Estimates for heritability and consumer-validation of a penetrometer method for phenotyping softness of cooked cassava roots
Although breeders have made significant progress in the genetic improvement of cassava (Manihot esculenta Crantz) for agronomic traits, lack of information on heritability and limited testing of highthroughput phenotyping methods are major limitations to improving root quality traits, such as softness after cooking, which rank high among Ugandan consumers. The objectives of this study were to determine heritability for softness of cooked cassava roots, and quantify the relationship between penetrometer and consumer testing methods for phenotyping softness of cassava roots. Softness defined as the maximum force (N) needed to penetrate cooked root samples using a penetrometer, was evaluated at four cooking time intervals: 15, 30, 45, and 60 min on 268 cassava genotypes. Estimates of broad-sense heritability (repeatability) ranged from 0.17 to 0.37, with the highest value observed at 45 min of cooking time interval. In the second study involving 135 cassava consumers from Kibaale district in Uganda, penetrometer measurements of cooked roots from six cassava varieties were found to be in strong agreement (r2 = 0.91; P-value = 0.003) with ordinal scores of root softness from consumer testing. These results suggest that: (a) softness of cooked cassava roots is a trait amenable for evaluation and selection; and (b) a penetrometer can readily be used for assessment of cooked root softness. These findings form the basis for operationalising the routine assessment of root softness in cassava breeding trials, an output that will enhance ongoing efforts to breed for desired end-user root quality traits.
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dig-cirad-fr-5963292024-01-29T02:58:38Z http://agritrop.cirad.fr/596329/ http://agritrop.cirad.fr/596329/ Estimates for heritability and consumer-validation of a penetrometer method for phenotyping softness of cooked cassava roots. Iragaba Paula, Nuwamanya Ephraim, Wembabazi Enoch, Baguma Yona, Dufour Dominique, Earle E.D., Kerr R.B., Tufan Hale, Gore Michael A., Kawuki R.S.. 2019. African Crop Science Journal, 27 (2) : 147-163.https://doi.org/10.4314/acsj.v27i2.3 <https://doi.org/10.4314/acsj.v27i2.3> Estimates for heritability and consumer-validation of a penetrometer method for phenotyping softness of cooked cassava roots Iragaba, Paula Nuwamanya, Ephraim Wembabazi, Enoch Baguma, Yona Dufour, Dominique Earle, E.D. Kerr, R.B. Tufan, Hale Gore, Michael A. Kawuki, R.S. eng 2019 African Crop Science Journal Q04 - Composition des produits alimentaires F30 - Génétique et amélioration des plantes manioc Manihot esculenta légume racine héritabilité propriété physicochimique tendreté cuisson aliment préparé phénotype amélioration des plantes enquête auprès des consommateurs http://aims.fao.org/aos/agrovoc/c_9649 http://aims.fao.org/aos/agrovoc/c_4579 http://aims.fao.org/aos/agrovoc/c_6647 http://aims.fao.org/aos/agrovoc/c_3570 http://aims.fao.org/aos/agrovoc/c_1521 http://aims.fao.org/aos/agrovoc/c_28590 http://aims.fao.org/aos/agrovoc/c_1851 http://aims.fao.org/aos/agrovoc/c_6170 http://aims.fao.org/aos/agrovoc/c_5776 http://aims.fao.org/aos/agrovoc/c_5956 http://aims.fao.org/aos/agrovoc/c_28656 Ouganda http://aims.fao.org/aos/agrovoc/c_8038 Although breeders have made significant progress in the genetic improvement of cassava (Manihot esculenta Crantz) for agronomic traits, lack of information on heritability and limited testing of highthroughput phenotyping methods are major limitations to improving root quality traits, such as softness after cooking, which rank high among Ugandan consumers. The objectives of this study were to determine heritability for softness of cooked cassava roots, and quantify the relationship between penetrometer and consumer testing methods for phenotyping softness of cassava roots. Softness defined as the maximum force (N) needed to penetrate cooked root samples using a penetrometer, was evaluated at four cooking time intervals: 15, 30, 45, and 60 min on 268 cassava genotypes. Estimates of broad-sense heritability (repeatability) ranged from 0.17 to 0.37, with the highest value observed at 45 min of cooking time interval. In the second study involving 135 cassava consumers from Kibaale district in Uganda, penetrometer measurements of cooked roots from six cassava varieties were found to be in strong agreement (r2 = 0.91; P-value = 0.003) with ordinal scores of root softness from consumer testing. These results suggest that: (a) softness of cooked cassava roots is a trait amenable for evaluation and selection; and (b) a penetrometer can readily be used for assessment of cooked root softness. These findings form the basis for operationalising the routine assessment of root softness in cassava breeding trials, an output that will enhance ongoing efforts to breed for desired end-user root quality traits. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/596329/1/596329.pdf text cc_by_nc info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc/4.0/ https://doi.org/10.4314/acsj.v27i2.3 10.4314/acsj.v27i2.3 info:eu-repo/semantics/altIdentifier/doi/10.4314/acsj.v27i2.3 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.4314/acsj.v27i2.3 |
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Q04 - Composition des produits alimentaires F30 - Génétique et amélioration des plantes manioc Manihot esculenta légume racine héritabilité propriété physicochimique tendreté cuisson aliment préparé phénotype amélioration des plantes enquête auprès des consommateurs http://aims.fao.org/aos/agrovoc/c_9649 http://aims.fao.org/aos/agrovoc/c_4579 http://aims.fao.org/aos/agrovoc/c_6647 http://aims.fao.org/aos/agrovoc/c_3570 http://aims.fao.org/aos/agrovoc/c_1521 http://aims.fao.org/aos/agrovoc/c_28590 http://aims.fao.org/aos/agrovoc/c_1851 http://aims.fao.org/aos/agrovoc/c_6170 http://aims.fao.org/aos/agrovoc/c_5776 http://aims.fao.org/aos/agrovoc/c_5956 http://aims.fao.org/aos/agrovoc/c_28656 http://aims.fao.org/aos/agrovoc/c_8038 Q04 - Composition des produits alimentaires F30 - Génétique et amélioration des plantes manioc Manihot esculenta légume racine héritabilité propriété physicochimique tendreté cuisson aliment préparé phénotype amélioration des plantes enquête auprès des consommateurs http://aims.fao.org/aos/agrovoc/c_9649 http://aims.fao.org/aos/agrovoc/c_4579 http://aims.fao.org/aos/agrovoc/c_6647 http://aims.fao.org/aos/agrovoc/c_3570 http://aims.fao.org/aos/agrovoc/c_1521 http://aims.fao.org/aos/agrovoc/c_28590 http://aims.fao.org/aos/agrovoc/c_1851 http://aims.fao.org/aos/agrovoc/c_6170 http://aims.fao.org/aos/agrovoc/c_5776 http://aims.fao.org/aos/agrovoc/c_5956 http://aims.fao.org/aos/agrovoc/c_28656 http://aims.fao.org/aos/agrovoc/c_8038 |
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Q04 - Composition des produits alimentaires F30 - Génétique et amélioration des plantes manioc Manihot esculenta légume racine héritabilité propriété physicochimique tendreté cuisson aliment préparé phénotype amélioration des plantes enquête auprès des consommateurs http://aims.fao.org/aos/agrovoc/c_9649 http://aims.fao.org/aos/agrovoc/c_4579 http://aims.fao.org/aos/agrovoc/c_6647 http://aims.fao.org/aos/agrovoc/c_3570 http://aims.fao.org/aos/agrovoc/c_1521 http://aims.fao.org/aos/agrovoc/c_28590 http://aims.fao.org/aos/agrovoc/c_1851 http://aims.fao.org/aos/agrovoc/c_6170 http://aims.fao.org/aos/agrovoc/c_5776 http://aims.fao.org/aos/agrovoc/c_5956 http://aims.fao.org/aos/agrovoc/c_28656 http://aims.fao.org/aos/agrovoc/c_8038 Q04 - Composition des produits alimentaires F30 - Génétique et amélioration des plantes manioc Manihot esculenta légume racine héritabilité propriété physicochimique tendreté cuisson aliment préparé phénotype amélioration des plantes enquête auprès des consommateurs http://aims.fao.org/aos/agrovoc/c_9649 http://aims.fao.org/aos/agrovoc/c_4579 http://aims.fao.org/aos/agrovoc/c_6647 http://aims.fao.org/aos/agrovoc/c_3570 http://aims.fao.org/aos/agrovoc/c_1521 http://aims.fao.org/aos/agrovoc/c_28590 http://aims.fao.org/aos/agrovoc/c_1851 http://aims.fao.org/aos/agrovoc/c_6170 http://aims.fao.org/aos/agrovoc/c_5776 http://aims.fao.org/aos/agrovoc/c_5956 http://aims.fao.org/aos/agrovoc/c_28656 http://aims.fao.org/aos/agrovoc/c_8038 Iragaba, Paula Nuwamanya, Ephraim Wembabazi, Enoch Baguma, Yona Dufour, Dominique Earle, E.D. Kerr, R.B. Tufan, Hale Gore, Michael A. Kawuki, R.S. Estimates for heritability and consumer-validation of a penetrometer method for phenotyping softness of cooked cassava roots |
description |
Although breeders have made significant progress in the genetic improvement of cassava (Manihot esculenta Crantz) for agronomic traits, lack of information on heritability and limited testing of highthroughput phenotyping methods are major limitations to improving root quality traits, such as softness after cooking, which rank high among Ugandan consumers. The objectives of this study were to determine heritability for softness of cooked cassava roots, and quantify the relationship between penetrometer and consumer testing methods for phenotyping softness of cassava roots. Softness defined as the maximum force (N) needed to penetrate cooked root samples using a penetrometer, was evaluated at four cooking time intervals: 15, 30, 45, and 60 min on 268 cassava genotypes. Estimates of broad-sense heritability (repeatability) ranged from 0.17 to 0.37, with the highest value observed at 45 min of cooking time interval. In the second study involving 135 cassava consumers from Kibaale district in Uganda, penetrometer measurements of cooked roots from six cassava varieties were found to be in strong agreement (r2 = 0.91; P-value = 0.003) with ordinal scores of root softness from consumer testing. These results suggest that: (a) softness of cooked cassava roots is a trait amenable for evaluation and selection; and (b) a penetrometer can readily be used for assessment of cooked root softness. These findings form the basis for operationalising the routine assessment of root softness in cassava breeding trials, an output that will enhance ongoing efforts to breed for desired end-user root quality traits. |
format |
article |
topic_facet |
Q04 - Composition des produits alimentaires F30 - Génétique et amélioration des plantes manioc Manihot esculenta légume racine héritabilité propriété physicochimique tendreté cuisson aliment préparé phénotype amélioration des plantes enquête auprès des consommateurs http://aims.fao.org/aos/agrovoc/c_9649 http://aims.fao.org/aos/agrovoc/c_4579 http://aims.fao.org/aos/agrovoc/c_6647 http://aims.fao.org/aos/agrovoc/c_3570 http://aims.fao.org/aos/agrovoc/c_1521 http://aims.fao.org/aos/agrovoc/c_28590 http://aims.fao.org/aos/agrovoc/c_1851 http://aims.fao.org/aos/agrovoc/c_6170 http://aims.fao.org/aos/agrovoc/c_5776 http://aims.fao.org/aos/agrovoc/c_5956 http://aims.fao.org/aos/agrovoc/c_28656 http://aims.fao.org/aos/agrovoc/c_8038 |
author |
Iragaba, Paula Nuwamanya, Ephraim Wembabazi, Enoch Baguma, Yona Dufour, Dominique Earle, E.D. Kerr, R.B. Tufan, Hale Gore, Michael A. Kawuki, R.S. |
author_facet |
Iragaba, Paula Nuwamanya, Ephraim Wembabazi, Enoch Baguma, Yona Dufour, Dominique Earle, E.D. Kerr, R.B. Tufan, Hale Gore, Michael A. Kawuki, R.S. |
author_sort |
Iragaba, Paula |
title |
Estimates for heritability and consumer-validation of a penetrometer method for phenotyping softness of cooked cassava roots |
title_short |
Estimates for heritability and consumer-validation of a penetrometer method for phenotyping softness of cooked cassava roots |
title_full |
Estimates for heritability and consumer-validation of a penetrometer method for phenotyping softness of cooked cassava roots |
title_fullStr |
Estimates for heritability and consumer-validation of a penetrometer method for phenotyping softness of cooked cassava roots |
title_full_unstemmed |
Estimates for heritability and consumer-validation of a penetrometer method for phenotyping softness of cooked cassava roots |
title_sort |
estimates for heritability and consumer-validation of a penetrometer method for phenotyping softness of cooked cassava roots |
url |
http://agritrop.cirad.fr/596329/ http://agritrop.cirad.fr/596329/1/596329.pdf |
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