The Inheritance of Yield Components and Beta Carotene Content in Sweet Potato

Mbusa, Heritier; Ngugi, Kahiu; Olubayo, Florence; Kivuva, Benjamin; Muthomi, James W.; Nzuve, Felister M.

doi:10.5539/jas.v10n2p71

Cited by 10 publications

(12 citation statements)

References 13 publications

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“…Therefore it is possible that chromoplast and amyloplast may be competing for the same organelles as reported by Cervantes-Flores et al (2011). In addition, beta carotene content was negatively correlated with fresh root yield (Table 5) indicating that selection of genotypes for high beta carotene and root dry matter contents would result in lower fresh root yield because of their negative association existed between them (Woolfe, 1992;Mbusa et al, 2018).…”

Section: Discussionmentioning

confidence: 93%

Agronomic Performance of Kenyan Orange Fleshed Sweet Potato Varieties

Mbusa¹,

Ngugi²,

Olubayo³

et al. 2018

JPS

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Sweet potato is one of the most important staple crops in Sub-Sahara Africa because of its supply of carbohydrates, vitamin A and C, fiber, iron, potassium and protein.The objective of this study was to determine phenotypic variation in diverse sweetpotato varieties for marketable roots, fresh root yield, fresh biomass weight, harvest index, beta carotene content and root dry matter content. Twenty five sweet potato genotypes were evaluated at two sites in two seasons in Kenya using a randomized complete block design of three replications. The results indicated that there were highly significantly variations for genotypes and sites for all the traits studied. There were no significant differences for genotype x site x season effects for the traits except for the number of marketable roots and fresh root yield. The mean fresh root was 32.19 t/ha,with the genotype Ininda expressing the highest fresh root yield of 54.79 t/ha. Genotypes, Naspot 13, Ejumula, Kabode, Vitaa and Tio-Joe gave the highest beta carotene content ranging between 11.830 and 10.040 mg/100g; with a mean of 5.384 mg/100g. The mean root dry matter content was 24.84 % with clones Amelia and Melinda showing the highest and lowest root dry matter content of 30.62 and 16.52 % respectively. Ten genotypes including Ininda, Erica, Jane, Naspot 13, Ejumula, Kabode, Vitaa, Tio-Joe, Amelia and Mayai were recommended as potential parents for sweet potato breeding program in Kenya.

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Section: Discussionmentioning

confidence: 93%

Agronomic Performance of Kenyan Orange Fleshed Sweet Potato Varieties

Mbusa¹,

Ngugi²,

Olubayo³

et al. 2018

JPS

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“…The higher the diversity of characters who want to be improved, the selection process will be better and can increase the response to selection value. Increasing diversity in plants can use mutations (Molina 2017;Nair 2014), molecular (Buu and MyMy 2003;Boukar et al 2016), and crosses (Mbusa et al 2018;Jean Baptiste 2011).…”

Section: Introductionmentioning

confidence: 99%

Diversity and inheritance in cowpea (Vigna unguiculata) on protein and yield components characters

Purnamasari¹,

Sobir²,

Syukur³

2019

Biodiversitas

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Abstract. Purnamasari I, Sobir, Syukur M. 2019. Diversity and inheritance in cowpea (Vigna unguiculata) on protein and yield components characters. Biodiversitas 20: 1294-1298. Diallel was a method that can be used to see inheritance and diversity character of plants. The objective of this study has evaluated the inheritance and diversity of the yield component characters and seed protein content. This study used genetic material from five homozygous cowpeas (Vigna unguiculata (L.) Walp) genotypes (KM1, KM2, KM4, KM5, and TG2) and 20 F1. Genotypes were planted using a randomized complete block design with three replications. The character observed were the yield components (weight of 100 seed, number of seeds per pod, number of pods per bunch, number of pods per plant and yield) and seeds protein content. Characters that were influenced by general combining ability (GCA) consist of weight of 100 seeds, number of pods per bunch, number of seeds per pod and seed protein content. The variance of GCA has a greater value than the variance of specific combining ability (SCA). Narrow sense and broad sense heritability values were high category consist of weight 100 seed, number seeds per pod, number pods per bunch and seed protein content. That characters were inherited additively. Characters were influenced by additive gene action and have high diversity make it possible to select in F2 generation using the pedigree selection method.

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“…The reduced number of selected individuals allows for a comfortable size that could be subjected to more demanding quantitative screening analysis for carotenoid content in the later stages of the program to save cost. Beta-carotene (carotenoid content in our case) can be measured quantitatively through a color chart (visual assessment) estimate since its field estimates (based on the chart carotenoid content values) significantly correlated with those from the laboratory analysis (quantification) in sweet potatoes [25]. The low positive correlation (not significant) between carotenoid content and dry matter content may not be very useful for developing cassava varieties that combine both characteristics.…”

Section: Discussionmentioning

confidence: 92%

“…The low positive correlation (not significant) between carotenoid content and dry matter content may not be very useful for developing cassava varieties that combine both characteristics. Negative correlations between carotenoid content and dry matter content in both cassava and sweet potatoes were reported [5,25].…”

Section: Discussionmentioning

confidence: 99%

Genetic Analysis of Yield and Quality Characteristics in Provitamin A Hybrid Cassava Families in Ghana

et al. 2021

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Cassava is the most widely cultivated and consumed crop in Ghana. Malnutrition is endemic in cassava-producing regions of Africa, partly due to the low micronutrient content of this crop. The aim of this study was to generate genetic information on characteristics such as total carotenoid content, dry matter content, root weight and number, and cassava mosaic disease (CMD), and their possible combination in cassava clones, using a North Carolina II breeding scheme. Five genetically diverse yellow-fleshed clones at advanced selection stages, with CMD resistance, were used as females and two high dry matter content white-fleshed clones, selected from farmers’ fields in Ghana, were used as males. Ten F1 families were generated, and evaluated at two locations in Ghana. General combining ability (GCA) mean squares were larger than specific combining ability (SCA) mean squares for harvest index, CMD, and carotenoid content, indicating additive genetic effects. The positive significant correlations that were observed between pulp color and carotenoid content; carotenoid content and CMD; pulp color and CMD; and pulp color and cortex color, make the screening of large numbers of progenies possible in the cassava breeding program. This could allow breeders to combine carotenoid content and CMD at the early breeding stages through visual assessment of pulp color and CMD symptoms. Large numbers of genotypes can be evaluated and a few can be selected to be quantified for carotenoid content at later stages of the breeding program, to save costs. One of the parents (P6), showed positive GCA effects for carotenoid content, dry matter content, CMD and storage root weight, hence could be used as a parent to generate clones that combine carotenoid content and dry matter content.

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The Inheritance of Yield Components and Beta Carotene Content in Sweet Potato

Cited by 10 publications

References 13 publications

Agronomic Performance of Kenyan Orange Fleshed Sweet Potato Varieties

Agronomic Performance of Kenyan Orange Fleshed Sweet Potato Varieties

Diversity and inheritance in cowpea (Vigna unguiculata) on protein and yield components characters

Genetic Analysis of Yield and Quality Characteristics in Provitamin A Hybrid Cassava Families in Ghana

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