Abstract
ABSTRACT The cultivation of potted peppers as ornamental plants has increased considerably throughout the planet. In Brazil, this crop is more recent and still lacks cultivars. In order to increase the available variability and obtain new cultivars, the interspecific hybridization is very useful in add a desirable attribute that occurs in one species to another species, resulting in a new cultivar of agronomic interest. The objective of this study was to characterize parents and interspecific hybrids based on 27 quantitative traits and evaluate their genetic diversity by multivariate procedures. Parents of seven pepper genotypes were crossed, and, seven hybrids were generated. The experiment was conducted in a completely randomized design. Data were subjected to analysis of variance, and means were subsequently grouped by Scott-Knott’s method. Tocher’s method was utilized based on Mahalanobis distance, and the relative importance was evaluated by Singh’s method. The effects of treatment were significant by F test at 1 and 5% probability for all studied traits, except for anther length and titratable acidity. According to Scott-Knott’s test, the genotypes were grouped into two to eight classes. By Tocher’s method, the genotypes were separated into four groups. The first three canonical variables explained 92.02% of the total variance. By Singh method, fruit yield per plant was the trait that most contributed to the divergence explaining 21% of the total variance. The studied parents and hybrids diverged for the evaluated traits; however, there was difficulty in obtaining good interspecific hybrids with traits of importance, wherein combinations HS1×L7, L2×L6, and HS1×L2 met these requirements.
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Claims 11
Claim · model-written summary
Genotype effects were significant for the studied traits except anther length and titratable acidity.
Verbatim
t0“ornamental pepper”
e0“The effects of treatment were significant by F test at 1 and 5% probability for all studied traits, except for anther length and titratable acidity.”
Claim · model-written summary
Anther length and titratable acidity were exceptions to significant treatment effects.
Verbatim
t0“ornamental pepper”
e0“The effects of treatment were significant by F test at 1 and 5% probability for all studied traits, except for anther length and titratable acidity.”
Claim · model-written summary
Scott-Knott grouping classified genotypes into two to eight classes.
Verbatim
t0“ornamental pepper”
e0“According to Scott-Knott’s test, the genotypes were grouped into two to eight classes.”
Claim · model-written summary
Tocher grouping separated genotypes into four groups.
Verbatim
t0“ornamental pepper”
e0“By Tocher’s method, the genotypes were separated into four groups.”
Claim · model-written summary
The first three canonical variables explained 92.02% of total variance.
- Taxon
- ornamental peppert0
- Outcome
- total variancee0
- Value
- 92.02%e0
- Qualifier
- first three canonical variablese0
Not reportedMaterialDirection
Verbatim
t0“ornamental pepper”
e0“The first three canonical variables explained 92.02% of the total variance.”
Claim · model-written summary
Fruit yield per plant contributed most to divergence, accounting for 21% of total variance.
Not reportedMaterialDirection
Verbatim
t0“ornamental pepper”
e0“By Singh method, fruit yield per plant was the trait that most contributed to the divergence explaining 21% of the total variance.”
Claim · model-written summary
Studied parents and hybrids diverged for evaluated traits.
Verbatim
t0“ornamental pepper”
e0“The studied parents and hybrids diverged for the evaluated traits”
Claim · model-written summary
Obtaining useful interspecific hybrids was difficult.
Verbatim
t0“ornamental pepper”
e0“there was difficulty in obtaining good interspecific hybrids with traits of importance”
Claim · model-written summary
Combination HS1×L7 met the desired trait requirements.
Verbatim
t0“ornamental pepper”
e0“combinations HS1×L7, L2×L6, and HS1×L2 met these requirements.”
Claim · model-written summary
Combination L2×L6 met the desired trait requirements.
Verbatim
t0“ornamental pepper”
e0“combinations HS1×L7, L2×L6, and HS1×L2 met these requirements.”
Claim · model-written summary
Combination HS1×L2 met the desired trait requirements.
Verbatim
t0“ornamental pepper”
e0“combinations HS1×L7, L2×L6, and HS1×L2 met these requirements.”