Resumo em Inglês:Abstract Eucalyptus plantations in Brazil are expanding toward the northern and mid-western regions of the country. The objective of the present study was to select clones adapted to the local conditions, with a focus on the Cerrado region. Three clonal experiments were conducted in the municipalities of Catalão, Corumbá-de-Goiás, and Luziânia, in Goiás State, with 109 genotypes of eucalypts. The experimental design consisted of a randomized complete block design with single-tree plots and 29 blocks. Diameter at breast height and total height of all trees were measured four years after planting, for use in the estimation of wood volume for each genotype. The genotype × environmental interaction was significant and predominantly (74%) complex. The genotypic correlation among environments was moderate (< 0.47), indicating that clones should be selected for specific sites. However, some clones performed relatively well across all environments, such as clones CCL21, CCL30, AEC144, CCL07, and CCL35.
Resumo em Inglês:Abstract Estimating genetic parameters is an essential procedure to define strategies for breeding and selection of higher yielding genotypes. The use of a selection index can assist in decision making by combining the high yield trait with other desirable traits. The objective of this study was to verify the possibility of gains from selection in a sweet potato population to select potentially promising genotypes. The experiment was conducted in a randomized block design, with three plants per plot and two replications, consisting of 255 sweet potato genotypes and a commercial cultivar (256 treatments). The data were analyzed through REML/BLUP. Genetic gains were evaluated using selection indexes based on the rank sun. The plant population tested showed high genetic variability; 81.25% of the traits had genotypic coefficients of variation above 20%, which indicates conditions favorable to selection with considerable genetic advances. CERAT31-01, CERAT21-02, and CERAT51-30 can be recommended as the most promising genotypes.
Resumo em Inglês:Abstract The present study was performed for the morphological and cytogenetic description of F1 hybrids obtained from a cross between Passiflora coccinea Aubl. and Passiflora hatschbachii Cervi. Hybridization was confirmed by genomic in situ hybridization (GISH). Corona banding was the most relevant floral descriptor for separating the hybrids into two groups, the cultivars P. 'Vivis' and P. 'Jhovi', and the parents and hybrids had diploid chromosome number 2n = 18. The F1 progenies exhibited normal meiotic behavior with normal tetrad production, which guaranteed high pollen viability (>70%) and fertile hybrids. Therefore, P. 'Vivis' and P. 'Jhovi' have the potential to be used for ornamental plants market.
Resumo em Inglês:Abstract Parent selection is a crucial step in breeding programs. In the present study, we evaluated the genetic diversity in tropical wheat genotypes using best linear unbiased predictions (BLUPs) by different grouping methods. We identified potential parents to compose a crossing block with the aim of improving wheat for the Brazilian Cerrado. A total of 41 tropical wheat genotypes were evaluated in a field experiment. The evaluated traits included days to flowering; disease symptoms of fusarium head blight, blast, and leaf rust; flag leaf height; plant height; spike mass; hectoliter weight; and grain yield. The BLUPs were predicted and, from these, the standardized average Euclidean distance was calculated. Then, UPGMA, Tocher, and principal component clusters were generated from this genotypic distance matrix. Evaluating genetic diversity based on BLUP allowed the identification of two groups of highly dissimilar genotypes with high estimated genotypic values with which to compose a partial diallel.
Resumo em Inglês:Abstract Forage plant breeders often use visual scores to assess agronomic traits because of the costs associated with in-depth phenotyping in the initial stages of breeding cycles. The aim of this study was to investigate the impact of the number of graders on the effectiveness of indirect selection of high-yielding genotypes and determine an optimal number of graders in the early-stage trials of Urochloa ruziziensis. For that purpose, five graders assessed 2.219 U. ruziziensis genotypes in an augmented block design. Biomass production and vigor scores were evaluated in two cuts and were analyzed using a linear mixed model approach. Vigor scores were analyzed considering each grader's score and the combinations of two, three, four, and five graders. Genetic variance was significant for both traits. Visual evaluation was effective in identifying productive genotypes based on the statistical criteria. The optimal number of graders for indirect selection of high-yielding U. ruziziensis genotypes is three.
Resumo em Inglês:Abstract IAC Netuno, a black common bean cultivar with high grain yield potential, 2968.20 kg ha-¹, upright plant architecture and Type II indeterminate growth habit, about a 90-day cycle, and 1000-seed weight of 230 grams, recommended for all common bean crop seasons in the state of São Paulo.
Resumo em Inglês:Abstract The black bean cultivar IAC Veloz developed by the dry edible bean (or common bean) breeding program of the Instituto Agronômico-IAC stands out because of its early cycle, upright plant type, 1000 seed weight of 220 grams, and mean yield potential of 3770 kg ha-1 in a total of 18 environments.
Resumo em Inglês:Abstract IAC Nuance and IAC Tigre are special common bean cultivars for consumption in Brazil and for international markets. IAC Nuance has a 75-day cycle, with cranberry type rajado (streaked/dappled) bean seeds. IAC Tigre has 85-day cycle, a cream-colored seed coat with brown specks (pinto bean type). These cultivars are moderately resistant to anthracnose, angular leaf spot, fusarium wilt, common bacterial blight, and bacterial wilt.
Resumo em Inglês:Abstract Cultivar BRS 433FL B2RF is a high-quality fiber upland cotton with high lint yield potential and resistance to several diseases. The introgressed transgenic events Bollgard II® and Roundup Ready Flex® confer enhanced resistance to lepidopteran pests and tolerance to the herbicide glyphosate, respectively. Fiber length exceeds 32.5 mm and fiber strength 33 gf tex-1.
Resumo em Inglês:Abstract IAC 1849 Polaco is a common bean cultivar with a carioca (beige/cream-colored with brown stripes) seed coat, 75-day mean maturity , semi-upright plant architecture, tolerance to seed darkening, mean 1000-seed weight of 240 grams, resistance to the main diseases in common bean, and mean seed yield of 2464 kg ha-1 obtained in 18 experiments.
Resumo em Inglês:Abstract DBW222 is characterized by potential yield of 8210 kg ha-1 under high fertility when sown in timely conditions in North India. It possesses better agronomic attributes and has better adaption to sowing time, high rust resistance, quality attributes, and lodging tolerance because of a shorter 2nd internode and wider diameter.
Resumo em Inglês:Abstract Cultivar IPR 106 resulted from a spontaneous hybridization between “Icatu IAC 925” and an unknow dwarf plant. It is a dwarf cultivar with high rusticity, late ripening cycle, large grains, excellent cup quality and resistance to some populations of the nematodes Meloidogyne paranaensis and M. incognita found in the state of Paraná.
Resumo em Inglês:Abstract This study described the main characteristics of the maize cultivars UENF MSV2210 and UENF MS2208. Adapted to the North and Northwestern regions of the state of Rio de Janeiro, they have a high agronomic performance and were developed for both silage and green maize production.
Resumo em Inglês:Abstract A new strain of Cymbopogon khasianus rich in methyl eugenol was identified and named Jor Lab L-9. It is stable for production of essential oil yield (average 0.81%;σdi2=0.00) and methyl eugenol (average 74.56%;σdi2=0.06). This variety was registered with ICAR-NBPGR, New Delhi, India, under registration number INGR-18037.
Resumo em Inglês:Abstract Amazonian Robustas are ten new clones of high yield potential with characteristics typical of the botanical varieties conilon and robusta. With individual registration, the new cultivars were developed to be grown together with other clones, with flexibility of composition of the crops according to the preference of the producer.
Resumo em Inglês:Abstract: RunData is an online tool that requires internet access. This web application is built in R language, which performs multiple statistical procedures in an intuitive, and simple manner. This tool performs Shapiro-Wilk test, analysis of variance (ANOVA), means tests, and regressions. RunData is available at www.rundata.com.br and sistema.rundata.com.br/shiny/app/.
Resumo em Inglês:Abstract SPEED Stat is a new spreadsheet program for univariate statistical analyses, focused on the dominant profile of agricultural experimentation. The program can perform analysis of variance; tests for normality, homoscedasticity, additivity, outliers; complex contrasts; multiple comparison tests; Scott-Knott's grouping analysis; regression analysis; and others. It has available at speedstatsoftware.wordpress.com.
Resumo em Inglês:Abstract This study aimed to evaluate the resistance of three common bean genotypes (BRS Estilo, A211 and Mortiño) to the Fusarium oxysporum f. sp. phaseoli using different inoculation methods such as the root-dip, the colonized toothpick, and the agar-based disk-diffusion. After 35 days of inoculation, the disease severity was assessed by vascular discoloration on the stem of the plants by two methods: using a scoring scale and measuring the length of the discoloration with the aid of a millimeter ruler (cm). Results showed that the root-dip was the most effective inoculation method. As for the method of assessing the disease severity, the scoring scale was the best one, in addition to being easier for evaluating large amounts of common bean lines.