MORPHOLOGY AND PRODUCTIVITY OF "JUREMINHA" GENOTYPES (Desmanthus spp.) UNDER DIFFERENT CUTTING INTENSITIES

Calado, Thiago Bezerra; Cunha, Márcio Vieira da; Teixeira, Vicente Imbroisi; Santos, Mércia Virgínia Ferreira dos; Cavalcanti, Hactus Souto; Lira, Carolina Câmara

doi:10.1590/1983-21252016v29n326rc

Cited by 12 publications

(10 citation statements)

References 13 publications

(9 reference statements)

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“…In the semiarid region of Pernambuco, Desmanthus sp occurs in different soil types, as well as different environmental characteristics (Queiroz, 2012). Besides, genotypes collected in this region show desirable morphological and productive characteristics for forage plants (Calado et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity of Desmanthus sp accessions using ISSR markers and morphological traits

Costa

Fracetto

et al. 2017

Genet. Mol. Res.

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ABSTRACT. Desmanthus is a genus of forage legumes with high nutritional value, productive potential, and ability to obtain nitrogen in association with diazotrophic bacteria. The use of accurate techniques for genotype identification and characterization is essential for breeding programs. Morphological markers are widely used to know the genetic diversity and the molecular markers are fundamental in these studies. We investigated the genetic diversity among Desmanthus sp genotypes in Pernambuco (Brazilian Northeast State), using morphological traits and ISSR markers. Morphological and molecular characterizations were performed in 18 and 26 accessions, respectively, in plants belonging to the germplasm bank of forage legumes of Universidade Federal Rural de Pernambuco (UFRPE), Academic Unit of Serra Talhada, PE, Brazil. Eight ISSR primers were selected, and 95 loci were generated, with polymorphism of 95.79%. The allele number observed was 1.958, where the effective number was 1.359, and the Nei diversity genetic 2 J.C. Costa et al.Genetics and Molecular Research 16 (2): gmr16029667 index was 0.226. About the morphological markers, seed number was the variable that most contributed to the genetic divergence. A large amount of genetic diversity was observed among Desmanthus species, occurring spontaneously in Pernambuco, Brazil. Thus, the variability found in morphological and ISSR markers is importance for the improvement of Desmanthus spp. Our findings showed that 17L, 27L, 25F, 22F, 19S, 13Au, and 28G accessions could be used in breeding programs to explore the maximum genetic divergence.

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Section: Introductionmentioning

confidence: 99%

Genetic diversity of Desmanthus sp accessions using ISSR markers and morphological traits

Costa

Fracetto

et al. 2017

Genet. Mol. Res.

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“…Leaf:stem ratio varies depending on relative production of leaves and stems. For forage plants, it is important that leaf:stem ratio is greater than 1 (Calado et al 2016). This ratio exerts a great influence with regard to animal nutrition, since the nutrient content and digestibility is generally higher in leaves than in stems (Casanova-Lugo et al 2014).…”

Section: Biomass Production Parametersmentioning

confidence: 99%

Biomass production and nutrient content of three agroforestry tree species growing on an acid Anthropic Ferralsol under recurrent harvesting at different cutting heights

Mukangango

Nduwamungu²,

Naramabuye³

et al. 2020

Agroforest Syst

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Agroforestry systems may alleviate challenges relating to soil degradation and low livestock production for smallholder farmers. Species-adjusted management regimes will determine how agroforestry fits in farming systems. Long-term productivity of biomass in agroforestry systems managed for fodder production requires tree species that coppice after repeated cutting. This study evaluated the effect of different cutting heights (0.3 and 1.0 m) and repeated harvests (1-5) on biomass production and chemical composition of the leguminous trees Acacia angustissima, Leucaena pallida and Mimosa scabrella in a field study on an Anthropic Ferralsol in Southern Rwanda. Shoot biomass production was highest at 0.3 m cutting height for A. angustissima and L. pallida, but M. scabrella could not survive that cutting height. Shoot biomass was highest for A. angustissima and lowest for M. scabrella, which did not adapt to repeated harvests. Leaf:stem ratio was not affected by cutting height. Cutting height did not affect crude protein (CP), but neutral detergent fibre (NDF), acid detergent fibre (ADF) and total polyphenol (TP) concentrations were higher at 1.0 m cutting height than at 0.3 m. Crude protein was highest in A. angustissima and lowest in M. scabrella, while NDF and ADF were highest in M. scabrella. Although all species provided high feed quality in terms of high CP content at both cutting heights, low cutting height (0.3 m) is recommended for A. angustissima and L. pallida for higher overall quality and biomass production.

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“…These have been the subject of several studies, including native species present in Brazil's northeastern semi-arid region, where irregular rainfall patterns influence the vegetation. In this region, Desmanthus plants are commonly named 'Jureminha' (CALADO et al, 2016). Desmanthus plants can display greater herbaceous yields, help recover degraded areas, improve soil fertility and organic matter quality, and reduce industrial inputs in agriculture, thus contributing to reduction of greenhouse gas emissions (GHG).…”

Section: Introductionmentioning

confidence: 99%

BIOMASS AND CHEMICAL RESPONSES OF Desmanthus spp. ACCESSIONS SUBMITTED TO WATER DEPRIVATION1

Queiroz

Santos

Muir³

et al. 2021

Rev. Caatinga

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Due to the predictions of climate change, there is a need to identify forage plants that can keep their productivity and nutritive value under hydric stress. The objective of this study was to evaluate the biomass and chemical responses of three Desmanthus spp. accessions under two water deprivation regimens (7 and 21-day). The experimental design used was randomized blocks in a 3 × 2 factorial arrangement (access and water deprivation) with four replications. There were reductions in the biomasses of leaf and stem fractions of 64% and 51%, respectively. The 43F accession showed greater leaf (1.86 g.plant-1) and stem (1.97 g.plant-1) biomasses under a total water restriction of 21 days, compared to the 89F and AusT accessions. In accessions 43F and 89F, there were carbohydrate accumulations in the leaves of 28% and 51%, respectively, under the 21-day water restriction, while AusT decreased 38% within a 7-day interval. Water deprivation affected the chemical characteristics of the accessions. Free proline was similar among accessions and accumulated 463% more in the leaves of plants submitted to 21-day water deprivation (90.22 mg.kg-1) compared to those subjected to water deprivation for 7 days (16.03 mg.kg-1). Proline and total soluble carbohydrate accumulation in 43F and 89F were insufficient to regulate crude protein, C content, and C:N ratios. These results demonstrate the variability in drought tolerance among accessions. Accessions 43F and 89F were more susceptible to 21-day water deprivation, while AusT showed greater drought tolerance.

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MORPHOLOGY AND PRODUCTIVITY OF "JUREMINHA" GENOTYPES (Desmanthus spp.) UNDER DIFFERENT CUTTING INTENSITIES

Cited by 12 publications

References 13 publications

Genetic diversity of Desmanthus sp accessions using ISSR markers and morphological traits

Genetic diversity of Desmanthus sp accessions using ISSR markers and morphological traits

Biomass production and nutrient content of three agroforestry tree species growing on an acid Anthropic Ferralsol under recurrent harvesting at different cutting heights

BIOMASS AND CHEMICAL RESPONSES OF Desmanthus spp. ACCESSIONS SUBMITTED TO WATER DEPRIVATION1

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