Evaluation of herbaceous cotton lines and cultivars in the northeast of Brazil. II. Agronomic and fiber characteristics

Abstract

Eight lines of upland cotton were evaluated together with cultivars developed by the Centro Nacional de Pesquisa de Algodão (CNPA) and by other research institutions in the country. The following characteristics were observed: boll weight, lint percent and fiber length, uniformity, fineness and resistance. The data were collected in 19 regional cotton variety tests, planted in a complete randomized block design with nine treatments and eight replications, at different locations in the States of Piauí, Ceará, Rio Grande do Norte, Paraíba, Pernambuco, Alagoas and Bahia, in the years of 1980/81 and 1981/82. The genotypes IAC 17 and CNPA 78-SME₄ had the highest boll weight. For lint percent the genotypes had the highest mean values, were IAC 17 (40.1%), PR 4139 (39.1%) and CNPA 76-6555 (38.9%). Fiber length varied from 29.1 mm to 31.7 mm with CNPA 78-SME4 having the highest mean value. For the other fiber characteristics the results were: uniformity varying from 51.0 to 54.2%, fineness from 4.2 to 4.9 and resistance from 7.3 to 8.1.