Question

Which statement is correct about the center of origin of plants?
A. More diversity in improved variety.
B. Frequency of dominant genes is more.
C. Climatic condition more favorable
D. None

Answer 1

Hint: Theories of plant genetic diversity was proposed by Nikolai Ivanovich Vavilov. He is a Russian botanist and geneticist. He is famous for identifying centers of origin of cultivated plants. He carried out research and study for the improvement of crops like corn, wheat, and other cereal crops.

Complete answer: The basic of plant breeding is to locate the origin of crop plants. In order to avoid genetic erosion, loss of habitat, increased urbanization, and loss of germplasm caused by the loss of ecotypes and landraces. A Vavilov Centre is an original center for the domestication of plants in the world which was first indicated by Nikolai Ivanovich Vavilov. The center of origin of plants is also considered as the center of diversity. Regions, where a high diversity of crop wild relatives can be found, is called Vavilov centers which represent the natural relatives of domesticated crop plants. A geographical area consists of groups of organisms, either wild or domesticated, where the development of its distinctive properties took place first is called center of origin. Nikolai Ivanovich Vavilov was the first to identify centers of origin in 1924. Nikolai Ivanovich Vavilov proposed a different center of origin on the basis of two criteria. There is a large amount of variation in crops and the occurrence of wild relatives.
So, option A is the correct option.

Note: Gene banks help in preserving germplasm. Gene bank refers to the collection of a large number of seeds but now it is replaced by frozen stem sections. Nikolai Ivanovich Vavilov divided the centers into 12 regions in the year 1935.