Effect of Soil Moisture Stress on Growth and Yield of Cassava in Nigeria

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

doi:10.3923/pjbs.2007.3085.3090

Cited by 47 publications

(14 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, there was no significant difference for NRRP and FRY. Genetic variation for cassava root traits, including root yield, has been commonly identified in different studies in Brazil (Barreto & Resende, 2010;Oliveira et al, 2014Oliveira et al, , 2015 and in Africa (Aina et al, 2007;Ojulong et al, 2008;Tumuhimbise et al, 2015). Possibly, in the present study, the augmented blocks design was not suitable to detect differences for root yield.…”

Section: Resultscontrasting

confidence: 44%

“…Ojulong et al (2008) obtained the same value for h g 2 for HI when they analyzed 979 genotypes from the International Institute of Tropical Agriculture (IITA); however, Aina et al (2007) found higher value of h g 2 (0.57). In the present study, values of CVg and h g 2 guaranteed genetic gains of 9.82 to 12.14% with the selection of the five best genotypes, when compared with the general mean of the sample (Tables 4 and 5).…”

Section: Resultsmentioning

confidence: 91%

“…Aina et al (2007) identified cassava root traits with moderate values of h g 2 and suggested that they can be improved based on their phenotypic performances.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Genetic parameters and agronomic evaluation of cassava genotypes

Silva

Moura²,

Neto³

et al. 2016

Pesq. agropec. bras.

View full text Add to dashboard Cite

show abstract

Section: Resultscontrasting

confidence: 44%

Section: Resultsmentioning

confidence: 91%

See 1 more Smart Citation

Genetic parameters and agronomic evaluation of cassava genotypes

Silva

Moura²,

Neto³

et al. 2016

Pesq. agropec. bras.

View full text Add to dashboard Cite

show abstract

“…CVe high values (> 50%) have been observed in other cassava studies for traits like shoot weight, and yield per plant and per area (Aina et al, 2007). Furthermore, according to Borges et al (2010), high values for the variation coefficient (> 50%), as observed for shoot weight and average unmarketable root weight in sweet potato (Ipomoea batatas L.), are common when the evaluated trait is a structure located underground, where the environmental control is difficult.…”

Section: Resultsmentioning

confidence: 83%

Genetic parameters for drought-tolerance in cassava

Oliveira

Aidar

Morgante

et al. 2015

Pesq. agropec. bras.

View full text Add to dashboard Cite

-The objective of this work was to evaluate the effect of drought on genetic parameters and breeding values of cassava. The experiments were carried out in a completely randomized block design with three replicates, under field conditions with (WD) or without (FI) water deficit. Yield of storage roots (RoY), shoot (ShY), and starch (StY), as well as the number of roots (NR), and root dry matter content (DMC) were evaluated in 47 cassava accessions. Significant differences were observed among accessions; according to heritability, these differences had mostly a genetic nature. Heritability estimates for genotypic effects ( h g 2 ) ranged from 0.25±0.12 (NR) to 0.60±0.18 (DMC), and from 0.51±0.17 (NR) to 0.80±0.21 (RoY and StY) for WD and FI, respectively, as a consequence of greater environmental influence on WD. Selective accuracy was lower in WD, and ranged from 0.71 (NR) to 0.89 (RoY, DMC, and StY). However, genetic gains were quite high and ranged from 24.43% (DMC) to 113.41% (StY), in WD, and from 8.5% (DMC) to 75.70% (StY) in FI. These genetic parameters may be useful for defining which selection strategies, breeding methods, and experimental designs are more suitable to obtain cassava genetic gains for tolerance to drought.Index terms: Manihot esculenta, breeding, drought stress, germplasm. Parâmetros genéticos da mandioca quanto à tolerância ao deficit hídricoResumo -O objetivo deste trabalho foi avaliar o efeito do deficit hídrico sobre os parâmetros e os valores genéticos da mandioca. Os experimentos foram realizados em delineamento de blocos ao acaso com três repetições, em campo com (CD) ou sem deficit hídrico (SD). A produtividade de raízes (PR), da parte aérea (PA) e de amido (PAM), assim como o número de raízes (NR) e a massa de matéria seca das raízes (MS) foram avaliados em 47 acessos de mandioca. Observaram-se diferenças significativas entre os acessos; conforme a herdabilidade, estas diferenças foram em sua maioria de natureza genética. As estimativas de herdabilidade dos efeitos genotípicos ( h g 2 ) variaram de 0,25±0,12 (NR) a 0,60±0,18 (MS) e de 0,51±0,17 (NR) a 0,80±0,21 (PR e PAM) para CD e SD, respectivamente, em decorrência da maior influência ambiental sobre o CD. A acurácia seletiva foi menor no CD, com variação de 0,71 (NR) a 0,89 (PR, MS e PAM). No entanto, os ganhos genéticos foram elevados, de 24,43% (MS) a 113,41% (PAM) no CD, e de 8,5% (MS) a 75,70% (PAM) no SD. Estes parâmetros genéticos podem ser úteis para definir estratégias de seleção, métodos de melhoramento e delineamentos experimentais mais apropriados, para a obtenção de ganhos genéticos em mandioca quanto à tolerância à seca.Termos para indexação: Manihot esculenta, melhoramento, estresse hídrico, germoplasma.

show abstract

“…Thus, the assessment of soil moisture and rainfall in semiarid regions is crucial to understanding the variability in these areas and to support actions to mitigate the effects of water scarcity. Various studies have been conducted evaluating different semiarid regions of the world (Small and Kurc, 2002;Aina et al, 2007;Fischer et al, 2009;Asare et al, 2011;Mupangwa et al, 2011;Pathak et al, 2011;Zhang et al, 2011;Badel et al, 2013;He et al, 2014;Barbosa et al, 2015;Paredes et al, 2015;Barbosa and Lakshmi Kumar, 2016).…”

Section: Introductionmentioning

confidence: 99%

Impact of Soil Moisture on Crop Yields over Brazilian Semiarid

Rossato

Alvalá

Marengo

et al. 2017

Front. Environ. Sci.

View full text Add to dashboard Cite

The objective of this work was to investigate the relationship between soil water content and rainfall with rice, beans, cassava and corn yields in the semiarid region of Northeast Brazil. Precipitation and modeled soil water content were compared to yields recorded at the county levels in this region. The results were also integrated over the area of the nine States that lie within the officially recognized region of semiarid climate in Brazil. The influence of water balance components was quantified by calculating their correlation coefficient with yields of the different crop species over the municipalities of the region. It was found that rainfall had higher correlation to crop yields over most of the region, while soil water content had lower values of correlation. This result is consistent with the fact that average root depth is 40 cm, lower than the layer of soil used in the model used to estimate soil water content (100 cm). Plants respond better to the precipitation in the top layers of soil, while the water storage in the deep layer of soil might be important only in other temporal and spatial scales of the hydrological cycle.

show abstract

Effect of Soil Moisture Stress on Growth and Yield of Cassava in Nigeria

Cited by 47 publications

References 7 publications

Genetic parameters and agronomic evaluation of cassava genotypes

Genetic parameters and agronomic evaluation of cassava genotypes

Genetic parameters for drought-tolerance in cassava

Impact of Soil Moisture on Crop Yields over Brazilian Semiarid

Contact Info

Product

Resources

About