نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار بخش کشاورزی (اصلاحنباتات و ژنتیک)، دانشگاه پیامنور، تهران- ایران.
2 دانشیار اصلاحنباتات، گروه زراعت و اصلاحنباتات دانشگاه رازی.
3 استادیار اصلاحنباتات، گروه زراعت و اصلاحنباتات دانشگاه بوعلیسینا.
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Assessing specific relationships among lint-yield, cottonseed-yield and some important agro- morphological traits, in commercial varieties of Varamin, was the main objective of the present study to use in the future breeding programs. To achieve the above objective, the seeds were planted in 10 lines with 2 meters long in each block, based on RCBD with three replication on 2009-2010. Plant height, number of bolls per plant, boll weight per plant, leaf length, leaf width, number of branches per plant, length of fiber, chlorophyll content, fiber yield, kail, lint-yield and cottonseed-yield were measured. Correlation analysis indicated that the traits of boll weight, (r= 0.97), cottonseed-yield (r=0.93), fiber weight (r=0.90), leaf width (r=0.77), fiber length (r=0.70), leaf length (r=0.66) were significantly correlate with lint-yield. Stepwise regression results for lint-yield, as dependent variable, showed that the traits of boll weight, fiber weight, kail and number of bolls per plant were respectively entered in the regression model, as the most effective independent variables. Path analysis results indicated that the trait of boll weight had the maximum direct effect (0.366) and the traits of boll weight and kail had the maximum indirect effects (by increasing fiber weight character) on lint yield. Total results showed that the trait of boll weight will has the maximum direct and indirect effect on increasing lint- yield therefore, we can use of that in future breeding program for improvement of lint-yield. Lint-yield and kail were the most important characters on increasing fiber weight. In other words, these two above-mentioned traits had the maximum direct and indirect effect on fiber weight respectively. Finally, the traits of boll weight and lint-yield were recognized the most important characters for improving cottonseed-yield of Varamin cultivar.
کلیدواژهها [English]
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