DROUGHT TOLERANCE IN INTERVARIETAL MAIZE HYBRIDS

ROCHA, DANIEL SARTO; RODRIGUES, CINTHIA SOUZA; GALLO, PAULO BOLLER; TICELLI, MARCELO; PATERNIANI, MARIA ELISA AYRES GUIDETTI ZAGATTO

doi:10.1590/1983-21252021v34n109rc

Acessibilidade / Reportar erro

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

Agronomy • Rev. Caatinga 34 (1) • Jan-Mar 2021 • https://doi.org/10.1590/1983-21252021v34n109rc copy

DROUGHT TOLERANCE IN INTERVARIETAL MAIZE HYBRIDS

TOLERÂNCIA AO DÉFICIT HÍDRICO EM HÍBRIDOS INTERVARIETAIS DE MILHO

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

In the period of planting of second-season maize, there is high climatic instability with greater probability of occurrence of water deficit. This is one of the factors that most cause reduction in maize grain yield. In this context, the aim was to identify stable, irrigation-responsive and drought-tolerant maize genotypes. The experiments were conducted in Mococa / SP and Tatuí / SP, at Instituto Agronômico, in two assays, one under full irrigation conditions and the other under water stress. The experimental design was randomized blocks with 3 replicates. Male flowering, female flowering, plant height, ear height, hectoliter weight, one hundred grain weight and grain yield were evaluated. Joint analysis of variance and stability analysis were performed by the GGEBiplot method. Significant genotype and site effects were observed for all traits. Significant effects of genotype x site interaction were found for all traits except ear height and male flowering. The characteristics most affected by water deficit were male flowering, plant and ear heights and grain yield. Genotypes F₂ BM709 x PopTol 2, IAC 46 x PopTol 2, F₂ 30K75 x PopTol 3 and F2 BM709 x PopTol 3 are considered ideotypes because of their high grain yield, phenotypic plasticity and drought tolerance.

Keyword:
Water deficit; GGE Biplot; Genotype x environment interaction

			Characteristics of the commercial hybrid
Genotypes	Denomination	Origin	Type	Grain Type	Grain Color	Cycle
Group 1
F₂ AG8088	P1	Monsanto	SH	Hard	Orangish	Early
F₂ AG8060	P2	Monsanto	SH	Hard	Orangish	Early
F₂ 30F90	P3	Pioneer	SH	Hard	Yellow	Early
F₂ 30F53	P4	Pioneer	SH	Semi-hard	Orangish	Early
F₂ DKB350	P5	Monsanto	TH	Hard	Orangish	Early
F₂ 30K75	P6	Pioneer	mSH	Semi-hard	Orangish	Semi-early
F₂ 30S31	P7	Pioneer	SH	Semi-hard	Orangish	Semi-early
F₂ BM709	P8	Biomatrix	SH	Semi-dent	Reddish	Semi-early
IAC 46	P9	IAC	SH	Semi-dent	Orangish	Early
AL Bandeirantes	P10	CATI	V	Semi-hard	Yellow Orangish	Semi-early
F₂ DKB390	P11	Monsanto	SH	Hard	Yellow Orangish	Early
F₂ Maximus	P12	Syngenta	SH	Hard	Orangish	Early
F₂ FT510	P13	FT	SH	Hard	Orangish	Early
Group 2
Population Tolerant 2	T1	IAC	Pop	Semi-dent	Orangish	Early
Population Tolerant 3	T2	JMen	Pop	Semi-hard	Orangish	Early

SV	DF	MS
SV	DF	GY	PH	EH	MF	FF	HGW	HW
Block/S/WC	7	4300.000**	0.200	0.021	7.001	13.000**	47.002	4.200**
Site (S)	1	470000.000**	39.200	12.853**	8305.000**	6854.000**	3086.001*	33.600**
Water Cond. (WC)	1	165000.000**	10.500**	2.421**	430.000**	845.000**	68.000**	0.101^ns
Genotypes (G)	43	18200.000**	0.200**	0.122**	14.000	9.001*	76.000	15.600**
S x WC	1	46700.000**	5.800**	3.554**	398.002**	781.003**	114.000	55.300**
S x G	43	2970.000**	0.019**	0.010^ns	3.001^ns	3.000*	11.000	3.400**
WC x G	43	732.000^ns	0.007^ns	0.010^ns	3.002^ns	1.000^ns	9.000*	1.000^ns
S x WC x G	43	600.000^ns	0.012*	0.011^ns	5.001**	2.000^ns	7.001^ns	0.900^ns
Residual	301	617.000	0.009	0.010	2.000	2.001	6.000	1.100
CV%		15.9	4.1	6.5	2.1	1.8	7.2	1.4

Universidade Federal Rural do Semi-Árido Avenida Francisco Mota, número 572, Bairro Presidente Costa e Silva, Cep: 5962-5900, Telefone: 55 (84) 3317-8297 - Mossoró - RN - Brazil
E-mail: caatinga@ufersa.edu.br

Acompanhe os números deste periódico no seu leitor de RSS

[1] *Corresponding author