Manganese fertilization for sweet cassava production under organic management system

ABSTRACT Organic management farms in the Federal District, Brazil, usually present overlimed and overfertilized soils, with high content of organic matter and high pH. These conditions lead to a low availability of manganese to crops. Many sweet cassava (Manihot esculenta Crantz.) crops were diagnosed with Mn deficiency in the region, presenting low yields. In order to overcome such condition, an experiment was established comprising the following treatments: application of MnSO4 banded in rows; treatment of cassava cuttings with a MnSO4 solution before planting; application of MnSO4 and elemental sulfur (S0) banded in the rows, to acidify the soil, increasing the Mn solubility; and leaf spraying of a Mn solution. The best results were revealed when the Mn was applied by foliar spraying and using a combination of methods (treatment of cassava cuttings with Mn, and Mn and S0 applied to the soil before planting). This treatments provided a fresh root yield of 19.5 Mg ha-1, contrasting with the control treatment (3.6 Mg ha-1).

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Retention of total carotenoid and β-carotene in yellow sweet cassava (Manihot esculenta Crantz) after domestic cooking

Food & Nutrition Research ◽

10.3402/fnr.v56i0.15788 ◽

2012 ◽

Vol 56 (1) ◽

pp. 15788 ◽

Cited By ~ 16

Author(s):

LuciaM. J. Carvalho ◽

AlcidesR. G. Oliveira ◽

RonoelL. O. Godoy ◽

Sidney Pacheco ◽

MaríliaR. Nutti ◽

...

Keyword(s):

Manihot Esculenta ◽

Total Carotenoid ◽

Manihot Esculenta Crantz ◽

Β Carotene ◽

Sweet Cassava

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ANALYSIS OF GENETIC DIVERSITY OF 26 CASSAVA VARIETIES (Manihot esculenta CRANTZ) WITH DIFFERENT RESPONSES TO WATERLOGGING CONDITIONS BY USING RAPD MARKERS

Journal of Science Natural Science ◽

10.18173/2354-1059.2021-0058 ◽

2021 ◽

Vol 66 (3) ◽

pp. 170-179

Author(s):

Sengsoulichan Dethvongsa ◽

Vu Nguyen Anh ◽

Van Tran Khanh

Keyword(s):

Genetic Diversity ◽

Phylogenetic Tree ◽

Manihot Esculenta ◽

Rapd Markers ◽

Flood Tolerance ◽

Randomly Amplified Polymorphic Dna ◽

Manihot Esculenta Crantz ◽

Rapd Pcr ◽

Cassava Production ◽

Cassava Varieties

RAPD (Randomly Amplified Polymorphic DNA) is an indicator for high and stable polymorphism, widely used in the study of the diversity of cassava. In this paper, the results of using 20 polymorphic primers OPK combined with the establishment of the phylogenetic tree to analyze the genetic diversity of 26 cassava varieties with different responses to waterlogging conditions by using the RAPD-PCR technique were presented. The purpose of this experiment was to show the genetic relevance of the studied cassava varieties. The results showed that the flood tolerance of cassava was not related to the polymorphism and branching characteristics of the stem. This information may be use as a basis for selecting flood-tolerant cassava varieties for cassava production, as well as the basis for selecting genetically different parents for breeding.

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Metabolic profiles of six African cultivars of cassava ( Manihot esculenta Crantz) highlight bottlenecks of root yield

The Plant Journal ◽

10.1111/tpj.14693 ◽

2020 ◽

Vol 102 (6) ◽

pp. 1202-1219 ◽

Cited By ~ 9

Author(s):

Toshihiro Obata ◽

Patrick A.W. Klemens ◽

Laise Rosado‐Souza ◽

Armin Schlereth ◽

Andreas Gisel ◽

...

Keyword(s):

Manihot Esculenta ◽

Metabolic Profiles ◽

Root Yield ◽

Manihot Esculenta Crantz

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Quantitative trait loci underlying root yield and starch content in an F1 derived cassava population (Manihot esculenta Crantz)

The Journal of Agricultural Science ◽

10.1017/s0021859616000678 ◽

2016 ◽

Vol 155 (4) ◽

pp. 569-581 ◽

Cited By ~ 2

Author(s):

S. SRAPHET ◽

A. BOONCHANAWIWAT ◽

T. THANYASIRIWAT ◽

R. THAIKERT ◽

S. WHANKAEW ◽

...

Keyword(s):

Quantitative Trait Loci ◽

Candidate Genes ◽

Quantitative Trait ◽

Manihot Esculenta ◽

Starch Content ◽

Glycosyl Hydrolases ◽

Root Yield ◽

Manihot Esculenta Crantz ◽

Trait Loci ◽

Gene Expression Studies

SUMMARYCassava (Manihot esculenta Crantz) root yield measured as fresh weight (hereafter root yield) is declining in much of Asia and Africa. The current study aimed to identify quantitative trait loci (QTL) underlying both root and starch fresh weights in F1 cassava. Eight QTL were associated with root yield, underlying 12·9–40·0% of the phenotypic variation (PVE). Nine QTL were associated with starch content, underlying 11·3–27·3% of the PVE. Quantitative trait loci were identified from four different environments that encompassed two locations and 3 years. Consistent QTL for root yield, YLD5_R11 and YLD8_L09 on linkage group (LG) 16, were detected across years and locations. Quantitative trait loci for starch content, ST3_R09, ST6_R10 and ST7_R11 on LG 11, were found across 3 years. Co-localization of QTL for both traits with positive correlation was detected between YLD3_R10 and ST5_R10 on LG 9. Candidate genes within the QTL that were consistent across multiple environments were identified based on cassava genome sequences. Genes predicted to encode for glycosyl hydrolases, uridine 5’-diphospho-(UDP)-glucuronosyl transferases and UDP-glucosyl transferases were found among the 44 genes located within the region containing the QTL controlling starch content. Sixteen genes predicted to encode proteins that were possibly associated with root yield were identified. The QTL controlling root yield and starch content in the current study will be useful for molecular breeding of cassava through marker-assisted selection. The identification of candidate genes underlying both traits will be useful both as markers and for gene expression studies.

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Effect of Nitrogen Fertilization on Yields and Nitrogen Content of Cassava, Llanera Cultivar

The Journal of Agriculture of the University of Puerto Rico ◽

10.46429/jaupr.v59i2.10617 ◽

1969 ◽

Vol 59 (2) ◽

pp. 115-124

Author(s):

R. H. Fox ◽

H. Talleyrand ◽

T. W. Scott

Keyword(s):

Puerto Rico ◽

Nitrogen Fertilization ◽

Manihot Esculenta ◽

Dry Weight ◽

Weight Basis ◽

Fertilizer N ◽

Root Yield ◽

Manihot Esculenta Crantz ◽

Maximum Root ◽

N Rates

Experiments were conducted on two Ultisols in the interior of Puerto Rico to determine the fertilizer N requirements of a high yielding, high root protein variety of cassava (Manihot esculenta Crantz cv. Llanera) from Colombia. This variety appeared to be daylength sensitive and top growth ceased from mid November to mid-February, when days were shorter than 11 1/2 hours. At Corozal (Humatas clay), the crop was grown from mid- March to mid-December and top growth responded strongly and root growth moderately to applied N. High N rates produced low root/top ratios (.67-87) but, due to the experience at the Cidra site, it is assumed that root/top ratios would have increased to higher levels had the crop continued to grow. Apparent recovery of fertilizer N was high (68-69 percent) for the 40 and 80 kg/ha rates. At Cidra (Torres clay), where the crop grew from mid-June until the following May and was dormant for the three winter months, there was no response to N, the top yields were lower but the root/top ratios were higher (average, 1.37) and were not affected by N rates. The lack of response to N was due to the high N supplying power of this soil. The maximum root yields were 23 metric tons/ha at Corozal and 33 metric tons/ha at Cidra. Plants in the highest yielding treatments contained 125-175 kg/ha N. Assuming all N was protein N, unpeeled root protein contents averaged 3.4 percent and peeled 2.3 percent on a dry weight basis and were increased only slightly by higher N rates. The N content of the 4th and 5th fully expanded leaves 4-5 months after planting was very well correlated with final root yield at Corozal (R2 = .99 for 0-160 kg/ha N rates). It appears that a minimum of 5 percent N in these leaves 2 1/2 months after planting is necessary for maximum yields.

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