maize mutant phenotypes

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            Ds-Cbreaker A2; (A2 Ds-5S1 Bt1 Pr1)
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        frequent colorless shrunken and red sectors on the purple kernels from the cross of mutant heteroszygote on an a2 bt1 pr1 tester stock.
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        <a href="http://images.maizegdb.org/db_images/Variation/mgn/5133_2021_1928_49.jpg">
            <img src="http://images.maizegdb.org/db_images/Variation/mgn/480_w_ds/5133_2021_1928_49.jpg"/>
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                Ds-Cbreaker A2; (A2 Ds-5S1 Bt1 Pr1)
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            Selfed ear of an Ac/-, A2 Ds-5S1 Bt1 Pr1/a2 bt1 pr1 Pr1/a2 bt1 pr1, Ds-10L2 R1-sc/Ds-10L2 R1-sc plant, with 3:1 segregation for a2/bt1/pr1 showing appropriate linkage and crossover classes and segregating for Ac. The several colored and colorless mosaic nonbrittle kernels with large colorless sectors are the Ac/-/- A2 Ds-5S1 Bt/a2 bt/a2 bt endosperm class. The nearly complete absence of concurrent colorless brittle (A2 Bt1 losses) proves that these two genes are on opposite sides of the centromere.
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        <a href="http://images.maizegdb.org/db_images/Variation/mgn/5133_2021_1928_51.jpg">
            <img src="http://images.maizegdb.org/db_images/Variation/mgn/480_w_ds/5133_2021_1928_51.jpg"/>
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                Ds-Cbreaker A2; (A2 Ds-5S1 Bt1 Pr1)
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            Ear from the cross of a2 bt1 pr1/a2 bt1 pr1 x Ac/-, A2 Ds-5S1 Bt1 pr1/a2 bt1 pr1 with a 1:1 segregation for Ac and the chromosome-breaking with linked markers A2 and Bt1. The colored and colorless non-brittle mosaic kernels (A2 Ds-5S1/a2 bt/a2 bt) have large colorless sectors on more than one-half of the kernel surfaces. These have small islands of intensely colored tissue (recovery spots).
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    <div class="figure">
        <a href="http://images.maizegdb.org/db_images/Variation/mgn/5133_2021_1928_48.jpg">
            <img src="http://images.maizegdb.org/db_images/Variation/mgn/480_w_ds/5133_2021_1928_48.jpg"/>
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                Ds-Cbreaker A2; (A2 Ds-5S1 Bt1 Pr1)
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            Ears placed together for comparison, showing typical expression of chromosome breakage of a proximal located Ds in the various combinations of Ac Ds and A2 in the 3N aleurone and endosperm.
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