Descriptor: DURATION (DURATION)

Definition:

The length of time that the plants ordinarily live before flowering and death. The biennials require a cold treatment before flowering, while annuals do not.

Crop:

SWEET-CLOVER

Category:

Phenological descriptors

Status:

Crop Germplasm Committee approved

Data Type:

Alpha/numeric descriptor

Maximum Length:

Comment:

The sample population size and frequency in percent are to be included with each observation code. Therefore a single evaluation of one accession, can require up to four observations in GRIN.

Responsible Site:

North Central Regional Plant Introduction Station (NC7)

Studies or environments

Distribution of Values for DURATION (DURATION)

Code	Definition	Number of Accessions
ANN	percent annual	95
BIE	percent biennial	248
OTH	percent other (explain) The "OTH" category is intended to include unusual exceptions and therefore allow for comprehensive data.	3
UNK	percent that did not flower when expected, so unknown	29
WAN	percent winter annual These perform poorly in hot summer field conditions, but do well in a winter greenhouse or similar conditions.	35