Variety traits

Sorghum tolerance

Sorghum bicolor (L.) Moench

Sorghum tolerance is defined as the crop's ability to maintain viability and productivity under saline and drought conditions. The trait is assessed via laboratory germination rates under stress or yield stability indices in contrasting agroclimatic conditions.

In the reference 28 varieties crop Sorghum, where this is mentioned in the description.

When assessing salt tolerance, laboratory seed germination methods in sodium chloride solutions are applied, as well as field measurements of soil extract electrical conductivity. Genotypes that maintain germination in the range of 61–100% of the control are considered highly resistant. The stress susceptibility index (SSI) is used for analysis, where lower values correspond to higher tolerance.

Drought tolerance is assessed using DSI indices, which compare yields under stress and optimal conditions, and homeostasis parameters. Sorghum's response to moisture deficit is subdivided into two types: occurring before flowering, which affects panicle parameters, and after flowering, causing premature senescence and lodging.

Grain sorghum often shows higher resistance to osmotic stress than sweet sorghum or sudangrass. A comprehensive assessment of a variety's adaptability requires accounting for genetic flexibility, determined by the results of multi-year trials in conditions varying in moisture and salt regimes.

General information about the subject — on the page Tolerance.

Sources8

Varieties of Sorghum mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.