Genetic determination of characteristics related to semi-mechanized coffee harvests

Dias, Rodrigo Elias Batista Almeida; Dias, Rafael Antônio Almeida; Botelho, César Elias; Abrahão, Juliana Costa de Rezende; Rezende, Tiago Teruel; Carvalho, Gladyston Rodrigues

doi:10.1590/1984-70332020v20n1n16

Acessibilidade / Reportar erro

Brasil

Crop Breeding and Applied Biotechnology

Español English

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

NOTE • Crop Breed. Appl. Biotechnol. 20 (1) • Jan-Mar 2020 • https://doi.org/10.1590/1984-70332020v20n1n16 copy

Genetic determination of characteristics related to semi-mechanized coffee harvests

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

Brazilian coffee cultivation was boosted over the last few decades by the mechanization of various field operations. Considering the influence of genetic factors on coffee harvesting efficiency, we aimed to evaluate the use of mechanized harvesting characteristics as a criterion to select progenies derived from ‘Icatu’ germplasm, previously evaluated for agronomic characteristics, resistance to rust and cercosporiosis. We also investigated genotypic and phenotypic correlations between semi-mechanized harvesting characteristics. Ten progenies of Coffea arabica L. were analyzed in two experimental farms during two consecutive harvests. Genetic parameters were evaluated to trace selection strategies. Four progenies that were suitable for mechanization were selected, supporting our hypothesis of the use of harvest characteristics as selection criteria.

Keywords:
Coffea arabica; genetic improvement; BLUP; correlations.

Traits	YIE	NFD	DF	VV	EH	DFR	DFG
YIE	1	0.73	-0.04	-0.19	-0.19	-0.13	-0.08
NFD		1	0.70^**	0.01	-0.13	-0.25	-0.12
DF			1	0.70^**	-0.08	-0.17	-0.16
VV				1	0.01	-0.10	-0.16
EH					1	-0.72^**	-0.09
DFR						1	0.66^**
DFG							1

Parameter¹	EH	NFD	VV	DFR	DFG	DF	YIE
$σ_{g}^{2}$	1.03*	2.38*	0.07*	0.22*	0.10*	0.00	0.28
$c_{p e r}^{2}$	0.06	0.00	0.01	0.00	0.70	0.12	0.00
$c_{i n t}^{2}$	0.07	0.07	0.11	0.00	0.00	0.13	0.19
$h_{m g}^{2}$	0.40	0.59	0.34	0.89	0.56	0.03	0.01
$r g_{e n v}$	0.45	0.17	0.33	0.99	0.75	0.03	0.00
Mean	94.74	8.47	6.80	3.66	6.58	0.44	39.01
Progenies	u + g	u + g	u + g	u + g	u + g
G	95.26	8.10	6.66	4.23	6.45
H	95.20	6.81	6.62	4.16	6.84
J	95.13	7.62	7.00	3.63	6.45
F	95.05	10.41	6.53	3.83	6.38
SG (%)	0.18	-1.67	-0.50	7.30	-0.42

Crop Breeding and Applied Biotechnology Universidade Federal de Viçosa, Departamento de Fitotecnia, 36570-000 Viçosa - Minas Gerais/Brasil, Tel.: (55 31)3899-2611, Fax: (55 31)3899-2611 - Viçosa - MG - Brazil
E-mail: cbab@ufv.br

Acompanhe os números deste periódico no seu leitor de RSS

[1] *E-mail: julianacosta@epamig.br