a plant with 4 sets then that leaves a plant with 3 sets of DNA which is sterile and thus seedless.
The reason to grow a striped melon as the diploid parent and a plain melon as the tetraploid parent is that the striped trait is dominant. So it is easy to go out into a field of plain melons and know that the striped melons should be seedless triploids.
The round/oblong trait ends up manifesting as a blocky melon. Again another visual clue to know which melons are seedless without cutting them open.
Commercially, the hybrids are made in a way that nearly every seed will produce a seedless melon. That's too much work for me, so I grow them side-by-side and hope for some natural hybrids.
Of course, the conversion to tetraploid could have failed, and then there won't be any seedless fruits.... I feel so risky offering this seed as soon as it's available rather than waiting a year or two. But whatever, I've fully disclosed the risks.
Author of Mother Earth News Blog about Landrace Gardening: http://www.motherearthnews.com/search.aspx?tags= Lofthouse