Variability for seedling growth characters and correlations in guayule

Abstract Twenty-four genotypes of guayule were evaluated in the greenhouse at 12 (D1) and 60 days (D2) from seeding. The analysis of variance indicated a considerable variability in principal root length at D1 and D2 and for number of roots and seedling height at D2 only. The accession numbers 4207, 4168, 4243, and 4122 recorded values that were higher than the mean for all the seedling traits. Seedling height was positively and significantly correlated with number of roots and number of leaves per seedling in D2.