Corn originated in the Balsas Valley in central Mexico between 5,000 and 1,000 years ago, and its ancestor was a plant called the Mulberry. It started as a hard-shelled single fruit, which was domesticated by the Indians into today's corn cob.

Maize, like humans, has a diploid chromosome, and the traits of its female and male flowers are determined by several alleles. These genes are female alleles: d1, d2, d3, d5, anl, D8, skl, and male alleles: ts1, ts2, ts4, Ts5, and Ts6. When these genes are recombined, they can form corn with only male flowers at the top, corn with female flowers at the top and loin, and corn with only female flowers at the top.

The plants needed for plum catkins are corn with only male flowers at the top and female flowers at the top. Because of the large-scale pollination, it is undoubtedly the female flower at the top that is better receptive to pollen. After several months of cultivation, the test field was filled with corn with female flowers on top, which was relatively short and flowered early. In another enclosed hut are several plants of corn with only male flowers at the top, which specialize in pollen. After the pollen is automatically collected by the machine, it is transported to the female plants in the experimental field for pollination.

In addition, the male ears are also pumped in advance in the maize experimental field that is de-emasculated, and the pollination machine automatically determines the maturity of the female flowers before pollination.

In the corn field, Li Su is checking the growth of corn and recording it on the slab.

"You're not even going back to the apartment now." Yu Ka saw that Li Xu was sometimes too busy to take care of eating, so he took the initiative to bring her a boxed lunch.

"Thank you, Sister Yuka, I'm dying of hunger." Li Xu took the lunch box and devoured it.

"How's the project going?" Uka asked with concern.

"We'll have to wait for the knot to know, and it's at least a month away." Li Xu shaving rice.

"The company's situation is okay, don't force yourself too much." Now Li Xu eats and sleeps in the company, working 18 hours a day, which makes Yuka feel distressed, after all, Li Xu is only 15 years old now.

"After all, Sister Yuka said that if I can make a new type of corn, I can get 90% of the patent rights. Just the patent fee, I can earn 1 million every year, how can I not fight for it! Li Xu's eyes flashed with stars.

"Haha, it's better to wait until you succeed before telling you." Yu Ka saw Li Xu with bright eyes and smiled, everyone is fighting for themselves, and this kind of struggle is interesting.

"That is definitely not as efficient as it is now, and now as long as I think of being able to earn such a large amount of money, my heart is full of energy, and I don't even play games." Li Xu dared to invest his savings in the project because he knew that there would be such a large income if the research and development was successful, and he rescued Li Xu from the edge of poverty at once.

"It's time, I'm going to work, will I bring you a bento in 6 hours?" Uka looked at the time on the AR glasses and said.

"Thanks, Sister Uka. Today is Yaya's 8th birthday, and you still have to accompany Yaya. I'll just go eat by myself and take a walk. Li Xu said, then turned around and took out a gift box from his bag and handed it to Yu Ka, "This is my gift to Yaya, please ask Sister Yu Ka to help hand it over." ”

"Okay, that girl will be happy." Because it is a gift from Li Xu to Yaya, Yu Ka will not refuse or thank her, she is just an intermediary, and Yaya herself will say thank you.

After Yu Jia left, Li Xu continued to squat in the corn field to record the growth of corn.

"Are you hungry?" Chen Dai lifted the lunch box and shook it in front of Li Xu.

"I just finished eating." Li Xu smiled, continued to work, and ignored Chen Dai.

"Cut!"

Chen Dai sat next to her, very unhappy.

"Okay, okay, I'm free in the afternoon, let's go to the barbecue together."

"Really?" Chen Dai immediately regained her spirits, "I just happened to have news, I'll tell you when I eat barbecue." ”

"It just so happens that I have something for you too."

"Okay, in a word, it's hard to chase the horse." Chen Dai left satisfied.

Or at the Kelaixiang Hotel, the robot waiter serves the food and cleans up the table in an orderly manner, and the boss hastily went to an academic conference an hour ago to discuss the latest hot articles.

"Any news?" Chen Dai put the roasted piece of pork on a plate, dipped it in chili powder, put it in her mouth and chewed it carefully, "Hmm! That's the taste, it's numb and spicy. ”

"I'm making progress, and the article has been sent to major biology magazines." Chen Dai brushes a bunch of lamb with oil and puts it on a net to roast.

"Really! Congratulations, congratulations. Li Xu said happily, and then put a piece of half-cooked beef into Chen Dai's plate.

"It's not a project outcome, but it's a good academic outcome."

"No, no, it's not good, it's going down in history. But you have to be prepared for the storm, and sometimes it's annoying to tell the truth. Li Xu remembered the story he heard in his previous life, and couldn't help but worry about Chen Dai.

"Stormy? Then I'm Haiyan. Chen Dai was breezy and not worried at all.

"By the way, what are you going to give me?" Chen Dai picked up the beef, put it in her mouth, and chewed it fiercely

"I found a wild weed in Yaya's field." Li Xu put a string of square tofu pieces into a net to bake, when the skin is browned, take it out and put it on a plate, cut one side with a knife, spoon in the pepper and chili powder.

"Come, this is the way I eat it in my hometown, tofu curd. Taste it, it's my congratulatory gift. Li Xu picked up a piece of processed tofu and put it in front of Chen Dai's eyes.

Chen Dai looked at the hot tofu cubes coming out of the incision in front of her, reached out to brush the hair next to her ears, and stretched out her head to bite Li Xu's chopsticks. The slender snow-white neck tribe is in Li Xu's eyes. Chen Dai pursed her lips and retreated to her seat, closing her eyes and savoring it. The tofu has the unique desire to melt in the mouth, and then a fiery sensation explodes in the mouth, catching up with the fragrant tofu, and the fresh, spicy and numb taste spreads all over the taste buds.

"Delicious!" Chen Dai gave her own evaluation, "You just said that you found a kind of weed, what is it?" ”

"The weeds, I've done the preliminary treatment, and they're in the incubator. The weeds are also C4 plants, and you can try the C4 gene for the barnyard seeds. ”

After discovering the mutated corn in Yaya's field, Li Xu often went to Happy Farm to check it out, hoping to find more mutant plants. During her investigation, she discovered that a weed called the weed was common. This is a common weed in the field in the previous life, and its vitality is extremely tenacious. If it grows in a rice field, it is silly indistinguishable between the weed seedlings and the rice seedlings in the early stage. In the later stages, the weeds release substances that prevent the rice from growing.

However, the weeds are a carbon-four plant, and compared with corn, the living environment and form of the weeds are more similar to rice. Therefore, Li Xu wanted to suggest that Chen Dai introduce the C4 gene of barnyard into rice.

"You're not kidding, weeds aren't even a food crop, and with the barnyard carbon four genes, maybe the rice doesn't even harvest CD." Chen Dai stood up in surprise.

"No, I really think I can give it a try, after all, the living environment of barnyard is very similar to that of rice." Li Xu is serious, the rice project seeks to turn rice into a C4 plant, in this case, as long as it is a C4 plant genes, you can try it, you don't have to be limited to corn.

"......" Chen Dai felt Li Xu's sincere gaze and believed that she thought so, so she sat down and said, "Okay, I'll listen to your suggestion and go back and try to change the gene source." ”