A Growth Curve Application to Compare Weights of Five Wheat Varieties

Authors : Ufuk KARADAVUT, Seyit Ali KAYIŞ

Pages : 107-110

View : 105 | Download : 13

Publication Date : 2006-12-25

Article Type : Research Paper

Abstract :In this study, growth curves of 5 wheat varieties insert ignore into journalissuearticles values(namely Dağdaş 94, Kınacı 97, Konya 2002, Karahan 99, and Ahmetağa); were modeled via fitting Gompertz and logistic growth curves insert ignore into journalissuearticles values(whose parameters can be interpreted biologically); to plant weight data, which are collected for 20 weeks. In addition, growth curves of wheat varieties and their parameters were com-pared by using sum of square reduction test. Results show that Karahan 99 is the variety that has the highest growth potential insert ignore into journalissuearticles values(178.4 gr);, while Ahmetağa is the variety that has the lowest growth potential insert ignore into journalissuearticles values(147.5 gr);. On the other hand, the variety Ahmetağa reaches to the maximum absolute growth rate at the earliest insert ignore into journalissuearticles values(13.54 weeks);, while the variety Karahan 99 reaches the latest insert ignore into journalissuearticles values(14.9 weeks);. Results from sum of square reduction test show that a common Gompertz growth curve function can not be used for all va-rieties. However, it is found that varieties Dağdaş 94, Kınacı 97, and Ahmetağa can be expressed with a common growth curve while Konya 2002 and Karahan 99 can be expressed with another common growth curve.
Keywords : Gompertz büyüme eğrisi, lojistik büyüme eğrisi, büyüme eğrilerinin karşılaştırılması, indirgenmiş kareler toplamı testi

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