Abstract
【Objective】The present study was aimed at evaluating the hybrid heterosis, inbreeding depression and combining ability performed in F1-F3 generations of 14 yield and quality traits among parental materials of soybean in Huang-Huai velleys so as to provide guidelines of parental selection and early generation selection in breeding of hybrid cultivars and inbred line cultivars. 【Method】 A set of eight parental cultivars chosen from Huang-Huai valleys and the US along with their 28 diallel crosses were tested in 2005. The mid-parent heterosis and high-parent heterosis as well as inbreeding depression were evaluated for each of the 14 traits. DIALLEL-SAS05 was used to carry out the combined analysis of variance of combining ability of eight traits in F1, F2 and F3 generations. 【Result】 The obtained results were as follows: (1) There appeared hybrid heterosis and inbreeding depression for yield-related traits, among them, yield heterosis was the largest, that of number of pods per plant and seeds per plant the next, while no obvious heterosis for 100-seed-weight was observed. The traits with high F1 heterosis performed high inbreeding depression in F2 and F3, therefore, were not appropriate for utilization of heterosis in F1-derived generations. But there showed no obvious hybrid heterosis in maturity and quality (protein and oil contents) traits. (2) There existed significant GCA×Generation and SCA×Generation interaction in yield, therefore, the parental cultivars with high combining ability performed in F1 were not necessary with high combining ability in derived inbred generations, while no significant GCA×Generation and SCA×Generation interaction of quality traits were observed, therefore, the combining ability performed in F1 could predict that in derived inbred generations. (3) The yield of the parental materials per se could not be used as an indicator of its GCA, but the protein and oil contents of them per se could be used as an indicator of its GCA. 【Conclusion】 The heterosis of yield was the largest among the traits studied, but that in F1-derived generations declined and, therefore, not useful in production. There might be different superior parental materials and crosses in F1 hybrid cultivars and derived inbred line cultivars. In breeding for line cultivars, selection pressure can be put on early hybrid generations for the effective improvement of the quality traits.
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Claims 14
Claim · model-written summary
Yield heterosis was the largest among the yield-related traits in the soybean F1 hybrids.
- Taxon
- soybean
Glycine maxe0 - Outcome
- yield heterosise1
- Direction
- largeste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“evaluating the hybrid heterosis, inbreeding depression and combining ability performed in F1-F3 generations of 14 yield and quality traits among parental materials of soybean”
e1“among them, yield heterosis was the largest”
Claim · model-written summary
Heterosis for number of pods per plant and seeds per plant was the next largest after yield heterosis.
- Taxon
- soybeanGlycine maxe0
- Outcome
- number of pods per plant and seeds per plante2
- Direction
- the nexte2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“evaluating the hybrid heterosis, inbreeding depression and combining ability performed in F1-F3 generations of 14 yield and quality traits among parental materials of soybean”
e2“that of number of pods per plant and seeds per plant the next”
Claim · model-written summary
No obvious heterosis was observed for 100-seed-weight.
- Taxon
- soybeanGlycine maxe0
- Outcome
- 100-seed-weighte3
- Direction
- no obvious heterosise3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“evaluating the hybrid heterosis, inbreeding depression and combining ability performed in F1-F3 generations of 14 yield and quality traits among parental materials of soybean”
e3“while no obvious heterosis for 100-seed-weight was observed”
Claim · model-written summary
Traits with high F1 heterosis showed high inbreeding depression in F2 and F3 generations.
- Taxon
- soybeanGlycine maxe0
- Material
- F2 and F3e4
- Outcome
- inbreeding depressione4
- Direction
- highe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“evaluating the hybrid heterosis, inbreeding depression and combining ability performed in F1-F3 generations of 14 yield and quality traits among parental materials of soybean”
e4“The traits with high F1 heterosis performed high inbreeding depression in F2 and F3”
Claim · model-written summary
No obvious hybrid heterosis was observed for maturity and quality (protein and oil contents) traits.
- Taxon
- soybeanGlycine maxe0
- Outcome
- maturity and quality (protein and oil contents) traitse5
- Direction
- no obvious hybrid heterosise5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“evaluating the hybrid heterosis, inbreeding depression and combining ability performed in F1-F3 generations of 14 yield and quality traits among parental materials of soybean”
e5“But there showed no obvious hybrid heterosis in maturity and quality (protein and oil contents) traits”
Claim · model-written summary
Significant GCA×Generation and SCA×Generation interaction was found for yield.
- Taxon
- soybeanGlycine maxe0
- Outcome
- GCA×Generation and SCA×Generation interaction in yielde6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“evaluating the hybrid heterosis, inbreeding depression and combining ability performed in F1-F3 generations of 14 yield and quality traits among parental materials of soybean”
e6“There existed significant GCA×Generation and SCA×Generation interaction in yield”
Claim · model-written summary
Parental cultivars with high F1 combining ability were not necessarily high in combining ability in derived inbred generations for yield.
- Taxon
- soybeanGlycine maxe0
- Material
- parental cultivarse7
- Outcome
- combining ability in derived inbred generationse7
- Direction
- not necessarye7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“evaluating the hybrid heterosis, inbreeding depression and combining ability performed in F1-F3 generations of 14 yield and quality traits among parental materials of soybean”
e7“the parental cultivars with high combining ability performed in F1 were not necessary with high combining ability in derived inbred generations”
Claim · model-written summary
No significant GCA×Generation or SCA×Generation interaction was observed for quality traits.
- Taxon
- soybeanGlycine maxe0
- Outcome
- GCA×Generation and SCA×Generation interaction of quality traitse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“evaluating the hybrid heterosis, inbreeding depression and combining ability performed in F1-F3 generations of 14 yield and quality traits among parental materials of soybean”
e1“while no significant GCA×Generation and SCA×Generation interaction of quality traits were observed”
Claim · model-written summary
F1 combining ability could predict combining ability in derived inbred generations for quality traits.
- Taxon
- soybeanGlycine maxe0
- Material
- quality traitse2
- Outcome
- combining abilitye1
- Direction
- could predicte1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“evaluating the hybrid heterosis, inbreeding depression and combining ability performed in F1-F3 generations of 14 yield and quality traits among parental materials of soybean”
e1“the combining ability performed in F1 could predict that in derived inbred generations”
e2“while no significant GCA×Generation and SCA×Generation interaction of quality traits were observed”
Claim · model-written summary
Yield of the parental materials per se could not be used as an indicator of their GCA.
- Taxon
- soybeanGlycine maxe0
- Material
- parental materialse1
- Outcome
- yield of the parental materials per see1
- Direction
- could not be usede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“evaluating the hybrid heterosis, inbreeding depression and combining ability performed in F1-F3 generations of 14 yield and quality traits among parental materials of soybean”
e1“The yield of the parental materials per se could not be used as an indicator of its GCA”
Claim · model-written summary
Protein and oil contents of the parental materials per se could be used as an indicator of their GCA.
- Taxon
- soybeanGlycine maxe0
- Material
- parental materialse1
- Outcome
- protein and oil contentse2
- Direction
- could be usede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“evaluating the hybrid heterosis, inbreeding depression and combining ability performed in F1-F3 generations of 14 yield and quality traits among parental materials of soybean”
e1“The yield of the parental materials per se could not be used as an indicator of its GCA”
e2“but the protein and oil contents of them per se could be used as an indicator of its GCA”
Claim · model-written summary
Yield heterosis declined in F1-derived generations.
- Taxon
- soybeanGlycine maxe0
- Outcome
- heterosis of yielde1
- Direction
- declinede1
- Qualifier
- in F1-derived generationse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“evaluating the hybrid heterosis, inbreeding depression and combining ability performed in F1-F3 generations of 14 yield and quality traits among parental materials of soybean”
e1“The heterosis of yield was the largest among the traits studied, but that in F1-derived generations declined and, therefore, not useful in production”
Claim · model-written summary
Yield heterosis carried into F1-derived generations is not useful in production.
- Taxon
- soybeanGlycine maxe0
- Outcome
- not useful in productione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“evaluating the hybrid heterosis, inbreeding depression and combining ability performed in F1-F3 generations of 14 yield and quality traits among parental materials of soybean”
e1“The heterosis of yield was the largest among the traits studied, but that in F1-derived generations declined and, therefore, not useful in production”
Claim · model-written summary
Selection pressure should be placed on early hybrid generations to improve quality traits in line cultivars.
- Taxon
- soybeanGlycine maxe0
- Outcome
- improvement of the quality traitse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“evaluating the hybrid heterosis, inbreeding depression and combining ability performed in F1-F3 generations of 14 yield and quality traits among parental materials of soybean”
e1“In breeding for line cultivars, selection pressure can be put on early hybrid generations for the effective improvement of the quality traits”