how do they make seedless fruits????

Question

iv allways wanted to know how they do it

Answer 1

Plants have the ability to cross fertilize and produce sterile offspring just as mammals do. Think mules. Since fruit is the product of the flowers reproductive center it grows around the seed after pollination. However if no mature seed develops from the fertilized egg it is considered seedless. Many times immature seeds are present but easily ignored like the black specks in bananas or the soft, shriveled, white things in watermelon. To grow more plants you have to use the same parents or vegetatively clone the seedless cultivar.
Seedless crosses occur naturally but would dead end for lack of the next generation except humans have been used by the plants to provide support in creating subsequent generations. This is a nice case of symbiosis. We get to eat seedless fruit but the plant continues and spreads.
Seedless watermelons have been with us since 1939. They occur because of something only plants can do. Plants can go from diploid to tetraploid. Two set of genes to four sets. This has occurred spontaneously throughout history but can be induced in the lab now. If you cross a diploid with a tetraploid you get a mule in the same way a jack donkey covering a mare produces a mule. The chromosomal pairs cannot align properly during meiosis but the normal sequence is unimpaired for mitosis so the mule or the triploid plant can grow normally it just cannot produce the next generation. Since the triploid plants can’t produce the gametes for the next generation themselves they are pollinated by diploid father plants. The act of pollination triggers the fruit to grow without a fertile egg present.
In 1876 the Scottish immigrant William Thompson developed the seedless grape we still call the Thompson grape. It had come to be by some natural process, it was a mutant diploid seedless grape growing wild. It was discovered and propagated by humans by grafting cuts onto other rootstocks. Thompson continued grafting until he developed the line that we still use. The same is true of seedless oranges. They are also all graft descendants from one wild, seedless plant.
So all seedless plants are dependant on humans for propagation by alternated means.

Answer 2

Seedless Fruit

Answer 3

Many kinds of plants are grown not from seeds but from pieces cut from existing plants. Farmers cut branches or buds, young growths, from one plant and place them on a related kind of plant.

The branch or bud that is grafted is called a scion [pronounced SY-uhn]. The plant that accepts the graft is called the root stock.

Over time, the parts from the two plants grow together. The grafted plant begins to produce the leaves and fruit of the scion, not the root stock.

A graft can be cut in several ways. A cleft graft, for example, requires a scion with several buds on it. The bottom of the scion is cut in the shape of the letter V. A place is cut in the root stock to accept the scion.

The scion is then securely placed into the cut on the root stock. Material called a growth medium is put on the joint to keep it wet and help the growth.

Grafting can join scions with desirable qualities to root stock that is strong and resists disease and insects. Smaller trees can be grafted with older scions.

The United States Environmental Protection Agency says producing stronger plants by grafting can reduce the need to use pesticides.

Agriculture could not exist as we know it without grafting. Many fruits and nuts have been improved through this method. Some common fruit trees such as sweet cherries and McIntosh apples have to be grafted.

Bing cherries, for example, are one of the most popular kinds of cherries. But a Bing cherry tree is not grown from seed. Branches that produce Bing cherries must be grafted onto root stock. All sweet cherries on the market are grown this way.

And then there are seedless fruits like navel oranges and seedless watermelons. Have you ever wondered how farmers grow them? Through grafting.

The grapefruit tree is another plant that depends on grafting to reproduce. Grapes, apples, pears and also flowers can be improved through grafting.

In an age of high-technology agriculture, grafting still holds an important place.

You can check this links also:
http://www.madehow.com/Volume-6/Seedless-Fruits-and-Vegetables.html
http://en.wikipedia.org/wiki/Seedless_fruit

Answer 4

The fruits aren't totally seedless, they just have less seeds. They basically "mate" varieties that produce a hybrid that has few to no seeds. Basically they take the pollen from one plant and put it on the pollen from another variety. So one plant acts as the male and the other as the female. They take the seeds from the fruit of the female plant and use that to create a new variety that is almost seedless.

Answer 5

Grafting

Answer 6

They both are Ideal for your health. If you eat both, you're better off. But yea, I've choose fruits because they taste better.

Answer 7

It is determined by the fruit or plant linked to a comparison. In the event you compare a farreneheit to a carrot, the carrot is the better of the two nutritional. When you compare an avocado to the carrot, then an avocado is better. The two the apple and avocado, are fruits.