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Post by imgrimmer on Oct 24, 2019 14:05:07 GMT -5
Just an idea: Wouldn`t it be helpful to cross diploperennis to tripsacum to get an cold tolerant perennial plant to cross with maize afterwards? I found a paper saying such hybrids withstand 0F for 3 or 4 days were perennial and drought tolerant. Just an idea. I have no space and time to do it. link.springer.com/article/10.1007/BF02862921 |
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Post by keen101 (Biolumo / Andrew B.) on Oct 24, 2019 17:26:07 GMT -5
Just an idea: Wouldn`t it be helpful to cross diploperennis to tripsacum to get an cold tolerant perennial plant to cross with maize afterwards? I found a paper saying such hybrids withstand 0F for 3 or 4 days were perennial and drought tolerant. Just an idea. I have no space and time to do it. link.springer.com/article/10.1007/BF02862921 Not a bad idea. The last time i tried to grow Eastern Gamma Grass i was unable to germinate any (that i know of). It could be worth trying again, and is an interesting idea. The work done by Mary Eubanks is very interesting indeed. |
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Post by keen101 (Biolumo / Andrew B.) on Nov 8, 2019 16:51:40 GMT -5
Yes Andrew, I think you are the one who found the paper. I can’t find it either. Will update when I have progress. Found it! reed! I have an idea! Apparently you only need to cover one leaf on each plant to get them to flower early! I think this would work on non-day-neutral teosinte! www.google.com/podcasts?feed=aHR0cDovL2l0dW5lc2NvbnRlbnQudWNkYXZpcy5lZHUvbWVkaWEvMjAwOS9XSS9QTEIxMTIvMTAwLnJzcw&episode=aHR0cDovL2l0dW5lc2NvbnRlbnQudWNkYXZpcy5lZHUvbWVkaWEvMjAwOS9XSS9QTEIxMTIvUExCMTEyLTFfMjAwOS0wMy0wNS5tcDMThis course, taught by UC Davis plant biology professor John Harada, focuses on the mechanisms and control processes that underlie plant growth, development and response to the environment, with primary attention devoted to flowering plants. Topics are selected to emphasize developmental concepts applicable to several aspects of plant growth and development. Material is presented by discussing experiments employing the approaches of morphology, physiology, genetics, and cell and molecular biology that were used to discover the biological information. (The course is targeted to upper division undergraduate students who have taken an introductory biology course and a genetics course. The audience is primarily general biology majors who do not specialize on plants.) "Podcast" plant growth and development winter 2009, episode #4, transition to flowering. I wonder if this would help easier than the covering one leaf thing. www.htgsupply.com/products/agromax-730-nm-led/Far red led supplemental lighting. But I think you would only want to do it at the end of the day. www.maximumyield.com/far-red-lighting-and-the-phytochromes/2/17443 |
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Post by walt on Nov 13, 2019 12:09:38 GMT -5
Tripsicum and Zea diploperennis have very different growth habit.
Z. dip grows its rhizomes deep underground, yet isn't very cold tolerant.
Tripsicum rhizomes grow at the soil surface. Often, usually, the rhizomes can be seen by just brushing back the old growth, leaves, etc. Yet they can tack very hard freezes.
Back in the early 1980s, Dr. Galinat tried repeatedly to cross Z dip and T. dactyloides (the most winter-hardy species). They wouldn't cross in either direction. So he pollinated an amphiploid Z. maize x T. dactyloides hybrid plant with Z. dip pollen. He sent me an ear containing F1 seeds from this cross. The ear had 100% seed set, but it had few florets, so there were only a few seeds. All the seeds germinated easily, no embryo culture needed.
So the seedlings each had a single complete set of cromosomes from each species, Z. maize (donestic corn), Z. dip, and T. dactyloides.
The seedlings each had many tillers, many ears, and many tassels. They made no pollen. That was expected, as Zea=Tripsicum hybrids have always been male sterile, or at least no male fertile hybrids had been obtained at that time. Tripsicum chromosomes had been backcrossed into corn cytoplasm. The reverse had also been done. It turned out Zea cytoplasm is a male sterile cytoplasm for Tripsicum. Again the reverse is also true.
But the hybrids usually were somewhat female fertile, though with very low frequency, when they had 2 sets of domestic corn chromosomes and one set of Tripsicum chromosomes. Since corn x Z. dip hybrids had good fertility, we expected our seedling descibed above to make some seeds when crossed with pollen of corn, Z. dip, or Tripsacum. We tried all tree. None of them worked for us, though we pollinated every silk they produced, which were many.
Were our hybrids perennial? Sort of, yes. They did not make rhizomes, but if we kept building up the soil covering the roots higher and higher on the plants. But otherwise. they would climb out of the soil. And though perennial in the greenhouse, if ever replanted deeper, they were not freeze hardy.
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