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Analysis of Genes for Stigma Coloration in Rice - IRRI books

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sequence reacted positively to either 0.9 kb, 1.2 kb, or both. In contrast, some bands<br />

such as 9.0, 6.3, 5.6, and 22 kb <strong>in</strong> the various species showed no positive<br />

reaction to the 2 probes, This probably means that the glutel<strong>in</strong> genes embodied <strong>in</strong> these<br />

bands do not have a 5' region <strong>of</strong> glutel<strong>in</strong> gene type II.<br />

In cultivated rice (AA genome), some positive bands shifted from 6.5 to 3.4 <strong>in</strong> one<br />

case, and from 1.7 to 2.8 kb <strong>in</strong> another case. Such shift<strong>in</strong>g may <strong>in</strong>dicate that the two<br />

glutel<strong>in</strong> genes have a mutation such that an Eco RI cutt<strong>in</strong>g site had been <strong>for</strong>med<br />

somewhere between the cod<strong>in</strong>g sequence and the 5' region. These two genes may be<br />

<strong>of</strong> the same gene type II even though some <strong>of</strong> their bases had mutated.<br />

Distribution <strong>of</strong> glutel<strong>in</strong> gene <strong>in</strong> rice species<br />

To f<strong>in</strong>d any new 5' regions <strong>of</strong> the glutel<strong>in</strong> gene, PCR was applied us<strong>in</strong>g genomic DNA<br />

<strong>of</strong> the species as templates and the two 25 mer oligo ends <strong>of</strong> type II 5' regions as primers.<br />

In each species, PCR bands vary<strong>in</strong>g from 1.9 to

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