Wheat Diseases and Pests - Wheat Doctor - CIMMYT

Hybrid Necrosis
(Dwarf Clumping)
Some forms of spotting and necrosis result from
chromosomal instability or genetic aberrations;
these disorders are known as hybrid necrosis.
Affected plants show diffeiing degrees of necrosis
(931, often associated with stunting or dwarf
clumping. Hybrid necrosis usually is observed in
early generation material (941, and affected
progeny are eliminated.