مقایسه توان رشد اولیه در ارقام دیپلوئید و تتراپلوئید پنبه و همبستگی آن با عملکرد کل وش

In order to comparing the early vigor in cotton dipolid and tetrapolid cultivars, a survey was conducted in Hashem Abad cotton research station (Gorgan district). This survey was carried out in randomized complete block design with 16 treatments and 4 replications. Treatments was included 12 tetrapolid (Sahel, Siokra, NO-200, 43259, B557, 312-818, 43347, Tabladilla, Nazili, Chekorawa, Opel, Avangurd,) and 4 dipolid (Hashem Abad landrace, Kashmar landrace, Sabzevar landrace and Aria landrace). Evaluation of early vigor was considered as seedling dry matter accumulation 39 after planting date. Analysis of variance was shown that plant height, node no per plant, sympodial branch per plant, total branch number, monopodial branch number, boll number per plant, 20 boll weight, total yield, first picking yield, earliness percent and seedling dry matter was affected by cultivars treatment. The highest and lowest amounts of seedling dry matter was belonged to Opel and B-557 cultivars, respectively but there was no significant difference between them as total lint yield. Coefficient of correlation among traits was indicated that increasing early vigor (seedling dry matter) was cased stimulatingly boll weight (R2=0/75*) enhancing in tetrapolid cotton cultivars but first picking lint yield (R2=0/95**) and total lint yield (R2=0/98**) was increased in diploid (landrace cultivars). Therefore, results of this experiment were shown that more seedling dry matter was incased boll weight in tetrapolid cultivars and picking lint yield and total lint yield in diploid cotton cultivars.