Abstract
The objectives of this study were to estimate genetic parameters and identify traits that contribute to early yield in Manihot esculenta Crantz. Ten traits were evaluated in two experiments, one with 138 genotypes and the other with 133, using a completely randomized block design with four replications. All genotype effects were significant. The accuracy was high for the traits, except leaf retention (0.57), and reliability ranged from 0.33 to 0.75. Root weight (RW) and number of roots (NR) showed the highest selection effectiveness (CV r ), although the estimate was less than 1. Moreover, RW and NR obtained high genetic correlation (0.70). Path analysis showed that only number of roots had a significant direct effect on root weight (0.49), and no indirect effect was found. Therefore, accessions exhibited sufficient genetic variability, and indirect selection based on early evaluation of number of roots can be applied in cassava breeding for fresh root yield, increasing gain over time.
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Claims 10
Claim · model-written summary
All genotype effects were significant.
- Taxon
- Manihot esculenta Crantz
Manihot esculentae0 - Material
- genotypee1
- Outcome
- genotype effectse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Manihot esculenta Crantz”
e1“All genotype effects were significant”
Claim · model-written summary
Trait accuracy was high except for leaf retention, which had accuracy 0.57.
- Taxon
- Manihot esculenta CrantzManihot esculentae0
- Outcome
- accuracye1
- Direction
- highe1
- Value
- 0.57e1
- Qualifier
- except leaf retentione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Manihot esculenta Crantz”
e1“The accuracy was high for the traits, except leaf retention (0.57)”
Claim · model-written summary
Reliability ranged from 0.33 to 0.75.
- Taxon
- Manihot esculenta CrantzManihot esculentae0
- Outcome
- reliabilitye1
- Value
- 0.33 to 0.75e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Manihot esculenta Crantz”
e1“reliability ranged from 0.33 to 0.75”
Claim · model-written summary
Root weight had among the highest selection effectiveness, although the estimate was below one.
- Taxon
- Manihot esculenta CrantzManihot esculentae0
- Organ / stage
- Root weighte1
- Outcome
- selection effectivenesse1
- Direction
- higheste1
- Qualifier
- less than 1e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Manihot esculenta Crantz”
e1“Root weight (RW) and number of roots (NR) showed the highest selection effectiveness (CV r ), although the estimate was less than 1”
Claim · model-written summary
Number of roots had among the highest selection effectiveness, although the estimate was below one.
- Taxon
- Manihot esculenta CrantzManihot esculentae0
- Organ / stage
- number of rootse1
- Outcome
- selection effectivenesse1
- Direction
- higheste1
- Qualifier
- less than 1e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Manihot esculenta Crantz”
e1“Root weight (RW) and number of roots (NR) showed the highest selection effectiveness (CV r ), although the estimate was less than 1”
Claim · model-written summary
Root weight and root number had a high genetic correlation of 0.70.
- Taxon
- Manihot esculenta CrantzManihot esculentae0
- Organ / stage
- Root weighte2
- Outcome
- genetic correlatione1
- Direction
- highe1
- Value
- 0.70e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Manihot esculenta Crantz”
e1“RW and NR obtained high genetic correlation (0.70)”
e2“Root weight (RW) and number of roots (NR)”
Claim · model-written summary
Number of roots had a significant direct effect on root weight of 0.49.
- Taxon
- Manihot esculenta CrantzManihot esculentae0
- Organ / stage
- number of rootse1
- Outcome
- direct effect on root weighte1
- Value
- 0.49e1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Manihot esculenta Crantz”
e1“only number of roots had a significant direct effect on root weight (0.49)”
Claim · model-written summary
Path analysis found no indirect effect on root weight.
- Taxon
- Manihot esculenta CrantzManihot esculentae0
- Organ / stage
- number of rootse2
- Outcome
- indirect effecte1
- Direction
- noe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Manihot esculenta Crantz”
e1“no indirect effect was found”
e2“Path analysis showed that only number of roots had a significant direct effect on root weight (0.49), and no indirect effect was found”
Claim · model-written summary
The accessions showed sufficient genetic variability.
- Taxon
- Manihot esculenta CrantzManihot esculentae0
- Material
- accessionse1
- Outcome
- genetic variabilitye1
- Direction
- sufficiente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Manihot esculenta Crantz”
e1“accessions exhibited sufficient genetic variability”
Claim · model-written summary
The authors recommend indirect selection using early root number evaluation for cassava fresh root yield to increase gain over time.
- Taxon
- cassavaManihot esculentae0
- Outcome
- indirect selection based on early evaluation of number of rootse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cassava breeding for fresh root yield, increasing gain over time”
e1“indirect selection based on early evaluation of number of roots can be applied in cassava breeding for fresh root yield, increasing gain over time”