![]() In addition, the produce from one plant has a significant commercial value when viewed against the background of the total crop. Here the flowers are relatively large, easily handled and one pollination produces many seeds. More favourable economic conditions are found in some horticultural crops, notably tomatoes, egg plants, cucurbits and onions. Two people have been killed inside a month, and now a monster croc has been captured a hybrid grown huge with hybrid-vigor and in the Everglades, a new and. This is an expensive process and one which is a serious obstacle to the commercial utilization of hybrid vigour, particularly with agricultural crops. Given the opportunity, it is the one big predator that will go for you every single time. In general, heterosis refers to increase in stature, biomass, and fertility of a hybrid that is superior to one or both parents. ![]() In plants, this is basically achieved by a greater proliferation of cells in some but not all tissues (2). Maximal expression of heterosis is shown in F 1 hybrids, and hence, in crops which are raised from seed, the crosses must be repeated to keep up a continuous supply of planting material. Heterosis or commonly known as hybrid vigor is evolutionarily defined as that the heterozygotes have higher fitness in a population than the homozygotes. Hybrid vigor, or heterosis, is the increase in stature, biomass, and fertility that characterizes the progeny of crosses between diverse parents such that the F1 is superior to the better of the two parents. In this connexion, it is note-Worthy that early-maturing hybrids have made possible the growing of corn in many new areas of Europe (Jugenheimer 1955). Improved vigour may enable the plant to overcome environmental hazards and thereby enhance yield. These genetic mechanisms are not mutually exclusive, and we find statistical support for both overdominant and recombinant contributions to hybrid vigor in larval tiger salamanders. Müntzing (1954) finds that the superior yield of F 1 hybrids of tetetraploid rye is the result of small increases in several components of yield for example, a better stand of plants per plot, more flowers per plant and improved set of seed per inflorescence. Hybrid vigor may be caused by heterozygote advantage (overdominance) or recombinant hybrid vigor (due to epistasis or complementation). These benefits may be produced in various ways. Hybrid vigour is of interest to the plant breeder because of its beneficial effects on the yield and quality of domestic plants.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |