Abstract

Six commercial

varieties of sorghum (Sorghum bicolor), one of pearl millet

(Pennisetum americanum), and six millet lines from The

International Crop Research Institute for the Semiarid

Tropics (ICRISAT), Hyderabad, India, were planted on

March 23, 1998 in Santa Cruz Xoxocotlán, Oax., México, to

identify materials of sorghum and millet with higher

production efficiency and forage quality under conditions of

restricted irrigation, as a result of generalized lower water

table levels during the spring-summer period. To facilitate the

selection of varieties, productivity and modified quality

indexes were generated from dry matter production data. The

IPM was more adequate than the IP to discriminate the

varieties for their forage production efficiency and quality.

On average, the sorghum genotypes, especially Sweet Sioux

and Domor, the last one showing little variation between

harvests, were more efficient in dry matter production than

the millet ones. However, because of their high production

efficiency and quality at the first harvest, the millet cultivars

NELC C4 and ICMH 423 could be recommended for farmers

which need forage urgently and have less water availability.

Keywords: Crop phenology, heat units, selection indexes, sorghum, millet.