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On-line version ISSN 1678-4596
BEVILAQUA, Gilberto Peripolli; LINHARES, Aroldo Gallon and SOUSA, Cantídio Nicolau Alves de. Characterization of wheat genotypes from the crossing block of the national wheat research center, RS, Brazil. Cienc. Rural [online]. 2003, vol.33, n.5, pp. 789-798. ISSN 1678-4596. http://dx.doi.org/10.1590/S0103-84782003000500001.
Wheat genotypes from the crossing block were caracterized at the National Wheat Research Center (Embrapa Trigo) in 1999. Plant traits evaluated were height, cycle up to heading, peduncle length, and number of grains per spike. One hundred and twenty-two genotypes were evaluated at two seeding dates that consisted blocks. For each tretament, ten peduncles from the main tiller were measured and the total number of grain in each spike was counted. The mean values obtained in such evaluations were take into consideration for presenting the results. For statistical analysis, the experiment was considered complete block design. Based upon results the genotypes BR 18, BR 42 and Sonora 64 were outstanding for their low stature and early cycle. Florida 301 and "Trigo de chapéu" were outstanding for their high stature and long cycle up to heading. The plant height showed a high correlation with peduncle lenght and cycle up to heading, and the latter correlated with peduncle lenght. The genotypes CNT 10 and PF 92130 can be indicated for handicraft finalities due to the long peduncle and spike grain number above average. The study showed a considerable genotipic variability among wheat genotypes as to the traits assessed and provided information on wheat genotypes that may be used for breeding and commercial production.
Keywords : Triticum aestivum; cycle; height; spike fertility.