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Genotypic Variation in a Breeding Population of Yellow Sweet Clover (Melilotus officinalis).

Luo K, Jahufer MZ, Wu F, Di H, Zhang D, Meng X, Zhang J, Wang Y - Front Plant Sci (2016)

Bottom Line: There was significant (P < 0.05) genotypic variation among the HS families for all traits.There was also significant (P < 0.05) genotype-by-environment interaction for the traits DW, PH, SD, SN, and SV.The breeding population developed by polycrossing the selected HS families within group 3 will provide a significant breeding pool for M. officinalis cultivar development in China.

View Article: PubMed Central - PubMed

Affiliation: State Key Laborotary of Grassland Agro-Ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University Lanzhou, China.

ABSTRACT
Yellow sweet clover is a widely spread legume species that has potential to be used as a forage crop in Western China. However, limited information is available on the genetic variation for herbage yield, key morphological traits, and coumarin content. In this study, 40 half sib (HS) families of M. officinalis were evaluated for genotypic variation and phenotypic and genotypic correlation for the traits: LS (leaf to stem ratio), SV (spring vigor), LA (leaf area), PH (plant height), DW (herbage dry weight), SD (stem diameter), SN (stem number), Cou (coumarin content), SY (seed yield), across two locations, Yuzhong and Linze, in Western China. There was significant (P < 0.05) genotypic variation among the HS families for all traits. There was also significant (P < 0.05) genotype-by-environment interaction for the traits DW, PH, SD, SN, and SV. The estimates of HS family mean repeatability across two locations ranged from 0.32 for SN to 0.89 for LA. Pattern analysis generated four HS family groups where group 3 consisted of families with above average expression for DW and below average expression for Cou. The breeding population developed by polycrossing the selected HS families within group 3 will provide a significant breeding pool for M. officinalis cultivar development in China.

No MeSH data available.


Biplot generated using standardized Best Linear Unbiased Predictor values for eight traits measured from: the 40 half sib families, the 6 parental germplasm accessions and the 2 check cultivars of M. officinalis, evaluated across two locations Yuzhong and Linze. Components I and II account for 46 and 18% of total variation, respectively. The different symbols indicate progeny Groups 1 to 4 generated from cluster analysis. The vectors represent the traits: LS, leaf to stem ratio; LA, leaf area; PH, plant height; DW, herbage dry weight; SD, stem diameter; SN, stem number; SY, seed yield; Cou, coumarin. The 6 parental germplasm accessions: P1 to P6. Check's: CH1, experimental cultivar; CH2, cv Norgold.
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Figure 2: Biplot generated using standardized Best Linear Unbiased Predictor values for eight traits measured from: the 40 half sib families, the 6 parental germplasm accessions and the 2 check cultivars of M. officinalis, evaluated across two locations Yuzhong and Linze. Components I and II account for 46 and 18% of total variation, respectively. The different symbols indicate progeny Groups 1 to 4 generated from cluster analysis. The vectors represent the traits: LS, leaf to stem ratio; LA, leaf area; PH, plant height; DW, herbage dry weight; SD, stem diameter; SN, stem number; SY, seed yield; Cou, coumarin. The 6 parental germplasm accessions: P1 to P6. Check's: CH1, experimental cultivar; CH2, cv Norgold.

Mentions: The biplot (Figure 2) was generated from PCA of the 40 HS families, the six parental germplasm accessions and the two check cultivars of M. officinalis, based on the 9 traits LS, SV, LA, PH, DW, SD, SN, and Cou. The first principle component explained 46% of the total trait variation, and the second principle component explained 18%. The correlation structure of the traits is indicated by the directional vectors in the biplot. In this study, SD, SN, and PH showed a strong positive association with DW. The traits LS and Cou also showed a negative correlation with DW.


Genotypic Variation in a Breeding Population of Yellow Sweet Clover (Melilotus officinalis).

Luo K, Jahufer MZ, Wu F, Di H, Zhang D, Meng X, Zhang J, Wang Y - Front Plant Sci (2016)

Biplot generated using standardized Best Linear Unbiased Predictor values for eight traits measured from: the 40 half sib families, the 6 parental germplasm accessions and the 2 check cultivars of M. officinalis, evaluated across two locations Yuzhong and Linze. Components I and II account for 46 and 18% of total variation, respectively. The different symbols indicate progeny Groups 1 to 4 generated from cluster analysis. The vectors represent the traits: LS, leaf to stem ratio; LA, leaf area; PH, plant height; DW, herbage dry weight; SD, stem diameter; SN, stem number; SY, seed yield; Cou, coumarin. The 6 parental germplasm accessions: P1 to P6. Check's: CH1, experimental cultivar; CH2, cv Norgold.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4940390&req=5

Figure 2: Biplot generated using standardized Best Linear Unbiased Predictor values for eight traits measured from: the 40 half sib families, the 6 parental germplasm accessions and the 2 check cultivars of M. officinalis, evaluated across two locations Yuzhong and Linze. Components I and II account for 46 and 18% of total variation, respectively. The different symbols indicate progeny Groups 1 to 4 generated from cluster analysis. The vectors represent the traits: LS, leaf to stem ratio; LA, leaf area; PH, plant height; DW, herbage dry weight; SD, stem diameter; SN, stem number; SY, seed yield; Cou, coumarin. The 6 parental germplasm accessions: P1 to P6. Check's: CH1, experimental cultivar; CH2, cv Norgold.
Mentions: The biplot (Figure 2) was generated from PCA of the 40 HS families, the six parental germplasm accessions and the two check cultivars of M. officinalis, based on the 9 traits LS, SV, LA, PH, DW, SD, SN, and Cou. The first principle component explained 46% of the total trait variation, and the second principle component explained 18%. The correlation structure of the traits is indicated by the directional vectors in the biplot. In this study, SD, SN, and PH showed a strong positive association with DW. The traits LS and Cou also showed a negative correlation with DW.

Bottom Line: There was significant (P < 0.05) genotypic variation among the HS families for all traits.There was also significant (P < 0.05) genotype-by-environment interaction for the traits DW, PH, SD, SN, and SV.The breeding population developed by polycrossing the selected HS families within group 3 will provide a significant breeding pool for M. officinalis cultivar development in China.

View Article: PubMed Central - PubMed

Affiliation: State Key Laborotary of Grassland Agro-Ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University Lanzhou, China.

ABSTRACT
Yellow sweet clover is a widely spread legume species that has potential to be used as a forage crop in Western China. However, limited information is available on the genetic variation for herbage yield, key morphological traits, and coumarin content. In this study, 40 half sib (HS) families of M. officinalis were evaluated for genotypic variation and phenotypic and genotypic correlation for the traits: LS (leaf to stem ratio), SV (spring vigor), LA (leaf area), PH (plant height), DW (herbage dry weight), SD (stem diameter), SN (stem number), Cou (coumarin content), SY (seed yield), across two locations, Yuzhong and Linze, in Western China. There was significant (P < 0.05) genotypic variation among the HS families for all traits. There was also significant (P < 0.05) genotype-by-environment interaction for the traits DW, PH, SD, SN, and SV. The estimates of HS family mean repeatability across two locations ranged from 0.32 for SN to 0.89 for LA. Pattern analysis generated four HS family groups where group 3 consisted of families with above average expression for DW and below average expression for Cou. The breeding population developed by polycrossing the selected HS families within group 3 will provide a significant breeding pool for M. officinalis cultivar development in China.

No MeSH data available.