scholarly journals Quantitative trait loci controlling cyanogenic glucoside and dry matter content in cassava (Manihot esculenta Crantz) roots

Hereditas ◽  
2007 ◽  
Vol 144 (4) ◽  
pp. 129-136 ◽  
Author(s):  
Elizabeth Balyejusa Kizito ◽  
Ann-Christin Rönnberg-Wästljung ◽  
Thomas Egwang ◽  
Urban Gullberg ◽  
Martin Fregene ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Manihot Esculenta ◽  
Dry Matter ◽  
Matter Content ◽  
Dry Matter Content ◽  
Manihot Esculenta Crantz ◽  
Cyanogenic Glucoside ◽  
Trait Loci

scholarly journals Effect of mosaic virus diseases on dry matter content and starch yield of five cassava (Manihot esculenta Crantz) accessions in Ghana

2013 ◽  
Vol 12 (27) ◽  
pp. 4310-4316 ◽  
Author(s):  
Elegba Wilfred ◽  
S Appiah rew ◽  
Azu Elaine ◽  
Afful Nusrat ◽  
K S Agbemavor Wisdom ◽  
...  
Keyword(s):  
Mosaic Virus ◽  
Manihot Esculenta ◽  
Dry Matter ◽  
Matter Content ◽  
Dry Matter Content ◽  
Virus Diseases ◽  
Manihot Esculenta Crantz ◽  
Starch Yield

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

2016 ◽  
Vol 155 (4) ◽  
pp. 569-581 ◽  
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.

scholarly journals IDENTIFICACIÓN DE QTLs ASOCIADOS A CARACTERES DE ARQUITECTURA VEGETAL EN YUCA (Manihot esculenta)

2015 ◽  
Vol 21 (1) ◽  
Author(s):  
Camilo López ◽  
Ruben Eduardo Mora Moreno ◽  
Johana Carolina Soto
Keyword(s):  
Quantitative Trait Loci ◽  
Leaf Area ◽  
Plant Height ◽  
Quantitative Trait ◽  
Manihot Esculenta ◽  
Root Weight ◽  
Nucleotide Polymorphisms ◽  
Single Nucleotide ◽  
Trait Loci ◽  
Number Of Shoots

<p class="p1"><strong>RESUMEN</strong></p><p class="p2">La yuca (<em>Manihot esculenta</em>) es el cuarto cultivo en importancia a nivel mundial como fuente de calorías para la población humana después del arroz, el azúcar y el maíz, posicionándose por esta razón como un cultivo primordial para la seguridad alimentaria. Su arquitectura ha sido considerada como un factor clave que subyace a la fisiología del rendimiento, relacionando características morfológicas con productividad. En este trabajo se evaluaron diferentes características de arquitectura vegetal en yuca. Los caracteres fueron evaluados en una población F1 compuesta por 133 hermanos completos (familia K) sembrados en dos lugares biogeográficamente diferentes: La Vega (Cundinamarca) y Arauca (Arauca) en Colombia. Las características evaluadas relacionadas con la arquitectura vegetal fueron altura de la planta (AT), número de brotes (NB), longitud entrenudos (LE), número de raíces (NR), peso de raíces (PR), pigmentación del peciolo (PP), área de la hoja (AH) y tipo de hoja (TH). A partir de los datos obtenidos y empleando un mapa genético de alta densidad basado en SNPs (Single Nucleotide Polymorphisms) se llevó a cabo un análisis de QTLs (Quantitative Trait Loci). Se lograron identificar tres QTLs para La Vega asociados con los caracteres altura total, número de brotes y área de la hoja. Para Arauca se detectaron tres QTLs asociados con altura total, longitud de entrenudos y número de brotes. Los QTLs se distribuyeron en cuatro grupos de ligamiento y explicaron entre 18,93 y 41,92 % de la variación genética.</p><p class="p1"><strong>ABSTRACT</strong></p><p class="p2">Cassava (<em>Manihot esculenta</em>) is the fourth most important crop worldwide as a source of calories for the human population after rice, sugar and corn and therefore it is considered as a staple crop. Cassava’s architecture has been considered as a key factor underlying the physiology of yield, relating morphological traits with productivity. In this work different characteristics of plant architecture were evaluated in a cassava F1 population composed by 133 complete siblings (family K) planted in two biogeographically different zones: La Vega (Cundinamarca) and Arauca (Arauca) in Colombia. The characteristics evaluated related to the vegetal architecture were plant height (AT), number of shoots (NB), internodes length (LE), number of roots (NR), root weight (PR), petiole pigmentation (PP), leaf area (AH) and leaf type (TH). From the data obtained and using a SNP- (Single Nucleotide Polymorphism) high-density genetic map a QTLs analysis (Quantitative Trait Loci) was carried out. It was possible to identify three QTLs for La Vega associated with characters plant height, internodes length and leaf area. From the Arauca’s dataset, three QTLs were detected associated with plant height, number of shoots and internodes length. The QTLs were distributed into four linkage groups and explained between 18.93 and 41.92 % of genetic variation.</p><p class="p2"> </p>

scholarly journals Diallel analysis of provitamin A carotenoid and dry matter content in cassava (Manihot esculenta Crantz)

2016 ◽  
Vol 66 (4) ◽  
pp. 627-635 ◽  
Author(s):  
Williams Esuma ◽  
Robert S. Kawuki ◽  
Liezel Herselman ◽  
Maryke Tine Labuschagne
Keyword(s):  
Manihot Esculenta ◽  
Dry Matter ◽  
Diallel Analysis ◽  
Matter Content ◽  
Provitamin A ◽  
Dry Matter Content

scholarly journals Evaluation of popular cassava varieties for yield and cyanide content under ASAL conditions in Kenya

2020 ◽  
Vol 28 (s1) ◽  
pp. 71-82
Author(s):  
M. Wambua ◽  
R.M.S. Mulwa ◽  
P.F. Arama ◽  
S.A. Atieno ◽  
J.O. Ogendo
Keyword(s):  
Dry Matter ◽  
Arid Regions ◽  
Smallholder Farmers ◽  
Matter Content ◽  
Dry Matter Content ◽  
Manihot Esculenta Crantz ◽  
Western Kenya ◽  
General Preference ◽  
Cassava Varieties ◽  
Cyanide Content

Cassava (Manihot esculenta Crantz) is a staple food crop grown by smallholder farmers in the marginal regions of western, coastal and eastern Kenya. The objective of this study was to evaluate popular cassava varieties for yield and cyanide content in the arid and semi-arid regions of Kenya. The study was carried out at five sites located in three sub-counties of Nakuru county in Kenya. Treatments included a collection of 27 sweet cassava varieties obtained from Western Kenya. Results revealed significant variations among varieties in all sites, for all parameters measured. The highest yields were obtained at Subukia, with the variety MM99/0067 yielding up to 200 t ha-1. Cyanide content varied significant among the varieties and sites; and was high in most of the cultivars, with highest levels recorded in variety Rao Onyoni (17.3 mg100 g-1) grown at the Lare site. The highest dry matter content was recorded in variety Selele rabuor (60.5%), at the Solai III site. Participating farmers ranked the materials based on yield, taste and order of general preference as follows: Subukia site (MM96/0067, NyaTanga, Adhiambo Lera, KME-1 and MH95/0183); Lare site (Nyar AICAD, Nyar Maseno, NyaTanga, and MM96/2480); and Solai site (KME-1, Nyar AICAD, Adhiambo Lera, Karembo, and Obaro dak).

Quantitative trait loci for dry matter digestibility and particle size traits in two-rowed × six-rowed barley population

Euphytica ◽  
2009 ◽  
Vol 172 (3) ◽  
pp. 419-433 ◽  
Author(s):  
Hussein Abdel-Haleem ◽  
Jan G. P. Bowman ◽  
Vladimir Kanazin ◽  
Lisa Surber ◽  
Hope Talbert ◽  
...  
Keyword(s):  
Particle Size ◽  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Dry Matter ◽  
Dry Matter Digestibility ◽  
Trait Loci ◽  
Barley Population

scholarly journals Evaluation of quality and variety of Indonesian cassava (Manihot esculenta Crantz)

2020 ◽  
Vol 10 (1) ◽  
pp. 108-116
Author(s):  
Amarullah
Keyword(s):  
Dry Matter ◽  
Morphological Characteristics ◽  
Matter Content ◽  
Vertical Position ◽  
Dry Matter Content ◽  
Stem Cuttings ◽  
Tuber Weight ◽  
Manihot Esculenta Crantz ◽  
Planting Material ◽  
Cassava Varieties

The evaluating cassava varieties for productivity necessary to assess the cassava stem characteristics for their suitability as planting material and to improve the capability of cassava farmers to select good quality cassava varieties. Cassava varieties are generally distinguished from each other by their morphological characteristics, which include leaf, stem and tuber colour. The cassava planting material used in this study and some of characteristics by five cassava varieties, consisted of mature stem cuttings of about 20 cm in length, containing between 10 and 12 nodes and planted in a vertical position along the top of the ridges. Each plot consisted of 30 plants, with date being taken from ten plants within each plot. Cassava varieties Malang-6 presented the highest yield average is 13.81 tones ha-1 followed by Singgah and Adira-4 i.e. 11.98 t ha-1 and 11.11 t ha-1 of different varieties 1 yang Ketan, which only weighs 6.63 t ha-1. Harvest index varieties of Adira-4, Malang-6, UJ 5 and Singgah were found 0.78, 0.77, 0.77 and 0.76, respectively higher and significantly different IP varieties of glutinous Ketan is 0.58. Malang varieties and Malang-6 that produces the highest tuber weight, has a low dry matter content is 5.65% and 5.62%. The Ketan varieties and UJ-5 has a tuber weight was significantly lower with dry matter content higher than that dried 8.69% and 8.68%. The UJ-5 varieties has a tuber weight starch HCN 230,17 higher and significantly other variety. Int. J. Agril. Res. Innov. Tech. 10(1): 108-116, June 2020

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