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The two-line hybrid system in rice is becoming more important and employs environment-conditioned genic male sterile (EGMS) lines sensitive to photoperiod (photoperiod-sensitive genic male sterile), temperature [temperature genic male sterile (TGMS)], or a combination of the two (photoperiod temperature genic male sterile). At least 18 EGMS genes have been mapped, and two cloned, but controversies...
Genic male sterility conditioned by either photoperiod (PGMS) or temperature (TGMS) is the key trait that has enabled the establishment of the two-line hybrid rice (Oryza sativa L.) system. The PGMS trait is known to result from a C→G mutation in a long noncoding RNA gene (lncR) and the TGMS from a premature stop codon mutation (TC/GC→TA) in an RNase Z gene (RNZ). To develop an efficient genotyping...
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