Help! Meaning of "cv"

Wayne Parrott wparrott at uga.cc.uga.edu
Wed Oct 4 17:07:05 EST 1995


In article <DFxBsE.tKo at ns1.nodak.edu> dahleen at badlands.NoDak.edu (Lynn S Dahleen) writes:
>From: dahleen at badlands.NoDak.edu (Lynn S Dahleen)
>Subject: Re: Help! Meaning of "cv"
>Date: Wed, 4 Oct 1995 12:24:13 GMT

>Joao Miranda (jmiranda) wrote:

>: I need to know what is the meaning of the abbreviation "cv" on following 
>: sentence:

>:       - Samples of 16 species and cv of pineapples were analysed for 
>:       bromelain activity.


>The cv above probably means "cultivar", which are unique genotypes bred 
>by plant breeders for specific traits.

Let's also get rid of the idea that cultivars are unique genotypes.  
While some cultivars are unique genotypes (i.e., asexually progated cultivars, 
hybrids, and self-pollinated cultivars derived from a single, homozygous 
seed), the rest would not be.  This includes cultivars of cross-pollinated, 
seed derived crops, and cultivars consisting of blends or mixtures of 
self-pollinated crops (including early-generation composites).

A simple definition for a cultivar is from Fehr's Principles of Cultivar 
Development.  It states that

"Variety:  Subdivision of species for taxonomic classification.  Used 
interchangeably genetically with the term cultivar to denote a group of 
individuals that are distinct genetically from other groups of individuals in 
the species."

Thus, the individuals in a cultivar are expected to have a distinguishing 
genetic characteristic in common, but other than that, need not be of the same 
genotype.

Finally, there is nothing to say that a cultivar must be the result of a 
breeding program.  Land races, ecotypes (whatever may be the difference 
between these two terms), and even individual genotypes collected from the 
wild have at various times been released as cultivars.



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