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Crop Breeding and Applied Biotechnology

Print version ISSN 1518-7853On-line version ISSN 1984-7033

Crop Breed. Appl. Biotechnol. vol.19 no.3 Viçosa July/Sept. 2019  Epub Oct 31, 2019 


INT7100 IPRO - A soybean cultivar for an extensive growing area in the South and Cerrado in Brazil

Tamiris Pereira da Silva1  *

Júlio César DoVale1 

Lucas Silvério2 

Jean Newton Marques3 

Reginaldo Rosa3 

Luan Henrique Guarido da Silva3 

Lucas Willwock3 

Sâmia Teodoro3 

Jaqueline Bueno da Silva4 

1Universidade Federal do Ceará, Departamento de Fitotecnia, Av. Mister Hull, 2977, Campus do Pici, 60.356-000, Fortaleza, CE, Brazil.

2Centro Universitário Integrado, 87.300-970, Campo Mourão, PR, Brazil

3INT Sementes de Soja, 87.300-970, Campo Mourão, PR, Brazil

4Universidade Estadual de Maringá, Departamento de Genética e Melhoramento, Campus Universitário, 87.020-900, Maringá, PR, Brazil


Soybean cultivars with "plasticity" traits, such as good branching ability, ensure compensation of gaps in planting. The cultivar INT7100 IPRO provides excellent branching ability and plant architecture, facilitating control of pests and diseases, and it contains the biotechnology INTACTA RR2 PRO®. It is resistant to stem canker, brown stem rot, and bacterial blight.

Keywords: Glycine max; branching; early maturity; disease resistance; glyphosate tolerance


Soybean (Glycine max L. Merrill) growing is one of the agricultural activities that has most increased worldwide in recent decades. Brazil has had a prominent position in this expansion, and the area planted to soybean represents approximately 57% of the area dedicated to grain cultivation in the country. In the 2017/2018 crop season, Brazil produced 119 million tons of soybean, with an average yield of 3394 kg ha-1 (CONAB 2019).

Currently, in choosing a soybean cultivar, producers observe not only yield, but also the following factors: recommended growing region, maturity group, growth type, average crop cycle, plant height, resistance to lodging, sowing season, and reaction to diseases (Sediyama et al. 2015). Other important characteristics are protection against the main leaf-eating caterpillars and tolerance to glyphosate herbicide, which is currently conferred through insertion of the INTACTA RR2 PRO® biotechnology (Uarrota et al. 2019).

The development of early-maturity soybean cultivars is the main objective of the soybean breeding program developed by the Centro Universitário Integrado of Campo Mourão, PR, Brazil, to allow the producer to take advantage of a second crop season. The cultivar developed must not only have early maturity, but also good yield potential, which is a characteristic of the cultivar INT7100 IPRO, since its excellent branching allows it to maintain the number of pods and grains per square meter even with gaps in planting.


The soybean cultivar INT7100 IPRO was derived from crossbreeding the elite inbred lines INT19372 and INT19360 in the Genetic Improvement Program of the Centro Universitário Integrado (CEI) in Campo Mourão, Paraná, Brazil. After obtaining the F1 seeds, the segregating generations proceeded by the SPD (Single Pod Descent) method. The cross that generated the cultivar registered as INT7100 IPRO was called 14/MO60.23 until the end of selection and harvest of the progenies at the experimental station in the 2013/2014 crop season. In the 2014/2015 crop season, it was placed for evaluation in a preliminary test. In the 2015/2016 and 2016/2017 crop seasons, value for cultivation and use (VCU) experiments were performed, following the requirements of the Brazilian Ministry of Agriculture (MAPA), in diverse soil and climatic conditions in soybean macro-regions 1, 2, and 3, in order to expand recommendation of the cultivar for wider and more diverse environments. Genetic seed production started in 2017.


Experiments were conducted in the 2015/2016, 2016/2017, and 2017/2018 crop seasons, for a total of 21 environments in the states of Paraná, Goiás, and Mato Grosso do Sul, which were evaluated according to MAPA criteria (Table 1). These environments represent different edaphic and climatic regions and soybean macro-regions. Thus, for each location, a planting density was used that, together with good management, allows the cultivar under testing to obtain good yield from its architectural, branching, and early maturity characteristics (Table 2). After analysis of the data and confirmation of superior performance of INT7100 IPRO compared to the commercial controls recommended for each location, the cultivar was registered for growing.

Table 1 Municipalities of the experimental trials (LOCATION), state (STATE), soybean macro-region (MR), edaphic and climatic region (ECR), and ideal sowing density (DENSITY) for cultivating INT7100 IPRO 

Location State MR ECR DENSITY
Guarapuava PR 1 103 12
Campo Mourão PR 2 201 14
Floresta PR 2 201 16
Luiziana PR 2 201 12
Maracajú PR 2 202 16
Rio Verde GO 3 301 18
Cristalina GO 3 301 14

Table 2 Mean yield (MY) and relative yield (RY) of cultivar INT7100 IPRO compared to commercial controls in the 2015/2016, 2016/2017, and 2017/2018 crop seasons in the state of Paraná, Goias, and Mato Grosso do Sul 

Location Cultivar 15/16 16/17 17/18 MY (kg ha-1) RY (%)
Guarapuava/PR M6210IPRO 3078 4784 3568 3810 100
DM 6563RSF IPRO 3344 5175 3580 4033 106
INT7100 IPRO 3629 4837 4425 4297 113
Campo Mourão/PR M6210IPRO 3662 4034 4744 4147 125
DM 6563RSF IPRO 2622 2290 5052 3321 100
INT7100 IPRO 3697 3911 5522 4377 132
Floresta/PR M6210IPRO 2623 5288 4152 4021 106
DM 6563RSF IPRO 2467 5101 3827 3798 100
INT7100 IPRO 3490 5107 3785 4127 109
Luiziana/PR M6210IPRO 4222 5366 4726 4805 109
DM 6563RSF IPRO 4155 4953 4014 4374 100
INT7100 IPRO 4653 5225 4575 4818 110
Maracaju/MS BMX POTÊNCIA RR 3825 4637 5192 4551 100
M6410IPRO 4770 4724 5556 5017 110
INT7100 IPRO 5053 5121 5468 5214 115
Rio Verde/GO BMX POTÊNCIA RR 3187 3661 4016 3621 103
BMX DESAFIO 8473 RSF RR 2779 4125 3682 3529 100
INT7100 IPRO 3411 4457 4087 3985 113
Cristalina/GO BMX POTÊNCIA RR 1637 4142 4195 3325 101
BMX DESAFIO 8473 RSF RR 1733 4218 3881 3277 100
INT7100 IPRO 2220 4333 4175 3576 109

In the yield evaluations, the cultivar INT7100 IPRO obtained a higher average than all the commercial cultivars used as controls, considering the overall average of the three crop seasons (2015/2016, 2016/2017, and 2017/2018) evaluated in each location (Table 2). The superiority of its performance compared to the controls used in each environment ranged from 3% to 32% in relative grain yield. Commercial cultivars with prominent yields for each site were used as checks.

Table 3 Mean yield (MY) and relative yield (RY) of cultivar INT7100 IPRO compared to commercial controls in the 2015/2016, 2016/2017, and 2017/2018 crop seasons in the 4 edaphic and climatic regions (ECR) 

ECR1 Cultivar MY (kg ha-1) RY (%)
103 M6210IPRO 3810 100
DM 6563RSF IPRO 4033 106
INT7100 IPRO 4297 113
103 M6210IPRO 4313 113
DM 6563RSF IPRO 3831 100
INT7100 IPRO 4441 116
202 BMX POTÊNCIA RR 3281 100
BMX DESAFIO 8473 RSF RR 3561 109
INT7100 IPRO 3599 110
301 BMX POTÊNCIA RR 3473 102
BMX DESAFIO 8473 RSF RR 3403 100
INT7100 IPRO 3781 111

Considering the edaphic and climatic regions (ECRs) used, the mean yield of the cultivar INT7100 IPRO was 4297 kg ha-1 for ECR 103, 13% higher than the check M6210 IPRO (3810 kg ha-1) and 7% higher than DM 6563RSF IPRO (4033 kg ha-1). For ECR 201, its mean yield was 4441 kg ha-1, 16% higher than DM 6563RSF IPRO (3831 kg ha-1) and 3% higher than M6210 IPRO (4313 kg ha-1). In ECR 202, its mean yield was 3599 kg ha-1, corresponding to a 10% increase in relative yield compared to BMX POTÊNCIA RR (3281 kg ha-1) and 1% higher than M6410 IPRO (3561 kg ha-1). Finally, in ECR 301, the cultivar INT7100 IPRO had a mean yield of 3781 kg ha-1, 11% higher than BMX DESAFIO 8473 RSF RR (3403 kg ha-1) and 9% higher than BMX POTÊNCIA RR (3473 kg ha-1).

Adaptability and stability assessments were also made with the yield data from the regions tested. The results indicated that the cultivar INT7100 IPRO was not only higher yielding than the highest yielding cultivars on the market, but also had wide adaptability and stability.

The most appropriate season for sowing is from September 20 to October 30 for locations in the South region and from October 1 to November 5 for locations in Goiás and Mato Grosso. The cultivar requires medium to high fertility soils for all indicated regions. It is classified as early maturity and falls within maturation group 6.4, with a cycle from 118 to 125 days.

The INT7100 IPRO soybean cultivar has indeterminate growth habit, excellent yield, yellow seeds of low luster, light brown hilum, purple flowers, and dehiscence resistant pods with gray pubescence and that are light gray, and the 100 seed weight is approximately 16 g. It is resistant to lodging and reaches a height of around 80 to 115 cm in the South and 70 to 95 cm in the regions of Mato Grosso do Sul and Goiás.

It is resistant to reniform nematode (Rotylenchulus reniformis), moderately resistant to root-knot nematode (Meloidogyne incognita), and susceptible to Meloidogyne javanica species and to soybean cyst nematode (Heterodora glycines). It is resistant to stem canker (Diaporthe phaseolorum sp. meridionalis), brown stem rot (Cadophora gregata), and bacterial blight (Pseudomonas syringae pv glycinea). It is moderately resistant to frogeye leaf spot (Cercospora sojina), powdery mildew (Microsphaera diffusa), phytophthora root rot (Phytophthora sojae), and target leaf spot (Corynespora cassiicola) and susceptible to bacterial pustule (Xanthomonas axonopodis pv. glycines).


The cultivar INT7100 IPRO was registered in the Brazilian Ministry of Agriculture (Ministério da Agricultura, Pecuária e Abastecimento - MAPA) on October 23, 2017 under number 37292. The seeds of the cultivar INT7100 IPRO are produced by Agropecuária Ipê, Tec Agro, Unigell Sementes, and Sementes Goiás.


CONAB - Companhia Nacional de Abastecimento (2019) Acompanhamento da safra brasileira: grãos (Nono levantamento). Available at: <Available at: >. Accessed on June 27, 2019. [ Links ]

Uarrota VG, Segatto C, Voytena APL, Maraschin M, Avila LV, Kazama DCS, Coelho CMM and Souza CA (2019) Metabolic fingerprinting of water-stressed soybean cultivars by gas chromatography, near-infrared and UV-visible spectroscopy combined with chemometrics. Journal of Agronomy and Crop Science 205: 141-156. [ Links ]

Sediyama T, Silva F and Borém A (2015) Soja: do plantio a colheita. Editora UFV, Viçosa, 333p [ Links ]

Received: August 09, 2018; Accepted: April 17, 2019

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