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Hybrid Rice Engineered With CRISPR Can Clone Its Seeds
A gene editing technique has been used to produce asexual rice, which could carry traits such as high yields and drought resistance. From a report:
After more than 20 years of theorizing about it, scientists have tweaked a hybrid variety of rice so that some of the plants produce cloned seeds. No plant sex necessary. The feat, described earlier this month in Nature, is encouraging for efforts to feed an increasingly crowded world. Crossing two good varieties of grain can make one fabulous one, combining the best versions of genes to give crops desirable traits such as higher yields. But such hybrid grain marvels often don't pass along those coveted genetic qualities to all seeds during reproduction. So farmers who want consistently higher yields have to pay for new hybrid seeds every year.
This new lab version of hybrid rice would preserve those qualities through self-cloning, says study coauthor Venkatesan Sundaresan, a plant geneticist at the University of California, Davis. Though 400 kinds of plants, including some blackberries and citruses, have developed self-cloning seeds naturally, re-creating those pathways in crop plants has "been harder than anyone expected," Sundaresan says. He and his colleagues got the idea for the new research while studying "how a fertilized egg becomes a zygote, this magical cell that regenerates an entire organism," as Sundaresan puts it. The researchers discovered that modifying two sets of genes caused the japonica rice hybrid called Kitaake to clone its own seeds. First the team found that in a fertilized plant egg, only the male version of a gene called BABY BOOM1 found in sperm triggered the development of a seed embryo. So the scientists inserted a genetic starter switch, called a promoter, that let the female version of the same gene do the same job. No male would be necessary to trigger an embryo's development. |
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| There are no conversations. |
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| cauz |
Dec. 29, 2018, 4:32 p.m. |
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| Zaha Hadid |
For many years, I hated nature. As a student, I refused to put a plant anywhere - a living plant, that is. Dead plants were OK. |
| John Steinbeck |
It has always seemed strange to me... the things we admire in men, kindness and generosity, openness, honesty, understanding and feeling, are the concomitants of failure in our system. And those traits we detest, sharpness, greed, acquisitiveness, meanness, egotism and self-interest, are the traits of success. And while men admire the quality of the first they love the produce of the second. |
| Nina Fedoroff |
As people around the world become more affluent, they are demanding diets richer in animal protein, which will require ever more robust feed crop yields to sustain. |
| David Baltimore |
What does gene A do? What does gene B do? What does it do in different contexts? What's its importance? We know the answer to that for a very small number of genes, the ones that made themselves evident many years ago. |
| David Eagleman |
The same stimuli in the world can be inducing very different experiences internally and it's probably based on a single change in a gene. What I am doing is pulling the gene forward and imaging and doing behavioural tests to understand what that difference is and how reality can be constructed so differently. |
| Joe Dante |
Editing is where movies are made or broken. Many a film has been saved and many a film has been ruined in the editing room. |
| Jessica Hagedorn |
I'm part Spanish. My paternal grandfather came from Spain via Singapore to Manila. On my mother's side it's more mixture, with a Filipino mother and a father who was Scotch Irish-French; you know, white American hybrid. And I also have on my father's side a great-great-grandmother who was Chinese. So, I'm a hybrid. |
| Scott Adams |
Scientists will eventually stop flailing around with solar power and focus their efforts on harnessing the only truly unlimited source of energy on the planet: stupidity. I predict that in the future, scientists will learn how to convert stupidity into clean fuel. |
| Nina Fedoroff |
In agriculture, people have taken wild plants that can't be eaten by people - and turned them into wonderful food sources. And that's because genomes can change, and people working with plants have picked mutations. Mutations are nothing more than genetic changes. |
| Zach Galifianakis |
I used to be really cute. I could send you earlier photos where I'm stunning. But I've gained about twenty pounds over the past two years, and the more weight I've put on, the more success I've had. If you drew a diagram of weight gain and me getting more work, a mathematician would draw some conclusions from that. |
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