02008naa a2200253 a 450000100080000000500110000800800410001902400300006010000240009024500940011426000090020852012730021765000130149065300230150365300110152665300130153770000250155070000180157570000200159370000180161370000160163170000260164777300810167320576662016-12-01       2016    bl uuuu     u00u1 u    #d7 a10.4238/gmr.150275192DOI1 aSANTOS, O. J. A. P.  aScreening of inbred popcorn lines for tolerance to low phosphorus.h[electronic resource]  c2016  aIncreasing phosphorus use efficiency in agriculture is essential for sustainable food production. Thus, the aims of this study were: i) to identify phosphorus use efficiency (PUE) in popcorn lines during the early plant stages, ii) to study the relationship between traits correlated with PUE, and iii) to analyze genetic diversity among lines. To accomplish this, 35 popcorn lines from Universidade Estadual de Maringá breeding program were studied. The experiment was conducted in a growth chamber using a nutrient solution containing two concentrations of phosphorus (P): 2.5 ?M or low P (LP) and 250 ?M or high P (HP). After 13 days in the nutrient solution, root morphology traits, shoot and root dry weight, and P content of the maize seedlings were measured. A deviance analysis showed there was a high level of genetic variability. An unweighted pair group method with arithmetic mean (UPGMA) clustering analysis identified three groups for the LP treatment (efficient, intermediate, and inefficient) and three groups for the HP treatment (responsive, moderately responsive, and unresponsive). The results of a principal component analysis and selection index were consistent with the UPGMA analysis, and lines 1, 2, 13, 17, 26, and 31 were classified as PUE.  aFósforo  aEstresse abiótico  aPipoca  aWinRHIZO1 aGONÇALVES, L. S. A.1 aSCAPIM, C. A.1 aSOUSA, S. M. de1 aCASTRO, C. R.1 aBABA, V. Y.1 aOLIVEIRA, A. L. M. de  tGenetics and Molecular Research, Ribeirão Pretogv. 15, n. 2, p. 1-9, 2016.