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Most users ever online was 6 on Tue Dec 22, 2015 4:08 pm
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Gene For Better Rice Found :

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Gene For Better Rice Found :

Post by Sk on Sat Jul 18, 2015 7:08 am

Scientists have found a gene that regulates rice
quality, making it possible to breed high quality
rice without a compromise in yield. Two independent research labs in China identified
a gene, called GW7 or GL7, in hybrid rice grains
that regulates grain quality that allows breeding
rice of fine quality without a compromise in yield.
Their work provides a foundation for rice
scientists to simultaneously improve quality and quantity of rice crops. Before this, an increase in
yield almost always reduced grain quality. The researchers took advantage of molecular
genetics and outbred rice crops to obtain rice with
long, slender grains and reduced chalkiness. They
then analysed the genome of the superior crop to
identify the gene, GL7 or GW7, that is responsible
the quality grain trait. The higher the expression of this gene, through an increase in number of
copies of that allele, was correlated with a more
slender rice grain. Although very similar in their findings and
conclusions, the authors from the two papers
differ in their opinions about the mechanism
underlying the increased grain length in the crop.
Professor Fu Xiangdong, from Chinese Academy of
Sciences in Beijing, explained that “[this was] a result of increased cell division in the longitudinal
and decreased cell division in the transverse
direction [in the rice grain].” On the other hand, Dr. Xiong Guosheng, from the
Chinese Academy of Agricultural Sciences in
Shenzhen, explained, “[GL7] regulates cell
longitudinal elongation.”
No matter the slight difference, there is clearly an
increase in grain length associated with increased expression levels of this gene. Rice growers have
already been taking advantage of genetics to
breed rice of superior quality and yield. For
instance, rice carrying the beneficial GL7 and gs3
genes (Yuefeng) is already available in the market
in China, says Xiong. For full story:
http://www.asianscientist.com/2015/07/in-the-lab/cas-rice-genetics-gw7-gl7/
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