Can tetraploid wheat and octaploid wheat produce fertile offspring

According to the definition of species, even if two species cross to produce offspring, the offspring is sterile.

Naturally, tetraploid wheat exists, octaploid wheat is artificially bred, and common wheat is hexaploid.

Imagine that scientists use a tetraploid wheat (AAAA) to cross with a diploid (BB) similar species to obtain AAB triploid, and then double colchicine to obtain AAAABB, which is also cocoa fertile; If AAAABB is hybridized with another CC to obtain AABC, the octaploid of AAAABBCC is doubled. If this octaploid is crossed with tetraploid (AAAA) to obtain AAAABC, can such heterohexaploid still be fertile?

To improve crop varieties, it is sometimes necessary to use hybridization between similar species, and then use the colchicine doubling method to obtain heteropolyploidy, so that the offspring can be fertile.

To put it simply, we should not only look at the number of chromosomes, but also look at the problem of homology and heterologous.

Are they hybridized or self-bred...

According to the understanding of high school, if the two can be crossed to produce offspring, and the hybrid offspring can be fertile, there is no reproductive isolation between the two and they belong to the same species. Thus, tetraploid is the same species as octaploid because their hybrid offspring are hexaploid and fertile; Diploid and hexaploid are also the same species, and their hybrid offspring are tetraploid and can also be fertile; But diploid and tetraploid are not the same species, because their hybrid offspring are triploid and sterile, and tetraploid and hexaploid are not the same species.

No. The argument for high school biology books is problematic. The chromosomal folds of the same species should be the same.

It must be the same species, but it's just mutated. For example, if you treat 4ploid with colchicine, it is possible to mutate to 8ploid.

No, they are disordered and cannot produce fertile offspring.

It's not the same species,,, just memorize it,,, I asked the teacher and he didn't explain it to me.

The criterion for judging whether it is a species or not is whether there is reproductive isolation, and the cross between tetraploid wheat and octaploid wheat gives a hexaploid, which is theoretically fertile, but because both octaploid and tetraploid are heterologous, some chromosomes in the hexaploid obtained by hybridization have no homologous chromosomes, so they are sterile, so they are not a species.

The answer from the one upstairs is too cumbersome, according to the knowledge in high school: even multiples of homologous chromosomes can be producing, while odd multiples cannot, because there will be association disorders and no offspring can be produced.

In the natural state, mating can breed freely, and can produce fertile offspring, which is the same species. 4 and 8 times more capable of mating freely?

Tetraploid and octaploid don't seem to be the result of reproductive isolation...

It is difficult to occur under natural conditions, but it can be achieved by cell fusion technology, cell culture technology.

Fertile. Because polyploid plants induced by colchicine are often homotetraploid, if they are crossed with diploid controls, triploid plants can be obtained, such as artificially obtained triploid watermelons, bananas, etc. Seedlessness or few seeds are their distinguishing characteristics.

In addition, in the process of ploidy breeding, if one of them is doubled and the distant cross is not incompatible in some combinations of distant hybridization, it is often easy to carry out the distal hybridization, and the obtained heteropolyploid often has outstanding performance in terms of growth and stress resistance.

If it is a homologous plant, i.e., the hexaploid is doubled by diploids, it is fertile. If it is heterologous, the chromosomes in the hybrid offspring are composed of one chromosome set in the diploid and three chromosome groups in the hexaploid, which are different from each other and cannot be joined normally, so they are infertile.

Of course, it can be fertile, according to the high school teacher, even numbers can be fertile. Thank you for adopting.

It is fertile because its chromosomes are even-numbered pairs.

Octaploid wheat is cross-bred. Microbial technology mainly refers to microbial culture technology, which rapidly reproduces single-celled individuals in large numbers.

If you want to obtain a large number of octaploid wheat individuals, plant tissue culture techniques are used.

Theoretically, yes, but earning genes is not necessarily good for the human body.

Who says it won't be disordered? Could it be that the two associations of the more of oneself will not be successful? It's not the same species anymore.

Make. The formation of 6ploid fertile offspring, which belongs to the heterologous 6 quilt.

They can be crossed into hexaploid small rye

The statement that tetraploid and octaploid are not the same species is wrong. The two can be crossed, and the offspring can be fertile, proving that there is no reproductive isolation and that they are the same species.

Please, what is reproductive isolation, is between different species, these two are still wheat.

You're wrong about that, right?

Tetraploid wheat produces gametes that do not have homologous chromosomes in them, and the offspring that it crosses with octaploid wheat are not fertile, even though they are not as fertile as normal species.