In the conventional breeding procedure, gene recombinations are obtained by hybridizing varieties, or species, with different agronomic characteristics, and then selecting in the segregating generations for the genotype, or genotypes, with the most favorable combination of the characteristics of the parent strains. The initial phase of domestication represents a selection for increased adaptation to human cultivation, consumption, and utilization. Discover more publications, questions and projects in Field Crops. In the tropical and subtropical climates, rice may be grown throughout the year.
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These and the possibilities of further improvement are discussed in this chapter. The extent to which a crop species will set seed is an important concern with which the plant breeder must deal.
Added to Your Shopping Cart. They extend the natural forces by which present cultivated crop species have evolved and reached the forms in which we know them today. Corn is the leading grain crop in the United States, with production more than 2. What Is Plant Breeding?
Breeding Field Crops. Fifth Edition | Request PDF
Upon casual examination we brreeding be impressed with the similarity of the plants within the field. During the past half-century, it has become a major grain crop fkeld the United States Fig. Now over 60 plant breeders for private companies are working on variety development.
The challenge of the plant breeder is to develop better varieties. The Genetic Basis of Plant Breeding. There are several reasons for the late start in forage breeding research in the United States. It may be illustrated here quite simply by comparing two common crop plants, wheat and corn, which differ in their pollination method. Description Long recognized as the standard work in its field, this fifth edition of Breeding Field Crops deals with worldwide advances in plant breeding science and practice in recent years.
In earlier chapters, procedures were discussed by which plant breeders could extend the range of genetic variability in crop plants. Padi Oryza sativa L. The procedures were developed from Mendelian genetic principles and were expanded with developments in cytology, polyploidy, mutation induction, quantitative genetics, heterosis, male sterility, and related areas.
This study was designed to comparison between different methods for broad sense heritability BSHnarrow sense heritability NSH and number of genes N estimations in cotton. However, if we should compare two plants of corn in minute detail and make careful observations and tield measurements of the separate plant parts, we would find that individual plants differ in many respects.
Breeding Field Crops
You are currently using the site but have requested a page in the site. With hybridization in self-pollinated crops, a line combining genes from the parents is selected following several generations of inbreeding. Mutation may be genic, involving deletions, or structural changes within the physical limits of the gene; or chromosomal,involving the rearrangement, loss, or duplication of chromosome segments.
In the United States, the breeding of forage varieties did not receive the same attention in the early part of this century as the breeding of cereal varieties. Production of soybeans is centered in the Corn Belt and the lower Mississippi Delta.
Breeding Field Crops, 5th Edition | Agriculture | Subjects | Wiley
In the conventional breeding procedure, gene recombinations are obtained by hybridizing varieties, or species, with different agronomic characteristics, and then selecting crps the segregating generations for the genotype, or genotypes, with the most favorable combination of the characteristics of the parent strains.
In recent years a technology for genetic manipulation at the cellular level has emerged, which has a unique potential for supplementing traditional plant-breeding procedures. Concerns about the genetic erosion of crop genetic resources CGR were first articulated by scientists in the midth century and have since become an important part of national policies and international treaties.
These processes—gene recombination, polyploidy, and mutation—are not new innovations.
A hybrid variety differs from a variety produced by hybridization as described in Chapter 10 for self-pollinated crops.
Barley is tolerant of alkali, drought, or frost.
The rapid growth in production and importance of soybeans as a crop is unequalled in U.