Characterization and Selection of ElephantGrass Clones (Pennisetum purpureum Schum.) at the Pernambuco Forest Zone

[摘要] - This work aimed to characterize an elephantgrass collection (Pennisetum purpureum Schum.) comprising 71 clones and selecting the best ones to be tested later under grazing conditions. It was carried out at Cedro Experimental Station - IPA, located in Vitória de Santo Antão, forest zone of Pernambuco State. The period of evaluation included both the raining and the dry season. Each clone was represented by a non-replicated plot of 10 m2. According to linear correlation analysis, the more productive clones also showed highest plant height and highest growing point height, greatest stem diameter, highest stem/leaf ratio, highest basal and total tiller numbers and greatest leaf lenght. The same characteristics above were also positively correlated with the leaf blade yield, except stem/leaf ratio. There was a high correlation coefficient (r = 0.9517) between dry matter yield and leaf blade yield. The selection of clones to be tested under grazing conditions was based on the materials that showed the highest leaf blade yield. These materials were: Mineirão/IPEACO, Hexaplóide, Mole de Volta Grande, King Grass, 591-76 or Cameroon, CE 5 AD, Gigante de Pinda, CE 4 AD, Elefante da Colômbia and Vrukwona.

[学科分类] 兽医学

[关键词] evaluation;forage plant;plant breeding;productivity     IntroduçãoO Nordeste brasileiro apresenta atualmente 14% do rebanho bovino do país;o que representa cerca de 22 milhões de cabeças (Anuário da Pecuária Brasileira;1998)