Selection in segregating populations of ornamental pepper plants (<i>Capsicum annuum</i> L.) using multidimensional scaling

Costa, Maria do Perpetuo Socorro Damasceno; Rêgo, Elizanilda Ramalho do; Barroso, Priscila Alves; Silva, Anderson Rodrigo da; Rêgo, Mailson Monteiro do

doi:10.1590/0034-737X202067060007

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Plant Breeding Applied to Agriculture • Rev. Ceres 67 (6) • Nov-Dec 2020 • https://doi.org/10.1590/0034-737X202067060007 copy

Selection in segregating populations of ornamental pepper plants (Capsicum annuum L.) using multidimensional scaling¹ This work is part of the Doctoral Thesis of the first author.

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Multidimensional scaling is a multivariate analysis technique that can be used to exploit genetic diversity, aiming at the selection of Capsicum genotypes with desirable characteristics for in-pot ornamental purposes. This work aimed to select genotypes with ornamental potential within F4 populations of ornamental pepper plants. Three F4 families were used (17.18, 30.16, and 56.8). The genotype distance matrices were estimated based on qualitative and quantitative descriptors, separately, combining the standardized distances of Gower and Mahalanobis, respectively. The relation of the distance between genotypes was graphically studied through non-metric multidimensional scaling. Kruskal' Stress was used as the measured misadjustment of the nMDS solution. There is genetic diversity within the analyzed families, allowing to practice selection. The selection in family 17.18 of genotypes 6 and 32 is recommended, as well as in family 30.16 of genotypes 22 and 4, and family 56.8 of genotypes 15 and 36, since they present important characteristics for ornamental purposes. The selection of genotypes is more efficient when using mixed data since it provides a more complete genetic diversity in an improvement program.

Keywords:
Multivariate analysis; genetic diversity; Gower; Mahalanobis.

Universidade Federal de Viçosa Av. Peter Henry Rolfs, s/n, 36570-000 Viçosa, Minas Gerais Brasil, Tel./Fax: (55 31) 3612-2078 - Viçosa - MG - Brazil
E-mail: ceres@ufv.br

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[1] *Corresponding author: elizanilda@cca.ufpb.br

Family	Qualitative	Quantitative	Mixed
17.18	22.83 %	17.31%	23.52%
30.16	15.62%	20.00%	20.00%
56.8	20.00%	10.41%	19.59%

17.18	PH	CD	FBH	SD	LL	LW	FW	FL	LFD	SFD	NS	NF
1	32.0	26.0	16.0	0.49	3.81	1.53	0.73	1.56	0.97	0.26	30	46
2	31.0	35.0	12.5	0.50	2.00	1.67	0.45	1.05	0.87	0.33	25	46
4	30.0	31.0	15.0	0.47	3.00	1.90	0.40	0.92	0.84	0.36	19	39
6	23.0	28.0	15.0	0.59	2.13	0.88	0.34	0.84	0.74	0.25	15	35
28	23.0	26.0	16.0	0.44	3.52	1.31	0.30	0.79	0.74	0.29	12	51
32	23.0	37.0	11.0	0.64	3.25	1.24	0.69	1.10	0.95	0.34	28	30
30.16	PH	CD	FBH	SD	LL	LW	FW	FL	LFD	SFD	NS	NF
2	24.0	33.0	14.0	0.56	2.06	1.02	0.35	1.17	0.70	0.33	26	60
11	27.0	36.0	14.0	0.64	2.17	1.13	0.73	1.65	0.82	0.39	48	76
13	32.0	35.0	16.0	0.62	2.07	0.93	0.41	1.43	0.75	0.30	22	91
18	28.0	29.0	14.0	0.56	2.49	1.35	0.58	1.48	0.84	0.37	41	83
22	21.0	28.0	12.0	0.52	1.90	0.84	0.16	0.76	0.51	0.31	10	99
23	20.0	19.0	13.0	0.52	1.95	0.81	0.20	0.78	0.60	0.35	30	49
34	24.0	36.0	12.0	0.44	1.64	0.56	0.17	0.77	0.53	0.25	12	86
36	20.0	30.0	9.0	0.27	1.32	0.61	0.38	1.13	0.76	0.33	28	48
37	22.0	28.0	11.0	0.76	2.39	1.18	0.49	1.40	0.79	0.33	25	45
56.8	PH	CD	FBH	SD	LL	LW	FW	FL	LFD	SFD	NS	NF
5	25.0	33.0	13.0	0.42	3.14	1.25	0.61	1.22	0.64	0.32	47	61
15	31.0	31.0	14.0	0.48	3.10	1.54	0.90	1.72	1.03	0.30	30	35
32	22.0	25.0	13.0	0.65	2.76	1.26	1.31	2.25	1.18	0.29	27	38

30.16	CIM	CIF	CMF	FS	FPP	PPWS
2	Light green	Yellow /orange	Red	Triangular	Persistent	Persistent
4	Light green	Yellow	Orange	Triangular	Intermediate	Intermediate
12	Light green	Yellow	Orange	Triangular	Intermediate	Intermediate
25	Light green	Yellow	Orange	Triangular	Intermediate	Intermediate
45	Light green	Yellow/ orange	Red	Triangular	Persistent	Intermediate
30.16	SC	SS	GH	BD	LF	LS
2	Green	Angular	Intermediate	Intermediate	Dark green	Oval
4	Green	Angular	Intermediate	Intermediate	Dark green	Lanceolate
12	Green	Angular	Intermediate	Intermediate	Dark green	Lanceolate
25	Green	Angular	Intermediate	Intermediate	Dark green	Oval
45	Green	Angular	Intermediate	Intermediate	Light green	Oval
56.8	CIM	CIF	CMF	FS	FPP	PPWS
6	Purple	Brown /yellow	Orange	Triangular	Intermediate	Light
7	Green/Purple	Yellow	Orange	Triangular	Intermediate	Light
9	Purple	Brown /yellow	Orange	Triangular	Persistent	Light
15	Purple/Brown	Brown /yellow	Orange	Triangular	Persistent	Light
36	Purple	Yellow	Orange	Triangular	Intermediate	Light
56.8	SC	SS	GH	BD	LF	LS
6	Green/ strips	Cylindrical	Intermediate	Intermediate	Green	Oval
7	Green/ strips	Cylindrical	Intermediate	Intermediate	Green	Lanceolate
9	Green/ strips	Cylindrical	Erect	Scarce	Light green	Lanceolate
15	Green/ strips	Angular	Intermediate	Intermediate	Light green	Lanceolate
36	Green/ strips	Angular	Intermediate	Intermediate	Dark green	Lanceolate

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Selection in segregating populations of ornamental pepper plants (Capsicum annuum L.) using multidimensional scaling1 This work is part of the Doctoral Thesis of the first author.

ABSTRACT

Selection in segregating populations of ornamental pepper plants (Capsicum annuum L.) using multidimensional scaling¹ This work is part of the Doctoral Thesis of the first author.