Estimates of genetic parameters and correlations in melon accessions of the <i>momordica</i> group

Valadares, Ricardo N; Melo, Roberto A; Silva, Jordana Antônia S; Araújo, Ana Luisa R; Silva, Fabian S; Carvalho, José Luiz S; Menezes, Dimas

doi:10.1590/S0102-053620170413

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Pesquisa • Hortic. Bras. 35 (4) • Oct-Dec 2017 • https://doi.org/10.1590/S0102-053620170413 copy

Estimates of genetic parameters and correlations in melon accessions of the momordica group

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The melons of momordica group constitute an important vegetable of the Curcubitaceae family, grown in many Brazilian cities, mainly by small farmers in the Northeast and some of southern Brazil. Since there are few or no studies about this botanical group, the authors aimed to estimate genetic parameters and genetic, phenotypic and environmental correlations of the commercial character of 23 melon accessions from the momordica group, seeking information to be used in breeding programs. Data were obtained from an experiment installed in randomized block design in eight replications, performed at the greenhouse of Rural Federal University of Pernambuco, between April and July 2013. In a general way, the assessed accesses showed high genetic variability, where the estimates of heritability, coefficient of genetic variation and reason (CV_g/CV_e) or indice b expressing values of high magnitude for the major evaluated characteristics. The genetic correlations presented similar traces and superior values when compared with their phenotypic and environmental correlations for the most of the assessed pairs, except for the pair CFr (fruit length) x MFr (average fruit mass). Positive and high magnitude correlations were obtained for the association between Epo (pulp thickness) and Tso (solids soluble content) and MFr, Tso x CMa (number of days from flowering to maturation), MFr x CMa, while the RFr (length/width ratio of the fruit) is negatively correlated with the most features, indicating that the selection should be carried out to obtain more round and heavier fruits which show higher values of pulp thickness.

Keywords:
melo var. momordica; genetic diversity; genetic correlations; snap melon; heritability

Acessos	DPe (mm)¹	TCi (mm)¹	CFr (cm)¹	LFr (cm)¹	RFr¹	EPo (cm)¹	TSo (%)¹	MFr (kg)¹	FMa (dias)¹	FFe (dias)¹	CMa (dias)¹
A-01	6,20 b	3,50 e	31,04 c	10,06 e	3,11 b	2,31 d	2,45 e	1,41 c	35 a	48 a	66 d
A-02	6,40 b	3,50 e	35,66 b	10,76 d	3,31 b	2,46 d	2,57 e	1,57 c	36 a	47 a	70 c
A-03	7,20 a	3,30 e	33,65 b	11,11 d	3,04 b	2,65 d	2,94 e	1,71 c	35 a	45 b	70 c
A-04	6,10 b	2,90 e	33,38 b	9,66 e	3,70 a	2,41 d	2,42 e	1,28 c	35 a	47 a	69 c
A-05	6,40 b	3,00 e	33,64 b	10,63 d	3,17 b	2,47 d	2,69 e	1,56 c	35 a	45 b	68 d
A-06	6,70 a	2,60 e	33,82 b	10,18 e	3,34 b	2,30 d	2,83 e	1,47 c	37 a	48 a	71 c
A-07	5,53 b	2,50 e	29,69 c	8,53 f	3,71 a	2,02 d	2,84 e	1,04 c	36 a	43 c	66 d
A-08	6,90 a	2,60 e	35,81 b	11,15 d	3,27 b	2,78 c	2,49 e	1,71 c	33 b	45 b	70 c
A-09	6,50 b	3,20 e	31,28 b	9,83 e	3,19 b	2,55 d	2,45 e	1,40 c	36 a	40 d	67 d
A-10	7,60 a	6,30 d	26,21 d	11,09 d	2,36 c	3,10 c	5,34 d	1,52 c	30 c	38 d	75 b
A-11	6,40 b	2,80 e	35,49 b	10,55 d	3,36 b	2,69 d	2,82 e	1,66 c	34 a	40 d	70 c
A-12	6,40 b	2,80 e	34,01 b	10,85 d	3,17 b	3,08 c	2,57 e	1,43 c	36 a	44 b	67 d
A-13	7,20 a	2,50 e	30,67 c	9,63 e	3,33 b	2,32 d	2,91 e	1,34 c	36 a	44 b	68 d
A-14	6,10 b	3,10 e	35,27 b	10,89 d	3,25 b	2,43 d	2,82 e	1,56 c	34 a	43 c	69 c
A-15	6,60 b	2,90 e	31,94 c	10,50 d	3,03 b	2,26 d	2,71 e	1,36 c	35 a	45 b	69 c
A-16	6,90 a	2,90 e	34,89 b	10,78 d	3,03 b	2,54 d	2,49 e	1,49 c	35 a	45 b	70 c
A-17	6,40 b	2,70 e	34,43 b	11,08 d	3,21 b	2,70 d	2,76 e	1,64 c	36 a	45 b	69 c
A-18	7,20 a	2,80 e	39,70 a	12,80 c	3,09 b	2,86 c	2,78 e	2,22 b	36 a	45 b	71 c
A-19	6,50 b	4,30 e	31,88 c	12,38 c	2,72 b	3,27 c	2,85 e	1,96 b	35 a	42 c	71 c
A-20	7,00 a	8,80 c	31,37 c	16,23 a	1,94 d	4,98 a	6,29 c	2,80 a	38 a	44 b	81 a
A-21	6,80 b	9,90 c	25,23 d	12,41 c	2,05 d	2,93 c	5,86 c	1,49 c	36 a	42 c	76 b
A-22	6,60 b	14,50 a	23,05 e	14,27 b	1,61 e	4,09 b	9,42 a	1,76 c	35 a	42 c	73 b
A-23	7,10 a	11,40 b	22,45 e	13,34 b	1,63 e	3,47 c	8,74 b	1,92 b	36 a	43 c	75 b
Mínimo	5,5	2,5	22,45	8,53	1,62	2,03	2,42	1,04	30	38	66
Máximo	7,6	14,5	39,7	16,23	3,71	4,98	9,42	2,8	38	48	81
Média	6,64	4,56	31,94	11,25	2,94	2,81	3,65	1,62	35	44	70
CV(%)	10,42	30,88	9,54	9,42	11,88	25,83	18,25	23,19	5,23	6,11	4,08

Parâmetros genéticos	σ²_F	σ²_A	σ²_G	h² (%)	CV_g (%)	CV_e (%)	b(CV_g /CV_e )
DPe (mm)	0.0063	0,0048	0,0015	71,77	5,88	10,42	0,56
TCi (mm)	0.1280	0,0199	0,1081	97,75	72,04	30,89	2,33
CFr (cm)	26,2504	9,3008	16,9496	93,58	12,89	9,55	1,35
LFr (cm)	3,8343	1,1234	2,7109	95.08	14,64	9,42	1,55
RFr	0,4691	0,1223	0,3468	95,78	20,02	11,89	1,68
EPo (cm)	0,8950	0,5276	0,3674	84,78	21,56	25,83	0,83
TSo (%)	4,5338	0,4451	4,0887	98,66	55,34	18,26	3,03
MFr (kg/fruto)	0,2514	0,1417	0,1097	86,10	20,41	23,20	0,88
FMa (dias)	5,0879	3,3929	1,6950	79,99	3,70	5,23	0,71
FFe (dias)	12,9688	7,1803	5,7885	86,58	5,48	6,11	0,90
CMa (dias)	20,30	8,2788	12,0292	92,08	4,93	4,09	1,21

Caracteres		TCi (mm)	CFr (cm)	LFr (cm)	RFr	EPo (cm)	TSo (cm)	MFr (cm)	FMa (dias)	FFe (dias)	CMa (dias)
DPe (cm)	r _F ¹	0.261^ns	-0.134^ns	0.425*	-0.461*	0.364^ns	0.322^ns	0.445*	-0.249^ns	-0.193^ns	0.510*
	r _G ²	0.322^ns	-0.200^ns	0.499^ns	-0.557^ns	0.489^ns	0.389^ns	0.497^ns	-0.289^ns	-0.213^ns	0.631^ns
	r _E ²	-0.107^ns	0.224**	0.107^ns	0.007^ns	-0.082^ns	-0.077^ns	0.274**	-0.125^ns	-0.130^ns	-0.017^ns
TCi (mm)	r _F ¹		-0.813**	0.744**	-0.938**	0.736**	0.977**	0.397^ns	0.113^ns	-0.303^ns	0.710**
	r _G ²		-0.850^ns	0.766^ns	-0.965^ns	0.796^ns	0.990^ns	0.431^ns	0.124^ns	-0.326^ns	0.753^ns
	r _E ²		-0.005^ns	0.167*	-0.142**	0.200*	0.268**	0.029^ns	0.048^ns	-0.059^ns	-0.093^ns
CFr (cm)	r _F ¹			-0.306^ns	0.740**	-0.387^ns	-0.819^ns	0.062^ns	0.018^ns	0.420*	-0.419*
	r _G ²			-0.362^ns	0.768^ns	-0.440^ns	-0.851^ns	-0.007^ns	0.032^ns	0.474^ns	-0.459^ns
	r _E ²			0.627**	0.258**	0.054^ns	-0.019^ns	0.722**	-0.089^ns	-0.076^ns	0.097^ns
LFr (cm)	r _F ¹				-0.833**	0.935**	0.723**	0.887**	0.223^ns	-0.135^ns	0.852**
	r _G ²				-0.857^ns	1.028*	0.742^ns	0.918^ns	0.255^ns	-0.153^ns	0.906^ns
	r _E ²				-0.340**	0.133ns	0.178**	0.681**	0.004^ns	0.048^ns	0.066^ns
RFr	r _F ¹					-0.800**	-0.924**	-0.548**	-0.060^ns	0.348^ns	-0.793**
	r _G ²					-0.883^ns	-0.946^ns	-0.605^ns	-0.071^ns	0.394^ns	-0.849^ns
	r _E ²					-0.064^ns	-0.156^ns	0.013^ns	0.021^ns	-0.141*	0.068^ns
EPo (cm)	r _F ¹						0.729**	0.813**	0.170^ns	-0.276^ns	0.819**
	r _G ²						0.792^ns	0.938^ns	0.233^ns	-0.305^ns	0.939^*
	r _E ²						0.094^ns	0.076^ns	-0.129^ns	-0.108*	-0.096^ns
TSo (cm)	r _F ¹							0.404^ns	0.078^ns	-0.329^ns	0.718**
	r _G ²							0.443^ns	0.090^ns	-0.350^ns	0.753^ns
	r _E ²							-0.100^ns	-0.040^ns	-0.124^*	0.024^ns
MFr (cm)	r _F ¹								0.207^ns	-0.041^ns	0.730**
	r _G ²								0.260^ns	-0.050^ns	0.818^ns
	r _E ²								-0.051^ns	0.018^ns	0.015^ns
FMa (dias)	r _F ¹									0.467*	0.098^ns
	r _G ²									0.529^ns	0.105^ns
	r _E ²									0.165*	0.061^ns
FFe (dias)	r _F ¹										-0.251^ns
	r _G ²										-0.289^ns
	r _E ²										0.069^ns

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[TFN1] DPe= diâmetro do pedúnculo (peduncle diameter); TCi= tamanho da cicatriz do pistilo (pistil scar size); CFr = comprimento do fruto (fruit length); LFr = largura do fruto (width of the fruit); RFr = razão comprimento/largura do fruto (length/width ratio of the fruit); EPo = espessura de polpa (pulp thickness); TSo = teor de sólidos solúveis (soluble solids content); MFr = massa média dos frutos (fresh mass of the fruits); FMa = número de dias para o florescimento masculino (days to male flowering); FFe = número de dias para o florescimento feminino (days to female flowering); CMa = número de dias para a maturação dos frutos (days until fruit maturity). ¹Médias seguidas de letras diferentes na coluna diferem entre si pelo teste de Scott-Knott (p<0,05). (averages grouped by Scott-Knott test, p<0.05).