Abstract
Evaluation of genetic diversity within germplasm collections is important to plant breeders who desire sources of genes for particular traits. The S1 bulks of 103 landraces of pearl millet [Pennisetum glaucum (L) R. Br.] collected in central Burkina Faso, West Africa were evaluated for morphologic characteristics in an attempt to differentiate among the landraces. Seed shape, seed color, and 100 seed weight were evaluated. Maturity and height of field‐grown plants were assessed in 1987 and 1988, and panicle length and diameter were measured in 1988. Frequencies of chlorophyll‐deficient seedlings were determined. These descriptors, in addition to previously reported data of their resistance to Pyricularia grisea (Cke.) Sacc., Puccinia substriata Ell. & Barth vat. indica Rach. & Cumin., and Moesziomyces penicillariae (Bref.) Vanky, and seed set after inoculation with M. penicillariae were analyzed by Ward's cluster analysis. The landraces could be grouped into ten dusters of phenotypic diversity. There was some correspondence between the geographic collection sites of landraces and their inclusion in particular clusters. Analysis of morphologic and disease resistance descriptors was useful for identifying likely duplicates within the collection, and will facilitate identification of potentially different sources of desired traits.
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