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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.


Mean monthly maximum and minimum temperatures (°C) and total monthly rainfall (mm) at Yuzhong (A) and Linze (B), respectively.
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Figure 1: Mean monthly maximum and minimum temperatures (°C) and total monthly rainfall (mm) at Yuzhong (A) and Linze (B), respectively.

Mentions: The M. officinalis HS families were established at two locations: Yuzhong (104°09′ E, 35°89′ N, elevation 1 653 m a.s.l.) and Linze (100°02′ E, 39°15′ N, elevation 1 390 m a.s.l.) in Gansu Province, China. There are different climate conditions between Yuzhong and linze. Yuzhong in Loess Plateau region is a medium temperate semi-arid climate, whereas Linze in the Hexi Corridor is typical desert climate and characterized by an arid climate (Su et al., 2007; Hu et al., 2012; Li et al., 2014). The average annual precipitation in Yuzhong is 295 mm and in Linze is only 117 mm. The mean monthly minimum and maximum temperatures, and total monthly rainfall during the trial period at the two locations are shown in Figure 1.


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)

Mean monthly maximum and minimum temperatures (°C) and total monthly rainfall (mm) at Yuzhong (A) and Linze (B), respectively.
© Copyright Policy
Related In: Results  -  Collection

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

Figure 1: Mean monthly maximum and minimum temperatures (°C) and total monthly rainfall (mm) at Yuzhong (A) and Linze (B), respectively.
Mentions: The M. officinalis HS families were established at two locations: Yuzhong (104°09′ E, 35°89′ N, elevation 1 653 m a.s.l.) and Linze (100°02′ E, 39°15′ N, elevation 1 390 m a.s.l.) in Gansu Province, China. There are different climate conditions between Yuzhong and linze. Yuzhong in Loess Plateau region is a medium temperate semi-arid climate, whereas Linze in the Hexi Corridor is typical desert climate and characterized by an arid climate (Su et al., 2007; Hu et al., 2012; Li et al., 2014). The average annual precipitation in Yuzhong is 295 mm and in Linze is only 117 mm. The mean monthly minimum and maximum temperatures, and total monthly rainfall during the trial period at the two locations are shown in Figure 1.

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.