Plant Genetics by Carl-erik Tornqvist

By Carl-erik Tornqvist

Это научно-популярная книга о генетике растений. Всё очень хорошо и наглядно рассказано. Книга содержит много хороших рисунков.
1 historical past of Plant Genetics
2 evaluation of Genetics
3 Meiosis, Mitosis, and Alternation of Generations
4 Polyploid Plants
5 the range of vegetation: Nature’s Palette of Genes
6 Genetically managed Processes
7 selecting features of Genes
8 Agricultural Advances
9 Plant Genomics and past

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The DNA that the seedless watermelon has in its reproductive cells is not distributed evenly. Therefore, the reproductive cells of the seedless watermelon have too much or too little genetic information. Without the “right” genetic information, meaning the type and amount of genes, the watermelon cannot create a normal seed. When the seedless watermelon is cross-fertilized with pollen from a seed watermelon, the resulting fusion of DNA is not balanced and cannot make a seed. The male watermelon plant has balanced DNA content in its gametes (sex cells), so it can reproduce normally on its own.

Therefore, just like the seedless watermelon, Origin of Bread Wheat Triticum aestivum, the grass from which flour is made to bake bread, also known as bread wheat, is a modern cultivated polyploid crop and is globally one of the top five most agronomically important. So, what is the origin of bread wheat? Using genetic markers, researchers have found ancient relatives of bread wheat in the Middle East. About 8,000 years ago, two grandparent diploid grass varieties cross-fertilized to form a hybrid variety.

The male watermelon plant has balanced DNA content in its gametes (sex cells), so it can reproduce normally on its own. The female plant, however, has uneven 42 Polyploid Plants pairing of chromosomes (DNA strands) when it makes the reproductive cells in the process of meiosis, so it cannot reproduce on its own. The genetic content of the fruit is separate from the seed because the fruit comes from only the mother cells. The female structure on the plant that becomes the fruit is the ovary of the flower.

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