生产上栽培的无籽西瓜均是三倍体西瓜,该瓜是以四倍体西瓜为母本,普通二倍体西瓜为父本,杂交配制成三倍体种子,经播种而获得的果实。由于三倍体植株染色体组是畸形的,不能形成正常配子,具有高度的不孕性,子房在父本花粉刺激下发育成正常的果实,而胚珠却不能发育成成熟的种子,从而形成无籽西瓜。本地区无籽西瓜品种以大果型晚熟新一号类型为主,一般生育期100d左右,晚瓜生育期可达120d。一般本地区4月10 Seedless watermelon cultivated on the production are triploid watermelon, the melon is a tetraploid watermelon as the female parent, common diploid watermelon as the male parent, hybridized to form a triploid seed, obtained by sowing the fruit. Because the triploid plant genome is abnormal, unable to form normal gametes and highly infertile, the ovary develops into a normal fruit under the stimulation of the male pollen, whereas the ovule fails to develop into a mature seed and thus forms no Watermelon seeds. Seedless watermelon varieties in this region to large late-maturing new type of the main type, the general growth period of about 100d, late melon growth period of up to 120d. General This region April 10