#The symbol for female pedigree is x plus#

IWIS makes certain assumptions concerning the syntactical analysis and semantic interpretation of pedigrees.

The word 'pedigree' as it is often used at CIMMYT is referred to as a selection history in this document. However, be aware that this definition is somewhat different from what is normally meant by the word 'pedigree' at CIMMYT. These terms are more fully defined in later.

#The symbol for female pedigree is x plus#

The following is a functional description of the Pedigree Management of IWIS.ДЇor the purpose of Pedigree Management, a pedigree is defined as: a cross name plus a selection history. What is needed is a structure for managing the complexity of pedigrees and their relationships. The limitations described above should not detract from the usefulness of the method for it has withstood the test of time and many organizations still use it. Another source of confusion results from reassignment of names by commercial seed companies and national breeding programs. The problem is further compounded when several sister lines are given different abbreviations. The problem then becomes one of recognizing and remembering what the abbreviations stand for. Such descriptions tend to become rather long after a few generations of crossing and are therefore given an abbreviated name. This notation gives an explicit description of the crossing and selection history of a line. The pedigree notation used by CIMMYT and many other breeding institutions is based on what is commonly known as the Purdy method (Crop Science, Vol. Given the way in which wheat pedigrees are identified this is not always easily determined. Many of the questions asked by wheat breeders fall intro two categories: Which lines are related to X? What information do we have about line X? Both of these questions imply that X can be clearly and unambiguously identified.