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Table 9 Qualitative and quantitative traits of cowpea assessed during the study

From: Assessing the genetic diversity of cowpea [Vigna unguiculata (L.) Walp.] germplasm collections using phenotypic traits and SNP markers

No

Trait

Abbreviation

Trait description

Qualitative traits

 1

Flower colour

FLC

Flower colour intensity: violet-1, yellow − 2, white- 3

 2

Leaf green colour

LGC

Colour intensity: light-1, medium − 2, dark- 3

 3

Growth pattern

GTH

Type 1 - determinant, type 2- indeterminate, type 3- creeping

 4

Pod colour

PDC

Pod colour intensity; light green-1, deep green − 2, purple- 3

 5

Seed coat colour

STC

Primary colour intensity of the seed coat; reddish- brown −1, white − 2, purplish- brown − 3, brown - 4, black - 5,

 6

Leaf size

LFS

Size of the most tip leaf; small − 1, medium −2, big −3

Quantitative traits

 1

Days to 50% flowering

DTF

The number of days from sowing until 50% of the plants in a plot have visible flowers

 2

Days to 90% maturity

DTM

Days from date of sowing to the date when 90% of pods in a plot turn yellowish brown

 3

Number of pods per plant

NPP

Mean number of mature pods from 10 randomly selected and tagged plants in a plot

 4

Pod length

PDL

Mean length of 10 mature pods from randomly selected and tagged plants

 5

Number of seeds per pod

NSP

Mean weight of seed from mature pods of 10 randomly selected and tagged plants

 6

Seed size

SDS

Mean length of 10 randomly selected seed measured in millimetres

 7

Hundred seed weight

HSW

Weight of one hundred randomly selected seeds of a genotype measured in grams

 8

Grain yield

GYD

The average grain yield per plot and converted into kg ha−1 using the formula given above.