Thanks alot Sharon Primerano.

It was helpful but as for as my case is concerned, I didn't get  much of it as almost all of the disorders in the manual were diseased based or stressed based which normally affect a lot of individuals but in my case all the individuals were quite healthy except the one I shared with.   

Environmental stress are one of the causes of deformation.

If an environmental cause should be found more frequently

It is a branched spike which is genetically controlled but some time it express even otherwise but not to this extent  when weather is highly  favourable for growth  during spikelet formation.

could be a spontaneous somatic mutation in the ear primordia which has made the ear develop in an irregular way. You could collect the seed from it and see how they develop. I expect them to mostly develop normally . However  the mutation may have become fixed in a few of the next generation.   best wishes

This is bad photo. What is wheat? Tetraploid or Hexaploid?  Is this the main ear?

1) Tetraploid wheat Triticum turdidum has such phenotype.

2) Very rarely branch spike may occur in very late heading plantы. In the next generation it will not. The mutant should have changed the main spike .

actually environmental condition and some herbicides cause disorder and malformation in wheat plants. herbicides like 2-4 D has an effects hormone

Thanks alot for your valuable comments. 

2,4 D Injury or a spontaneous somatic mutation.

if this was the only plant in the field - it is unlikely to be herbicide damage . other possibility is damage by a small boring insect/nematode to the ear at very early development. 

this deformation or abnormal shaping of spikes in wheat could be attributed mainly to genetic factors associated with development of the spike or to some extent due to changes in temperature  prevailing during spike growth and differentiation 

Gene mutation seems to be the more convincing factor for abnormal development of the ear. If this is the only such ear in the whole field, environmental factors may be ruled out.

May be due to variation in temperature during reproductive growth of wheat i.e. influence of environmental factor. 

Usually drift or herbicide effect. Probably 2,4D.

I found this spike two years ago within my experiments. I planted its seeds last year, but all spikes were normal. It was only an environmental effect.

the picture, that i sent, was in triticale

Last year we identified two spikes with forked heads in spring hexaploid wheat. We found these in several segregation populations, no herbicide/pesticide was applied. These deformations might arise due to high temperature during inflorescence development process. As heat stress can induce DNA damage, so possibility of mutations in floral development gene(s) cannot be ruled out. 

I noticed this occurrence in rye as well. There are many possibilities for this abnormality, hebicide, high temperature or frost during the development of the spike, etc. I discard mutations because the seeds originating from these spikes gave rise to normal plants.

I think deformation in wheat ear head is due to caused in execs use of Nitrogen fertilizer. Grower applied execs N fertilizer.