Origin and Development :

The parents of ICMH 451 are restorer line ICMP 451 and male-sterile line 81A (ICMA 1).

Pollinator.

ICMP 451 (illustrated overleaf) is a near-inbred line, LCSN 72-1-2-1-1, derived by selfing from the ICRISAT Center Late Composite. It was identified as one of the promising entries in the breeding nursery of ICRISAT's cooperative program at Kamboinse, Burkina Faso. It was initially variable for bristles, but head-to-row evaluation of progenies for three seasons and bulking the selfed seeds of the bristled progenies increased the bristle frequency without hanging the restorer line for other morphological characters. Male-sterile line. ICMA 1 was derived from Tift 23D2B after treating the seed with gamma-rays and selecting for downy mildew resistance. For the origin and development of ICMA 1, see Plant Material Description no. 4.