Variabilidad y correlaciones de caracteres vinculados con el vigor de plántula en dos poblaciones naturales de Pappophorum vaginatum Buckley

ENTIO J; MUJICA M.M.; BUSSO C.A.; TORRES Y.A.; MONTENEGRO O.A.; ITHURRART L; GIORGETTI H.D; RODRIGUEZ G.; BENTIVEGNA D. J.; BREVEDAN; FERNÁNDEZ O.A.; BAIONI S; FIORETTI M.N.; TUCAT G.

REVISTA DE LA FACULTAD DE CIENCIAS AGRARIAS DE LA UNIVERSIDAD NACIONAL DE CUYO

UNIV NACIONAL CUYO

Lugar: Mendoza; Año: 2014 vol. 46 p. 223 - 230

0370-4661

It was evaluated variability and phenotypic correlation in traits related to seedling vigor in two natural populations of P.vaginatum. They were weighted and sowed individually 100 caryopses of each population ("A"; "B"). After 43 days it was determined: lengths aerial (LA), root (LR), total (LT) and longest adventitious root (Ladv), number of adventitious root (n°adv), of leaves (n°hoj), of senescent leaves (n°sen) and of tillers (n°mac) and dry weight aerial (PSA) and root (PSR). It was calculated total dry weight (PST), PSA/PSR and LA/LR. Variability was analyzed by means of descriptive statistic and t test. It was analyzed correlation among traits and multiple regression of traits on PST. Populations did not differ in PST (p higher than 0.05). "A" had greater (p lower than 0.01) PSA/PSR, LA/LR and LA. "B" had higher (p mayor 0.05) LR, Ladv and PSR. Both populations showed significant and positive correlation of PST with LA, LT, Ladv, n°adv, n°hoj y n°mac. The regression was significant (p lower than 0.01). The variability found within and between populations implies expectations of response to selection. PST varied only within populations suggesting the convenience of intrapopulation selection. The association found between the traits LA and n°mac and the seedling vigor, should be considered for the genetic improvement of the implantation.