sentences:  Norin 10 wheat, a variety developed by Orville Vogel from Japanese dwarf wheat varieties, was instrumental in developing Green Revolution wheat cultivars.IR8, the first widely implemented HYV rice to be developed by IRRI, was created through a cross between an Indonesian variety named “Peta” and a Chinese variety named “Dee Geo Woo Gen.”
  
  With the availability of molecular genetics in Arabidopsis and rice the mutant genes responsible ("reduced height(rht)", "gibberellin insensitive (gai1)" and "slender rice (slr1)") have been cloned and identified as cellular signalling components of gibberellic acid, a phytohormone involved in regulating stem growth via its effect on cell division.Stem growth in the mutant background is significantly reduced leading to the dwarf phenotype.