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My scientist cuts the round-grained nonglutinous rice that solve Xian strong rat
From;    Author:Stand originally
Wuhan on August 14 report (reporter Yu Jian) how to overcome long-grained nonglutinous rice and fertility of hybrid of round-grained nonglutinous rice to drop, strong rate is very low problem, it is paddy breeding home people will a few years search hard. Academician of the Chinese Academy of Sciences, China the research group that Zhang Qifa of professor of college of middle peasant course of study presents as leading role obtains significant progress in this one domain recently, discover and successful detached clone controls crossbred fertility of paddy Xian Jing and wide endophilicity of shape advocate effect gene, name for S5. Great application perspective is had in should studying achievement reforms in paddy breed.


Researcher says, asinine horse cross produces next filial generation (mulish) , and filial generation does not have normal fecundity. This kind of reproduction keeps apart a phenomenon to exist likewise in the plant, be like the sterility of the hybrid between subspecies of paddy Xian Jing. But scientists return discovery, put in a kind to be planted specially in paddy qualitative resource is called wide kiss and breed, or slant at long-grained nonglutinous rice, or slant at round-grained nonglutinous rice, it is normal that the offspring of they and long-grained nonglutinous rice and cross of round-grained nonglutinous rice is behaved but Yo.


Zhang Qifa academician says, help advance somebody's career the Xian Jing of paddy not of Yo and wide endophilicity coexist, a kind of very peculiar phenomenon is in biology evolution: Xian Jing become divided brought up the seed rice resource of rich diversity, also bring about reproductive segregation, and wide kiss and the existence of gene gives communication of the gene between Xian Jing subspecies to provide bridge, do not affect crossbred fertility with long-grained nonglutinous rice or cross of round-grained nonglutinous rice, have safeguard effect to the integral sex of seed rice. He expresses, effectively application is wide the sterility that can overcome the hybrid between subspecies of paddy Xian Jing with gene in person, use the powerful crossbred dominant position between Xian Jing subspecies to raise the yield of paddy thereby.


Wide use value gravely because of its with gene in person, a very important gene is considered as in group of domestic and international rice, be in early when our country starts 863 plans, study content with respect to what included this gene detached clone.


Zhangqi sent task group to begin the research of this gene from 1990, from genetic analysis, gene fixed position gives S5 gene to final clone, last a period of time 18 years, many 20 researcher that shares 7 research organizations participates in a project to consider. The successful clone of this gene is the crystallization that solidarity of our country scientist cooperates, august 12 " print of courtyard of American academy of sciences " the research paper that published this research group with cover article form.
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