For example, although tangerines like the satsuma are able to self-pollinate, minneola tangelos are produced only through cross-pollination. Pollination of Citrus Hybrids 2 Table 1. Pollination can be modified through selective breeding. feldon30 Houston, TX(Zone 9a) Jun 15, 2009. The weather during the pollination period in the spring is also a factor in that bees are less effective pollinators during cold, wet and windy weather. Browse and purchase gardening books by Walter Reeves, plus select titles by other authors. This either involves an insect or the wind carrying the pollen from flower to flower, taking the needed genetic material with it. He has received recognition as a Shining Star Talent Scholar in English while studying English at the University of Oregon. 3. For many citrus plants, including tangelos and some mandarins, cross-pollination is used effectively along with vegetative reproduction to increase a species' rate of survival. Cross pollination only affects the embryo (or embryos in polymbryonics) in the seeds, which will determine the next generation. 2. Some citrus fruit, such as clementines, specifically require cross-pollination with differing species to reproduce. These navels rarely produce seeds because they are male sterile (i.e. Those fruits listed as self-fertile will set fruit with their own pollen. In the normal flowering process, pollen is deposited from the stamens onto the stigma of an open flower. 2 types of Navel oranges, one Mandrian tangerine, and probably a lemon Pollination of Citrus Hybrids 1. Some citrus varieties, such as many of the clementines and mandarin hybrids, are not parthenocarpic and require cross pollination by another variety to produce fruit, or will produce seeds if cross pollinated by another variety with fertile pollen. It is possible for certain citrus trees to experience over-pollination if too many cross-pollinating trees are placed within the same area. Most commonly, plants use vegetative reproduction or self-pollination, which includes transferring the genetic material of two flowers on the same tree. According to the University of Florida department of agriculture, both trees should be placed no more then the distance of two fully developed trees in between them. Plants are unable to pollinate with species of unrelated plants, making many hybrids of plants impossible to produce, such as naturally creating a plum-orange hybrid. This either involves an insect or the wind carrying the pollen from flower to flower, taking the needed genetic material with it. Granny Smith is a good universal pollinator as it has a long flowering period that can overlap with others. Please email if you can find it.). The degree of seediness of the fruit of a given mandarin tree often becomes a function of how many other varieties of pollen-bearing varieties of citrus are within a bee’s flying distance from that tree. Apple: Cross pollination always needed to produce adequate fruit crop. So today we’ll discuss both the terms pollination and cross-pollination. . Any species not listed here has the Slowest Pollination trait. For many citrus plants, including tangelos and some mandarins, cross-pollination is used effectively along with vegetative reproduction to increase a species' rate of survival. Jonathan Budzinski started his writing career in 2007. Many of the commercial species in the citrus genus, are self-fertile, meaning that the pollination of a pistil (female flower part) may occur by pollen from stamens (male flower part) on the same plant. Trees begin to develop more fruit than the tree has enough resources for, lowering the quality of both the fruit and the tree itself. - Pollen is primarily transfered by honeybees so plant trees 100 feet or less apart. Cross-pollinators need differing genetic material from specific species to reproduce. Most varieties of navel oranges, such as Parent Washington, Frost Nucellar, Atwood, Fisher, Bonanza or Lane Late, produce mostly parthenocarpic fruit.