Genetic Variability in Cassava as it Influences Storage Root Yield in Nigeria

Aina, O.O.; Dixon, A. G. O.; Akinrinde, Ezekiel Akinkunmi

doi:10.3923/jbs.2007.765.770

Cited by 17 publications

(9 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar results obtained in the present study, with = 20.93%, were observed for other character in cassava, such as fresh root yield (Farias Neto et al, 2013). In contrast, above 50% was observed for root and stem productive traits in cassava (Aina et al, 2007;Oliveira et al, 2015).…”

Section: Estimates Of Genetic Parameterssupporting

confidence: 79%

Variation in cassava germplasm for tolerance to post-harvest physiological deterioration

Venturini

Santos

Vildoso³

et al. 2016

Genet. Mol. Res.

View full text Add to dashboard Cite

ABSTRACT. Tolerant varieties can effectively control post-harvest physiological deterioration (PPD) of cassava, although knowledge on the genetic variability and inheritance of this trait is needed. The objective of this study was to estimate genetic parameters and identify sources of tolerance to PPD and their stability in cassava accessions. Roots from 418 cassava accessions, grown in four independent experiments, were evaluated for PPD tolerance 0, 2, 5, and 10 days post-harvest. Data were transformed into area under the PPD-progress curve (AUP-PPD) to quantify tolerance. Genetic parameters, stability (Si), adaptability (Ai), and the joint analysis of stability and adaptability (Zi) were obtained via residual maximum likelihood (REML) and best linear unbiased prediction (BLUP) methods. Variance in the genotype (G) x environment (E) interaction and genotypic variance were important for PPD tolerance. Individual broad-sense heritability ( , Si, Ai, and Zi, respectively, compared with the overall mean for each parameter. These results demonstrate the variability and potential of cassava germplasm to introduce PPD tolerance in commercial varieties.

show abstract

Section: Estimates Of Genetic Parameterssupporting

confidence: 79%

Variation in cassava germplasm for tolerance to post-harvest physiological deterioration

Venturini

Santos

Vildoso³

et al. 2016

Genet. Mol. Res.

View full text Add to dashboard Cite

show abstract

“…Storage root yield is the central trait in all cassava breeding programmes (Aina et al 2007; Ntawuruhunga & Dixon 2010) and has been reported to be genetically correlated with storage root number (SRN), harvest index (HI), storage root size and canopy size (Ntawuruhunga & Dixon 2010). Yield improvement can be achieved through exploiting the genetic variability within cassava germplasm (Aina et al 2007). High levels of genetic variability are required amongst parental germplasm to facilitate an effective long-term plant breeding programme and also to justify the need for selection.…”

Section: Introductionmentioning

confidence: 99%

“…Extensive research has been directed towards identifying the optimum harvest time for cassava based on peak storage root yield (Aina et al 2007; Amenorpe et al 2007; Suja et al 2010; Bassey & Harry 2013); however, different harvest dates are reported for different genotypes and regions. Therefore, optimum harvest time is dependent on the genetic background of test genotypes, growing conditions and rate of storage root bulking.…”

Section: Introductionmentioning

confidence: 99%

Genetic variation and association among factors influencing storage root bulking in cassava

et al. 2014

View full text Add to dashboard Cite

Cassava (Manihot esculenta Crantz) is an important storage root crop with largely unexplored and unexplained potentially valuable genetic variability. Genetic variability is important in selecting suitable genotypes for crop improvement. The present study was aimed at assessing the extent of variability in cassava storage root bulking, based on fresh storage root yield accumulated over time. Twelve cassava genotypes were evaluated in a randomized complete block design at three contrasting locations in Uganda. Assessments were done from 5 to 13 months after planting at intervals of 2 months. Genotype, harvest time, location and their interactions were significantly different for fresh storage root yield and most of the other traits assessed. Estimates of variance components revealed that a large portion of the phenotypic variance was accounted for by the genotypic component for all traits assessed indicative of substantial genetic variability among the genotypes evaluated. This genetic variability is important in a hybridization and/or selection programme because it implies that significant genetic gain through phenotypic selection is possible for the traits assessed. Fresh storage root yield was positively and significantly correlated with storage root girth, harvest index, shoot mass and storage root number. The information generated will inform future breeding initiatives to develop early-bulking cassava genotypes with farmer-preferred traits in Uganda.

show abstract

“…This suggests that this component reflects stem diameter, harvest index, petiole length, tuber diameter, plant dry matter content and tuber yield of each genotype. Aina et al, (2007), Raghu et al, (2007 Asare et al, (2011) andBabu Rao et al, (2016) also reported the first two principal components accounting maximum for total variation.…”

Section: Resultsmentioning

confidence: 95%

Genetic Diversity Studies Based on Principal Component Analysis For Yield Attributes in Cassava Genotypes

Rao¹,

Swami²,

Ashok³

et al. 2018

Int.J.Curr.Microbiol.App.Sci

View full text Add to dashboard Cite

Genetic Variability in Cassava as it Influences Storage Root Yield in Nigeria

Cited by 17 publications

References 2 publications

Variation in cassava germplasm for tolerance to post-harvest physiological deterioration

Variation in cassava germplasm for tolerance to post-harvest physiological deterioration

Genetic variation and association among factors influencing storage root bulking in cassava

Genetic Diversity Studies Based on Principal Component Analysis For Yield Attributes in Cassava Genotypes

Contact Info

Product

Resources

About