Mapping of a novel d-zein and a proposal for revising nomenclature of the d-class zeins
--Sanjay Swarup and Joachim Messing

We have cloned and sequenced dzs23, a homolog of the 10 kDa zein gene. In order to map this duplicate gene, we used the recombinant inbred lines derived from the cross T232 X CM37 kindly provided by Ben Burr (Brookhaven National Labs.). dzs23 maps to 6L-57 on the BNL map; the same as the hex2 locus. This map location has been confirmed independently by Krone and Phillips (refer to their article in this issue) using the segregants from BSSS-53 X Mo 17 cross.

Since we know of at least two members of the d-class of zeins, we would like to propose a revised nomenclature of these zeins. In doing so, we would like to include both the class designation as well as the molecular weight of the protein as estimated from SDS-PAGE analysis. We, therefore, propose to use the names dzs10 (delta zein structural 10) for the 10 kDa locus (previously also called zps10) on chromosome 9 and dzs23 for the 23 kDa locus (see accompanying note) on chromosome 6. In accordance with the standard nomenclature, their respective protein products would be DZS10 and DZS23, respectively. 

Please Note: Notes submitted to the Maize Genetics Cooperation Newsletter may be cited only with consent of the authors

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