Seleksi dan indeks sensitivitas cekaman kekeringan galur-galur padi sawah tadah hujan

Cekaman kekeringan hampir terjadi setiap tahun pada sawah tadah hujan. Salah satu teknologi untuk mengatasinya adalah dengan penanaman padi toleran kekeringan. Perakitan varietas toleran kekeringan terus dilakukan dengan mengevaluasi galur-galur yang ditujukan untuk stress kekeringan. Penelitian ini bertujuan untuk menyeleksi, mengevaluasi penurunan hasil, dan mengetahui indeks sensitivitas cekaman kekeringan pada galur-galur tadah hujan hasil seleksi generasi lanjut. Percobaan seleksi cekaman kekeringan dilakukan pada Maret – November 2016 dengan materi genetik sebanyak 135 galur dan Cek Mekongga yang ditanam pada kondisi stress kekeringan (61-72 centibar/Kpa) dan evaluasi galur – galur terseleksi dilakukan pada Februari – Juli 2017 dengan menggunakan rancangan acak kelompok 3 ulangan. Hasil kegiatan seleksi memperoleh sebanyak 19 galur terbaik memiliki toleransi terhadap stres kekeringan untuk dilanjutkan pada kegiatan evaluasi lebih lanjut di kondisi sawah tadah hujan kondisi optimum. Hasil penelitian evaluasi 19 galur menunjukkan sebanyak 4 galur toleran yaitu BP17586-2-0-JK-3-IND-2-SKI-10-PWK-1-SKI-2 (ISK 0.49), BP18354-1-2-JK-3-IND-1-SKI-3-PWK-1-SKI-1 (ISK 0.49), BP18360-2-3-JK-1-IND-1-SKI-7-PWK-2SKI-1 (ISK 0.16), dan BP18406c-JK-1-IND-0-SKI-3-PWK-2-SKI-1 (ISK 0.1). Galur BP18354-1-2-JK-3-IND-1-SKI-3-PWK-1-SKI-1 (Y = 4,77 ton ha-1) adalah galur terbaik yang memiliki potensi hasil tinggi lebih baik dari cek Inpari 38 Tadah Hujan dan memiliki toleransi terhadap cekaman kekeringan. Galur ini potensial untuk diuji lebih lanjut dan dikembangkan di sawah tadah hujan. ABSTRACTDrought stress almost occurs every year in rainfed rice fields. One of the technologies to overcome is by planting drought tolerant varieties rice. Therefore, the assembly of drought tolerant varieties is carried out continuously by evaluating lines intended for drought stress. This study aimed to select, evaluate the decline in yield, and determine the drought tolerance index of rainfed lines resulting from advanced generation selection. Study-1 of drought stress selection experiment was carried out in WS 1 2016 (March – November) with 135 genetic lines and Mekongga as susceptible checks and Inpari 38 as resistant check planted in drought stress conditions (61-72 centibar / Kpa), and study-2 was an evaluation of selected strains carried out in WS 1 2017 (February – July) with 19 selected lines and 3 checks (Mekongga and Ciherang as susceptible check and Inpari 38 as resistant checks) by using a randomized block design with 3 replications. The results of the selection activities (Study-1) obtained as many as 19 of the best lines which had tolerance to drought stress and these lines were continued in further evaluation activities in rainfed lowland with optimum conditions (Study-2). The results showed that 4 of 19 lines were tolerant namely BP17586-2-0-JK-3-IND-2-SKI-10-PWK-1-SKI-2 (DSI - drought stress sensitivity index = 0.49), BP18354-1 -2-JK-3-IND-1-SKI-3-PWK-1-SKI-1 (DSI 0.49), BP18360-2-3-JK-1-IND-1-SKI-7-PWK-2SKI-1 (DSI 0.16), and BP18406c-JK-1-IND-0-SKI-3-PWK-2-SKI-1 (DSI 0.1). The BP18354-1-2-JK-3-IND-1-SKI-3-PWK-1-SKI-1 (Y = 4.77 tons ha-1) line was the best strain that had the potential for high yield better than the Inpari 38 Rainfed Check and had tolerance to stress. This strain has the potential to be further tested and developed in rain-fed rice fields.

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Growth and yield of new hybrid rice in irrigated and rain-fed lowlands

Highlights in BioScience ◽

10.36462/h.biosci.20217 ◽

2020 ◽

Author(s):

La Ode Afa ◽

Bambang S. Purwoko ◽

A. Junaedi ◽

Oteng Haridjaja ◽

Iswari S. Dewi

Keyword(s):

Hybrid Rice ◽

Block Design ◽

Growth And Yield ◽

Yield Potential ◽

High Yield ◽

Severe Drought ◽

Early Maturity ◽

Drought Tolerant ◽

Randomized Block Design ◽

Rice Genotypes

Two experiments were conducted at (i) irrigated lowland, village of Bojong, Cikembar, Sukabumi Sub-district, Indonesia, from November 2011 to February 2012, and (ii) rain-fed lowland, village of Sanca, Gantar sub-district, Indramayu, Indonesia, from April to July 2012. The objective of the experiment was to determine the yield of drought-tolerant hybrid rice genotypes. A randomized block design with three replications was used. The treatment consisted of 8 hybrid rice genotypes (BI485A/BP3, BI485A/BP5, BI485A/BP10, BI485A/BP12, BI485A/BP15, BI599A/BP5, BI599A/BP15 and BI665A/BP6) and 2 check varieties (Hipa 7 and Ciherang) for the experiment in irrigated lowland, 4 hybrid genotypes (BI485A/BP3, BI485A/BP12, BI485A/BP15 and BI599A/BP15) and 3 check varieties (Hipa 7, IR64 and Limboto) for the experiment in rain-fed lowland. On irrigated lowland, all tested-genotypes produced grain yield per hectare, which was not significantly different from the check varieties Ciherang and HIPA 7. The yield of genotype BI485A/BP12, BI485A/BP15 and BI559A/BP15 under irrigated lowland showed non-significant different with check varieties Ciherang and Hipa 7, i.e 5.63, 6.87, and 6.30 tons ha-1, respectively. Genotype BI599A/BP15 under severe drought rain-fed lowland yielded 0.90 tons of grain ha-1, whereas Hipa 7 (hybrid variety, suitable for rain-fed lowland) and Limboto (drought-tolerant check variety) reached 0.34 and 0.29 tons ha-1, respectively. Genotype BI599A/BP15 is a new hybrid genotype that potential for advanced development in rain-fed lowland and in irrigated lowland with a high yield potential and quiet early-maturity age.

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AGRONOMIC CHARACTERS OF DROUGHT-TOLERANT SOYBEANS AT THE REPRODUCTIVE STAGE

BERITA BIOLOGI ◽

10.14203/beritabiologi.v18i3.3365 ◽

2019 ◽

Vol 18 (3) ◽

Author(s):

M. Muchlish Adie ◽

Ayda Krisnawati

Keyword(s):

Drought Stress ◽

Block Design ◽

Growth Period ◽

Dry Season ◽

Reproductive Stage ◽

High Yield ◽

Yield Reduction ◽

Agronomic Characters ◽

Drought Tolerant ◽

Soybean Genotypes

In Indonesia, soybeans are typically cultivated during the dry season, thus making it prone to drought stress in the reproductive stage. The objective of the research was to characterize the agronomic characters of several soybean genotypes which were tolerant to drought at the reproductive stage. A total of 19 soybean genotypes were evaluated for its agronomic characters and tolerance to drought stress in Probolinggo (East Java, Indonesia) during the dry season (June – September). The research was arranged in a randomized block design with four replicates. Soybean cultivars were sown at two separate experiments, normal/optimal (plants were irrigated during the growth period) and stress (plants were irrigated up to 40 days after planting) conditions. Drought stress during the reproductive stage did not affect the characters of plant height, the number of branches per plant, the number of nodes per plant, and the number of pods per plant. Meanwhile, the number of empty pod, seed weight per plant, and seed yield were significantly affected. There were two genotypes which were identified as the tolerant genotypes to drought stress at the reproductive stage, i.e. MDT15-6-11 and MDT15-W-3034. The agronomic characters of MDT15-6-11 were showed as having a low percentage of yield reduction, hence it was able to mantain its high yield. The MDT15-W-3034 was identified as drought-tolerant due to the slow wilting, high plant character, a slow vegetative phase, and high yields. The genotypes obtained from this study could be recommended to be released as new soybean drought-tolerant varieties due to its high yield and tolerant to drought stress. Those genotypes could also be used as gene donors for soybean improvement to drought stress at the reproductive stage.

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Estimation of Heritability of Several Genotype of Soil (Arachis Hypogaea L.) and Tolerance Test of Shade and Drought Stress

International Journal of Multicultural and Multireligious Understanding ◽

10.18415/ijmmu.v8i5.2517 ◽

2021 ◽

Vol 8 (5) ◽

pp. 1

Author(s):

Marsinah Marsinah ◽

A. Farid Hemon ◽

Lestari Ujianto

Keyword(s):

Drought Stress ◽

Block Design ◽

Dry Weight ◽

Tolerance Test ◽

Second Phase ◽

Drought Tolerant ◽

Randomized Block Design ◽

Arachis Hypogaea L ◽

Heritability Estimation ◽

Significant Difference

This study aims to determine the heritability estimation of several peanut genotypes and to test tolerance to shade and drought stress. The research was carried out in 3 stages, the first stage from May to July 2019 in Sigerongan village, Lingsar District, West Lombok Regency, the second phase from August to October 2019 in Sigerongan village, Lingsar District, West Lombok Regency, and the third stage from July to September 2020 in Nyiurlembang village, Narmada District, West Lombok Regency, West Nusa Tenggara. The experimental design used in estimating heritability was a randomized block design (RAK) consisting of 20 peanut genotypes, namely G2T5, G3D6, G2D2, G5-UII, G300-II, G2T3, G11-UI, G3T4, G200-I, and G12. -UI, G2T1, G2D7, G3T10, G3D8, G7-UII, G7-UIII, G3T7, G16-UI, G7-UI and G2D3. Tolerance test of peanut genotypes to shade and drought stress used a Randomized Block Design (RBD) with a Split Plot Design. The results showed that the genetic diversity value of peanut genotypes against the tested parameters showed that all peanut genotypes were ineffective for further tests on the parameters of plant height, number of leaves and number of branches, while the parameters of the number of filled pods and dry weight of pods all genotypes showed moderate criteria which means that it is effective for further selection. Shade treatment was more influential than treatment without shade. The parameters of pod dry weight and number of filled pods showed a significant difference between the two. Genotypes sensitive to shade stress are G2T5, G3D6, G2T3, G200-I, G2T1, G2D7, G3D8, G7-UII, TAKAR, G3T7, mildly tolerant genotypes, namely G2D2, G5-UII, G300-II, G11-UI, G3T4, G12-UI, G3T10, G7-UI, and G2D3 and the shade tolerant is G16-UI. Plant genotypes that were sensitive (P) to drought stress were G2T5, G3D6, G2D2, G5-UII, G2T3, G11-UI, and G3T4. And the genotypes that are somewhat tolerant are G200-I and G12-UI. Meanwhile, the drought tolerant genotype was G300-II.

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Study of Drought Tolerance of Some Durum Wheat (Triticum durum Desf.) Genotypes Growing under Semi-arid Conditions in Algeria

International Journal of Bio-resource and Stress Management ◽

10.23910/1.2021.2171a ◽

2021 ◽

Vol 12 (2) ◽

pp. 137-141

Author(s):

Benalia Frih ◽

◽

Abdelmalek Oulmi ◽

Ali Guendouz ◽

◽

...

Keyword(s):

Water Stress ◽

Drought Stress ◽

Stress State ◽

Stress Tolerance ◽

High Performance ◽

Geometric Mean ◽

Stability Index ◽

Stress Sensitivity ◽

High Yield ◽

Tolerance Index

The aim of this study was to test the behavior of 5 genotypes cultivated in normal and irrigated conditions with regard to drought stress. We used seven indices of tolerance and resistance to drought stress. Analyze of variance showed that the geometric mean productivity, mean productivity, stress tolerance index, yield stability index, stress sensitivity tolerance and tolerance intensity were effective in judging tolerance to water stress, Boussellem and Oum Rabie was the best at water stress resistance genotypes. Correlation analysis showed that GMP is both an indicator of high performance under both conditions and of resistance to stress (r=0.56* in a stress state and r=0.82*** in a non-stress state) . Boussellem and Oum Rabie were the strongest in yield and the most adapted to water stress thanks to their values for this index (8.84 and 9.06 respectively). SSI testified to the high yield in non-stress condition (r=0.82***), therefore Ofanto was a good cultivar in non-stess condition. PCA classified the genotypes Bousselem and Oum Rabie on the first component which combined the performance in yield under both conditions with the mean productivity, geometric mean productivity, and stress tolerance index. In conclusion, the Oum Rabie and Bousselem genotypes were the best performing under both conditions and the best adapted to drought stress, while Ofanto was a good cultivar in non-stress conditions. MP, GMP and STI indices was the best to judge the adaptability of our genotypes to drought stress.

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Evaluation of Some Sugar Beet Genotypes Under Drought Stress Based on Selection Indices

Journal of Agronomy Research ◽

10.14302/issn.2639-3166.jar-18-2083 ◽

2018 ◽

Vol 1 (1) ◽

pp. 34-48 ◽

Cited By ~ 1

Author(s):

Salah A. Okasha ◽

Mohamed H. Mubarak

Keyword(s):

Water Stress ◽

Drought Stress ◽

Sugar Beet ◽

Stress Tolerance ◽

Drought Index ◽

Block Design ◽

Geometric Mean ◽

P Value ◽

Tolerance Index ◽

Sensitivity Index

This study was conducted to determine drought tolerant indices of some sugar beet genotypes under water stress and non-stress conditions. Nine sugar beet (Beta Vulgaris L.) genotypes were tested in a Split-plot experiment based on a randomized complete block design in three replications under three levels of water stress 100%, 75% and 50% from plant requirements at the experimental farm Faculty of Agriculture, Suez Canal University, Ismailia, Egypt during 2015/ 2016 and 2016 / 2017 seasons. Twelve drought tolerance indices were used in this study, stress sensitivity index (SSI), stress tolerance (TOL), mean productivity (MP), geometric mean (GMP), harmonic mean (HM),yield stability index (YSI), yield index (YI), stress tolerance index (STI), sensitivity drought index (SDI), relative drought index (RDI), drought response index (DI) and stress susceptibility percentage index (SSPI). GMP, MP and STI were more informative towards classification of better or superior genotypes with respect to tolerant and sensitive groups. The results showed that the genotypes with high STI, GMP and MP values were suitable for cultivation under drought stress and non-stress environments. Both Yp and Ys of root yield in the control-50% analysis had significantly positive correlated (P value<0.05) with MP, GMP, YI, HM and DI, This indicates that these indices were more effective in identifying high yielding genotypes under drought stress as well as non-stress conditions.Principal components analysis showed that the first two components in the control-50% analysis, genotype Bts 1237 and Temar were identified as the most stable high yielding genotypes in both environments

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Can Sustained Deficit Irrigation Save Water and Meet the Quality Characteristics of Mango?

Agriculture ◽

10.3390/agriculture11050448 ◽

2021 ◽

Vol 11 (5) ◽

pp. 448

Author(s):

Leontina Lipan ◽

Aarón A. Carbonell-Pedro ◽

Belén Cárceles Rodríguez ◽

Víctor Hugo Durán-Zuazo ◽

Dionisio Franco Tarifa ◽

...

Keyword(s):

Irrigation Water ◽

Deficit Irrigation ◽

Block Design ◽

Water Productivity ◽

Titratable Acidity ◽

Soluble Solids ◽

Total Phenolic ◽

Drought Tolerant ◽

Randomized Block Design ◽

Peel Color

Mango is one of the most cultivated tropical fruits worldwide and one of few drought-tolerant plants. Thus, in this study the effect of a sustained deficit irrigation (SDI) strategy on mango yield and quality was assessed with the aim of reducing irrigation water in mango crop. A randomized block design with four treatments was developed: (i) full irrigation (FI), assuring the crop’s water needs, and three levels of SDI receiving 75%, 50%, and 33% of irrigation water (SDI75, SDI50, and SDI33). Yield, morphology, color, titratable acidity (TA), total soluble solids (TSS), organic acids (OA), sugars, minerals, fiber, antioxidant activity (AA), and total phenolic content (TPC) were analyzed. The yield was reduced in SDI conditions (8%, 11%, and 20% for SDI75, SDI50, and SDI33, respectively), but the irrigation water productivity was higher in all SDI regimes. SDI significantly reduced the mango size, with SDI33 generating the smallest mangoes. Peel color significantly changed after 13 days of ripening, with SDI75 being the least ripe. The TA, AA, and citric acid were higher in SDI75, while the TPC and fiber increased in all SDI levels. Consequently, SDI reduced the mango size but increased the functionality of samples, without a severe detrimental effect on the yield.

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Evaluation of Short Duration Drought Tolerant Rice Varieties in Drought Prone Areas of Subarnapur District of Odisha

International Journal of Plant & Soil Science ◽

10.9734/ijpss/2020/v32i830314 ◽

2020 ◽

pp. 21-26

Author(s):

S. Pradhan ◽

F. H. Rahman ◽

S. Sethy ◽

G. Pradhan ◽

J. Sen

Keyword(s):

Short Duration ◽

Upland Rice ◽

Plant Protection ◽

Block Design ◽

Rice Variety ◽

Rice Varieties ◽

Agronomic Practices ◽

Drought Tolerant ◽

Randomized Block Design ◽

Sowing Seed

A study was conducted in farmer’s field through technology demonstrations during Kharif season of 2018 and 2019 in Subarnapur district of Odisha to recommend the most suited short duration drought tolerant upland rice variety particular to the locality. Six different varieties like Sahabhagi dhan, Mandakini, Jogesh, DRR-44, and DRR-42 & Khandagiri were taken with four replications in Randomized Block Design in both years. Technology demonstration included not only the improved short duration varieties, but also a package of good agronomic practices viz. line sowing, seed treatment with Bavistin, proper fertilization with dose @ 80:40:40 NPK/ha, pre emergence herbicide application with pretilachlor, needful manual weeding and need based plant protection chemicals. The results of demonstration showed that farmers could increase rice productivity notably by adopting improved variety Sahabhagi dhan and DRR-44. These varieties recorded higher grain yields of 64% and 46%, respectively, and fetched a sum return of Rs 25620 and Rs 25275 over farmers’ local variety Khandagiri.

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Pembentukan Core Collection untuk Sumber Daya Genetik Padi Toleran Kekeringan

Buletin Plasma Nutfah ◽

10.21082/blpn.v17n2.2011.p104-115 ◽

2016 ◽

Vol 17 (2) ◽

pp. 104

Author(s):

Tiur S. Silitonga ◽

Andari Risliawati

Keyword(s):

Core Collection ◽

Upland Rice ◽

Block Design ◽

Yield Potential ◽

Plant Spacing ◽

Plot Size ◽

Central Java ◽

Drought Tolerant ◽

Randomized Block Design ◽

Rice Genetic

The Development of Core Collection for Rice Genetic Resources Tolerant to Drought. The experiment was conducted in dry season, July-September 2009 at the research farm in Jakenan, Central Java and planted in randomized block design (RBD) arrangement by using 150 accessions with the plot size of 5 m x 1 m, with plant spacing 25 cm x 20 cm and three replications. Another experiment used as control and grown as upland rice without drought stresses by watering twice in a week was planted in RBD arrangement with two replications, plot size 5 m x 1 m and spacing 25 cm x 20 cm. The results showed that 26 varieties were selected for sub core collection for drought tolerance. Jatiluhur and B.9645-E-Mr-89 had the highest yield potential respectively 3,88 dan 3,77 t/h. All of the varieties with tolerant to drought were selected for core collection. This would be very important as they could be directly grown by farmers as tolerant varieties or used as sources of gene in the breeding program to improve varieties for drought tolerant with high yielding potential. AbstrakPembentukan core collection untuk sumber daya genetik padi toleran kekeringan. Penelitian dilaksanakan pada musim kemarau, Juli-September 2009 di Kebun Penelitian Balai Penelitian Lingkungan Pertanian Jakenan, Jawa Tengah, dengan rancangan acak kelompok, tiga ulangan, menggunakan 150 aksesi yang ditanam pada petak berukuran 5 m x 1 m. Tanaman disiram setiap tiga hari sekali sampai tumbuh baik dan setelah berumur 25 hari tanaman mulai dikeringkan. Sebagai petak pembanding adalah tanaman padi gogo biasa yang disiram setiap dua seminggu sekali sampai panen. Pertanaman pembanding ditanam dengan jarak 25 cm x 20 cm. Dari penelitian ini terpilih 26 varietas toleran kekeringan dengan skor 1-5. Di antara aksesi ini terdapat varietas yang berumur genjah dan sedang (115-135 hari), sehingga waktu panennya agak berbeda. Varietas Jatiluhur dan galur B.9645- E-Mr-89 mempunyai potensi hasil paling tinggi, masingmasing 3,88 dan 3,77 t/ha dan toleran terhadap kekeringan. Aksesi yang toleran terhadap kekeringan terutama yang mempunyai potensi hasil tinggi, dapat langsung digunakan oleh petani atau sebagai sumber gen dalam perakitan varietas unggul toleran kekeringan dan berpotensi hasil tinggi.

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Effectiveness Test of Parasitization by Parasitoid Tricogramma japonicum in Controlling White Rice Stem Borer (Scirphopaga innotata)

International Journal on Food, Agriculture and Natural Resources ◽

10.46676/ij-fanres.v2i1.26 ◽

2021 ◽

Vol 2 (1) ◽

pp. 25-30

Author(s):

Susilawati Astrodjojo ◽

Suratman Sudjud ◽

Sri Soenarsih DAS

Keyword(s):

Block Design ◽

Stem Borer ◽

Plant Age ◽

High Yield ◽

Intensity Parameter ◽

Factor B ◽

White Rice ◽

Rice Stem Borer ◽

Randomized Block Design ◽

Essential Food

Rice is an essential food crop besides corn and soybeans. The need for rice each year increases along with population growth. One of the pests affecting rice is the white rice stem borer. The present research aimed to test the effectiveness and to examine the interaction between plant age and the number of Tricogramma japonicum parasitoid. The research was carried out at the Agrotechnology Laboratory of the Faculty of Agriculture, Khairun University, Ternate, and the rice fields of Bumi Restu village SP I, East Wasile district. The research design operative was a randomized block design where factor A (A1 = 21 DAS, A2 = 42 DAS, A3 = 56 DAS) was the age of the plant, and factor B (B0 = 0, B1 = 50, B2 = 100, B3 = 150) was the number of eggs of Corcyra cephalonica. Biological control using different amounts of Trichogramma japonicum parasitoid led to different interactions and results for each tested parameter. For the number of egg groups, there was no interaction with plant age, but the treatments which were found effective in suppressing stem borer populations were B2 and B3 (100 and 150). The most effective pias as indicated by damage intensity parameter was B3 (150), which was applied to plants aged 21 DAP. Furthermore, for plant height, different number of parasitoids poses significantly effective results. Percentage unhulled grain of pias B3 (150) causes insignificant damage. For production there is no interaction with plant age, but pias B2 (100) shows high yield. The conclusion is that pias B3 (150) applied to 21 days of plants is very effective in controlling white rice stem borer.

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Yield and technological performance of sugarcane cultivars grown under Af climate conditions

Semina Ciências Agrárias ◽

10.5433/1679-0359.2020v41n1p73 ◽

2020 ◽

Vol 41 (1) ◽

pp. 73

Author(s):

Augusto Sousa Miranda ◽

Felipe Nogueira Domingues ◽

Bruno Spacek Godoy ◽

Aníbal Coutinho do Rêgo ◽

Cristian Faturi ◽

...

Keyword(s):

Reducing Sugars ◽

Agronomic Traits ◽

Block Design ◽

High Yield ◽

Technological Parameters ◽

Climate Conditions ◽

Sugarcane Crop ◽

Randomized Block Design ◽

Four Blocks ◽

Almost All

Sugarcane crops are grown in almost all regions of Brazil, in various types of soil and under the influence of different climate conditions, which results in diverse production environments as climate factors directly influence the yield and technological quality of a sugarcane crop. The present study evaluated the agronomic and technological characteristics of sugarcane cultivars grown in Af climate conditions. The agronomic traits (natural matter production and the number, length, and diameter of stalks) and technological attributes (Brix, purity, Pol, reducing sugars, total reducing sugars, moisture, and fiber content) of three sugarcane cultivars, IACSP93-6006, RB83-5486, and SP79-1011, were determined in a three-year experiment with a randomized block design using four blocks and two repetitions per block. The cultivars IACSP93-6006 and SP79-1011 exhibited superior agronomic traits compared to RB83-5486, showing better adaptation to the soil and climate conditions of the study area. However, the technological attributes, which were below the minimum standard levels required by the sugar and ethanol industry, were not statistically different among the studied cultivars. The abundant rainfall and high temperatures, characteristics of an Af climate, were not favorable for sucrose accumulation in the IACSP93-6006, RB83-5486, and SP79-1011 cultivars. Therefore, despite the high yield, sugarcane intended for industrial purposes should not be grown under Af climate conditions, owing to the insufficient technological parameters.

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