Maize Genetics Cooperation Newsletter vol 84 2010

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

URBANA, ILLINOIS

Maize Genetics Cooperation � Stock Center

New alleles of chlorophyll1 found in lemon white endosperm stocks in Maize COOP phenotype‑only collection

‑‑Janet Day Jackson

This report summarizes allele testing of lemon white endosperm stocks characterized only by phenotype in the Maize Genetics COOP Stock Center collection. Here pale kernels linked to pale green or albino seedlings characterized all stocks. Many had previously given negative results in tests with vp9, w3 and y9. The cl1 Clm1‑3 stock used in crosses here carries a dominant modifier of cl1 that allows for viable green plants making crosses with a homozygous stock possible. Crosses were made as follows: [+/lw*]@ X cl1 Clm1‑3 or +//+/lw* X cl1 Clm1‑3. Ears were scored for the segregation of pale yellow kernels.

New designations have been assigned to these alleles and they have been placed in the main collection. Stocks with this same phenotype that were found to complement cl1will be tested for allelism with other stocks linked to pale endosperm.

Previous designation	allelism test with w3	New designation	MGCS stock number
5910E lw*‑1981‑10	4 positive	cl1‑1981‑10	306L
5912B lw*‑B73	4 positive	cl1‑B73	306M
5912F y‑pg*‑1981‑17	3 positive	cl1‑1981‑17	306N