| Description |
The study was conducted with the aim to know the genetic-phenotypic variability (heritability value), andcorrelation between morphology-anatomy-physiology characters and dry matter yield (DMY) of polyploidized foragegrasses under aluminum (Al) stressed condition. A total of 16 forage grass genotypes (polyploid and diploid Brachiariabrizantha, Brachiaria decumbens, Setaria sphacelata, Setaria splendida, Panicum muticum, Panicum maximum,Pennisetum purpureum, and Pennisetum purpupoides) were subjected to Al-stressed (16 mM Al2(SO4)3). The treatmentswere allotted to a Randomized Completely Block Design with monofactorial pattern (genotypes) and 5 blocks in eachtreatment. The morphology-anatomy-physiology characteristics evaluated were plant height, leaf number, tiller number,leaf color, chlorophyll content, stomata number, chloroplast number, leaf nitrate reductase activity, dry matter, wet matteryield, dry matter yield, stress tolerance index and pH media. Results showed the polyploidization increased stress toleranceindex of grasses. The genetic-phenotypic variability (heritability value) estimates for all morphology-anatomy-physiologycharacteristics were high. Most morphology-anatomy-physiology characteristics, except leaf number, chlorophyll contentand chloroplast number, had significant correlation to dry matter yield. In conclusion, evaluation on selection progress ofdry matter yield of forage grasses can be effectively done by selection for yield of wet matter, plant height, leaf color,branch number, stomata number, leaf nitrate reductase activity, pH media, and dry matter simultaneously.
|
