Selecting salt-tolerant clones and evaluating genetic variability to obtain parents of new diploid and tetraploid germplasm in rhodesgrass (Chloris gayana K.).

A RIBOTTA; GRIFFA, S.; D. DÍAZ; E. CARLONI,; E. LÓPEZ COLOMBA; E. TOMASSINO; M. QUIROGA, ; C LUNA; K. GRUNBERG

SOUTH AFRICAN JOURNAL OF BOTANY

ELSEVIER SCIENCE BV

Año: 2013 vol. 84 p. 88 - 93

0254-6299

We evaluated survival percentage under salt stress in 46 diploid and tetraploid clones of rhodesgrass (Chlorisgayana K.) with the aim of obtaining salt tolerant clones. Fifteen clones were selected at 600 mM NaCl underhydroponic conditions. Survival percentage of the selected clones ranged between 50?100% and 50?75% fordiploid and tetraploid clones, respectively. Genetic diversity among the 15 salt-tolerant clones was assessedusing amplified fragment length polymorphism (AFLP). All tetraploid clones showed genetic diversity,whereas the diploid group included some genetically related clones. Clones tolerant at 600 mM NaCl andshowed genetic diversity are proposed as parents for new synthetic varieties of each rhodesgrass ploidy.