Gene loss in pearl millet germplasm pools.

Burton, G.W. (1976) Gene loss in pearl millet germplasm pools. Crop Science, 16 (2). pp. 251-255.

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Six different germplasm pools of pear millet, Pennisetum americanum (L.) K. Schum. (formerly P. typhoides (Burm.) Stapf and Hubb) were advanced in isolation three to five generations. A comparison of the last generation with the first showed that advancing germplasm pools of this cross-pollinated (up to 85%) species narrowed phenotypic variability, lost genes, and obscured hard to recover characters such as very long seed heads. A significant shift in maturity resulted from an attack of European corn borer. I believe, therefore, that longtime storage is the only practical way to preserve pearl millet germplasm without loss. At Tifton, pearl millet seeds dried to less than 12% moisture, enclosed in airtight containers, and stored at 5 C germinated well (70%) after 26 years. Growing germplasm pools in an environment with short days and temperatures approaching 40 C will make most genotypes flower at about the same time, facilitate intennating, and reduce gene loss. Pooling fewer lines, selecting plants to advance the population as if they were self-pollinated, and preparing pools from equal numbers of live seeds from each selected plant will also help to reduce gene loss

Item Type: Article
Uncontrolled Keywords: Pennisetum americanum (L.)K.Schum., European corn borer, National selection.
Author Affiliation: Univ. Ga. Coll. Agric. Coastal Plain Sta., Tifton, USA.
Subjects: Crop Improvement
Divisions: Millet
Depositing User: Mr Arbind Seth
Date Deposited: 20 Dec 2012 06:22
Last Modified: 20 Dec 2012 06:22
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