Abstract
With both the unimproved Cunninghamia lanceolata(Chinese fir) trees(ck1) and the multiple-clonal seed orchards(ck2;i.e.,first generation,one-and-half generation,and second generation seed orchards) as experimental controls,we studied the genetic improved gain,direct and reciprocal crossing effects,and genetic effects of a bi-clonal Chinese fir seed orchard(clones Long-15 and Min-33).We mea-sured qualities of seeds collected in four consecutive years,planted seedling in two consecutive years at four different locations with five replications,and analyzed inheritance traits in the progenies.The results showed that compared to ck1,seeds from the bi-clonal seed orchard increased 6.76%-20.44% quality gains;compared to ck2,thousand-seed weight,seed viability,and seed vigor were superior.The six-year-old progenies derived from the bi-clonal seed orchard had an increase of 46.14% volume gain than ck1,an increase of 10.63%-21.10% than ck2.Both effects of direct crossing and reciprocal crossing on progeny growth,height-diameter ratio and crown diameter were similar;but height,diameter at breast height(DBH) and volume growth were mostly controlled by the gene additive effect;and thousand-seed weight,germination index and seed vigor showed a super dominant effect.
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Claims 7
Claim · model-written summary
Bi-clonal orchard seed quality gains over unimproved trees were 6.76%-20.44%.
Verbatim
e0“compared to ck1,seeds from the bi-clonal seed orchard increased 6.76%-20.44% quality gains”
e1“unimproved Cunninghamia lanceolata(Chinese fir) trees(ck1)”
Claim · model-written summary
Thousand-seed weight, seed viability and seed vigor were superior to multiple-clonal orchards.
Verbatim
e0“compared to ck2,thousand-seed weight,seed viability,and seed vigor were superior”
e1“multiple-clonal seed orchards(ck2”
e2“seeds from the bi-clonal seed orchard”
t0“Chinese fir”
Claim · model-written summary
Six-year progeny volume gain exceeded unimproved trees by 46.14%.
Verbatim
e0“six-year-old progenies derived from the bi-clonal seed orchard had an increase of 46.14% volume gain than ck1”
t0“Chinese fir”
Claim · model-written summary
Six-year progeny volume gain exceeded multiple-clonal orchards by 10.63%-21.10%.
Verbatim
e0“an increase of 10.63%-21.10% than ck2”
e1“volume gain”
e2“progenies derived from the bi-clonal seed orchard”
t0“Chinese fir”
Claim · model-written summary
Direct and reciprocal crossing effects on progeny growth, height-diameter ratio and crown diameter were similar.
Verbatim
e0“Both effects of direct crossing and reciprocal crossing on progeny growth,height-diameter ratio and crown diameter were similar”
t0“Chinese fir”
Claim · model-written summary
Height, DBH and volume growth were mostly controlled by additive gene effects.
- Taxon
- Chinese firt0
- Gene
- gene additive effecte0
- Outcome
- height,diameter at breast height(DBH) and volume growthe0
Not reportedDirection
Verbatim
e0“height,diameter at breast height(DBH) and volume growth were mostly controlled by the gene additive effect”
t0“Chinese fir”
Claim · model-written summary
Thousand-seed weight, germination index and seed vigor showed a super dominant effect.
- Taxon
- Chinese firt0
- Material
- bi-clonal seed orcharde1
- Outcome
- thousand-seed weight,germination index and seed vigore0
Not reportedDirection
Verbatim
e0“thousand-seed weight,germination index and seed vigor showed a super dominant effect”
e1“seeds from the bi-clonal seed orchard”
t0“Chinese fir”