Physiological and morphological traits associated with grain yield improvement in post green revolution period in wheat and the future prospects

Subject Areas : Journal of Plant Ecophysiology

Hamidreza Miri ¹ (گروه زراعت، دانشکده کشاورزی، واحد ارسنجان، دانشگاه آزاد اسلامی، ارسنجان)
Farahnaz Momtazi ² (دبیر آموزش و پرورش ناحیه دو شیراز، شیراز، ایران)

Received: 2020-03-30 Accepted : 2020-03-30 Published : 2020-03-20

Keywords: biomass, Wheat, harvest index, Physiological traits, yield potential, yield improvement,

Abstract :

Wheat grain yield had increased considerably during past year. The reports showed that this increase was about 1% per year in most of the cases. For example, the results of experiments conducted in Mexico, England, France, Argentina, China and Iran showed such trends. There is considerable interest for scientist to understanding the role of traits that involved in yield increasing, since grain improvement in wheat is an important problem. Increasing harvest index, reduced plant height, increasing grain number per ear, increasing ear number and to some extent increasing biomass, specially in the recent year that harvest index reached to maximum predict value, had the highest role in wheat yield improvement in past year. It seems that some traits had little changes during yield improvement in breeding programs and more efforts must be done to improving these traits. Some of these traits that in future breeding programs must be considered are, improving biomass production, improving rooting traits, increasing stem elongation period, improving RUE, improving efficiency of use of stem reserves to grain filling and improving ear morphology. 

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