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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.


Biplots based on standardized Best Linear Unbiased Predictor values for seven morphological traits, measured from the 40 half sib families of M. officinalis, evaluated at Yuzhong (A) and Linze (B). In each of the biplots Components I and II account for most of the total variation. 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.
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Figure 3: Biplots based on standardized Best Linear Unbiased Predictor values for seven morphological traits, measured from the 40 half sib families of M. officinalis, evaluated at Yuzhong (A) and Linze (B). In each of the biplots Components I and II account for most of the total variation. 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.

Mentions: The seven plant trait responses at the locations Yuzhong and Linze are presented in the two biplots, (Figures 3A,B). In Figure 3A, based on breeding line performance at Yuzhong, the first and second principal components accounted for 43 and 19% of the total variation, respectively. Based on the line performance at Linze, the first principle component explained 51% of the total trait variation, and the second principle component explained 23% (Figure 3B).


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)

Biplots based on standardized Best Linear Unbiased Predictor values for seven morphological traits, measured from the 40 half sib families of M. officinalis, evaluated at Yuzhong (A) and Linze (B). In each of the biplots Components I and II account for most of the total variation. 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.
© Copyright Policy
Related In: Results  -  Collection

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

Figure 3: Biplots based on standardized Best Linear Unbiased Predictor values for seven morphological traits, measured from the 40 half sib families of M. officinalis, evaluated at Yuzhong (A) and Linze (B). In each of the biplots Components I and II account for most of the total variation. 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.
Mentions: The seven plant trait responses at the locations Yuzhong and Linze are presented in the two biplots, (Figures 3A,B). In Figure 3A, based on breeding line performance at Yuzhong, the first and second principal components accounted for 43 and 19% of the total variation, respectively. Based on the line performance at Linze, the first principle component explained 51% of the total trait variation, and the second principle component explained 23% (Figure 3B).

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.