Root growth of interspecific sunflower seedlings derived from wild perennial sunflower species

Seiler, Gerald J.

doi:10.4141/cjps07062

Cited by 8 publications

(3 citation statements)

References 26 publications

(31 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4 ) suggesting that targeting certain traits would be sufficient to explain the variation among cassava genotypes at the early growth stage and to screen large germplasm populations for superior root types in future investigations ( Kumar et al., 2012 ). Significant positive correlations also imply that that selection for a given trait will not be detrimental to other traits ( Adu et al., 2017b ; Seiler, 2008 ) and that certain traits could be selected as proxies for others. Low correlation observed between some traits may also be beneficial in permitting independent manipulation of traits ( Adu et al., 2017b ; Gifford et al., 2013 ).…”

Section: Discussionmentioning

confidence: 99%

Characterising shoot and root system trait variability and contribution to genotypic variability in juvenile cassava (Manihot esculenta Crantz) plants

Adu

Asare

Asare‐Bediako

et al. 2018

Heliyon

View full text Add to dashboard Cite

The development of cassava genotypes with root system traits that increase soil resource acquisition could increase yields on infertile soils but there are relatively few work that has quantified cassava root system architecture (RSA). We used an easily adaptable and inexpensive protocol to: (i) measure genotypic variation for RSA and shoot traits of a range of cassava genotypes; and (ii) identify candidate variables that contribute the largest share of variance. Cassava genotypes were grown in soil-filled pots, maintained at 70% field capacity. Shoot and RSA traits were measured on plants grown up to 30, 45 and 60 days. Multivariate analysis was used to determine major traits contributing to variation. The study showed that cassava roots are adventitious in origin consisting of a main root axis and orders of lateral roots, and therefore the historically used term “fibrous roots” are redundant currently not contributing to clarity. There were significant differences (P < 0.05) for traits evaluated. The highest relative root growth rate occurred over the first 30 days and ranged from 0.39 to 0.48 cm day−1. Root fresh weight was significantly correlated with other traits, including root length (r = 0.79), leaf area (r = 0.72), number of lower nodal roots (r = 0.60), indicating that direct selection based on these traits might be sufficient to improve root biomass. Up to the first six principal components explained over 80% of the total variation among the genotypes for the traits measured at 30, 45 and 60 days. Leaf area, root diameter and branching density-related traits were the most important traits contributing to variation. Selection of cassava genotypes based on shoot and root biomass, root diameter and branching density at juvenile growth stage could be successful predictors of nutrient and water-use efficiency in the field. Further studies are required to relate studied juvenile cassava root traits with the performance of field-grown-mature plant with regard to drought, nutrient-use efficiency and yield.

show abstract

Section: Discussionmentioning

confidence: 99%

Characterising shoot and root system trait variability and contribution to genotypic variability in juvenile cassava (Manihot esculenta Crantz) plants

Adu

Asare

Asare‐Bediako

et al. 2018

Heliyon

View full text Add to dashboard Cite

show abstract

“…In the present study, FRY was significantly and positively correlated with most of the root related traits, implying that selection for a given root trait will not have a detrimental effect on yield and other traits [ 35 , 36 , 37 ]. In cassava, storage root yield is the function of the number of storage roots per plant, mean fresh root weight, and dry matter content [ 38 , 39 ].…”

Section: Discussionmentioning

confidence: 71%

On-Farm Multi-Environment Evaluation of Selected Cassava (Manihot esculenta Crantz) Cultivars in South Africa

Amelework

Bairu

Marx

et al. 2022

Plants

View full text Add to dashboard Cite

Cassava is an important starchy root crop grown globally in tropical and subtropical regions. The ability of cassava to withstand difficult growing conditions and long-term storability underground makes it a resilient crop, contributing to food and nutrient security. This study was conducted to evaluate the performance and adaptability of exotic cassava cultivars across different environments in South Africa and to recommend genotypes for cultivation. A total of 11 cassava cultivars were evaluated at six on-farm sites, using a randomized complete block design with three replications. There were highly significant (p < 0.001) variations between genotypes, environments, and their interaction for all yield and yield-related traits studied. This indicates the need to test the genotypes in multiple environments before effective selection and commercialization can be undertaken. MSAF2 and UKF4 showed the overall best performances for most of the traits, whilst UKF9 (49.5%) and P1/19 (48.5%) had the highest dry matter yield. UKF4 (102.7 t ha−1) had the highest yield and greatest root yield stability across environments. MSAF2 did not perform consistently across environments because it was highly susceptible to cassava mosaic disease (CMD). MSAF2 could be used as a donor parent to generate novel clones with large numbers of marketable roots, and high fresh root yields, if the other parent can provide effective resistance to CMD. Based on genotype and environmental mean, Mabuyeni (KwaZulu-Natal), Mandlakazi (Limpopo), and Shatale (Mpumalanga) were found to be better environments for cassava cultivation and testing. This study is a pioneer in cassava research using multiple environments in South Africa. It provides baseline information on the performance of currently available cassava clones, their adaptation to multiple sites, the identification of suitable test sites, and information on current genetic resources for a future breeding program.

show abstract

“…An increased percentage of deep roots in response to water deficits was found with H. petiolaris (Sobrado and Turner, 1986). As for shoot traits, these desirable traits from wild species could be introgressed into cultivated sunflower by interspecific hybridization process resulting in substantial genetic variability in root growth (Seiler, 2008).…”

Section: Root System and Water Capturementioning

confidence: 99%

New challenges for sunflower ideotyping in changing environments and more ecological cropping systems

Debaeke

Casadebaig

Langlade

2021

OCL

View full text Add to dashboard Cite

As a rainfed spring-sown crop, sunflower (Helianthus annuus L.) is increasingly exposed to negative impacts of climate change, especially to high temperatures and drought stress. Incremental, systemic and transformative adaptations have been suggested for reducing the crop vulnerability to these stressful conditions. In addition, innovative cropping systems based on low-input management, organic farming, soil and water conservation practices, intercropping, double-cropping, and/or agroforestry are undergoing marked in agriculture. Because of its plasticity and low-input requirements (nitrogen, water, pesticides), sunflower crop is likely to take part to these new agroecological systems. Aside from current production outputs (yield, oil and cake), ecosystem services (e.g. bee feeding, soil phytoremediation…), and non-food industrial uses are now expected externalities for the crop. The combination of climatic and societal contexts could deeply modify the characteristics of genotypes to be cultivated in the main production areas (either traditional or adoptive). After reviewing these changes, we identify how innovative cropping systems and new environments could modify the traits classically considered up to now, especially in relation to expected ecosystem services. Finally, we consider how research could provide methods to help identifying traits of interest and design ideotypes.

show abstract

Root growth of interspecific sunflower seedlings derived from wild perennial sunflower species

Cited by 8 publications

References 26 publications

Characterising shoot and root system trait variability and contribution to genotypic variability in juvenile cassava (Manihot esculenta Crantz) plants

Characterising shoot and root system trait variability and contribution to genotypic variability in juvenile cassava (Manihot esculenta Crantz) plants

On-Farm Multi-Environment Evaluation of Selected Cassava (Manihot esculenta Crantz) Cultivars in South Africa

New challenges for sunflower ideotyping in changing environments and more ecological cropping systems

Contact Info

Product

Resources

About