國立虎尾科技大學 |

Reproductive Systems in Acacia Crassicarpa Leveraging Breeding Opportunities for Accelerated Delivery of Genetic Gains in Important Quantitative Forestry Traits.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Reproductive Systems in Acacia Crassicarpa Leveraging Breeding Opportunities for Accelerated Delivery of Genetic Gains in Important Quantitative Forestry Traits./
作者:	Martins, Gustavo Salgado.
面頁冊數:	1 online resource (176 pages)
附註:	Source: Dissertations Abstracts International, Volume: 85-01, Section: A.
Contained By:	Dissertations Abstracts International85-01A.
標題:	Wood sciences. -
電子資源:	click for full text (PQDT)
ISBN:	9798379870560

Reproductive Systems in Acacia Crassicarpa Leveraging Breeding Opportunities for Accelerated Delivery of Genetic Gains in Important Quantitative Forestry Traits.
Martins, Gustavo Salgado.

Reproductive Systems in Acacia Crassicarpa Leveraging Breeding Opportunities for Accelerated Delivery of Genetic Gains in Important Quantitative Forestry Traits. - 1 online resource (176 pages)

Source: Dissertations Abstracts International, Volume: 85-01, Section: A.

Thesis (Ph.D.)--North Carolina State University, 2023.

Includes bibliographical references

Acacia crassicarpais an important tree species in Southeast Asia. Its vigorous growth, resistance to pests and diseases, and good bole form are valuable features for tropical forestry. There are still constraints to maximizing the delivery of genetic gains. Although feasible, controlled pollination is impractical for advancing breeding populations requiring a huge effort to produce more than a few crosses per year. Vegetative propagation is possible only with juvenile ortets. Finally, there is limited knowledge about the wood properties of the species.This study applied genomics to unveil mating dynamics, reconstruct full-sib families for trial testing, and evaluate the potential of genomic selection to accelerate genetic gains for the species. Additionally, important wood and pulping properties were characterized, and within-tree patterns of variation were investigated for efficient phenotyping strategies.One season of reproduction in a seed orchard was characterized by genotyping 84,315 seedlings with forty-two SNP markers. The analysis indicated that 67.8% of the seed collected was derived from male parents within the orchard. The average number of male parents per openpollination family was 50, with the average dominant male proportion equal to 23%. The reproductive success of genotypes was highly variable. Cumulative combined male-female reproductive success indicated that 50% of parents produced 80% of the seed. Spatial analysis showed a moderate-high spatial correlation between the mother tree's distance to the pollen source and its proportion within the open-pollination family, with a rapid decay with distance increase. On the wood properties, forty trees were selected for destructive sampling at age 50 months and assessed for wood density, kraft pulp yield, α-cellulose, carbohydrate composition, lignin content, and syringil/guayacil ratio. The mean whole-tree disc basic density was 481 kg m-3and screened kraft pulp yield was 53.8%. Ground-level sampling could reliably predict the whole-tree property for basic density, pulp yield, and glucose content. Using NIR predictions to indirectly measure basic density, correlations with whole-tree density values were sufficient to allow accurate ranking and efficient selection of genotypes in a breeding program context.Genetic control of quantitative traits was studied with full-sib multi-environmental progeny trials measured at 36 months. The traits were predominantly controlled by additive effects, with heritability ranging between 0.09 for survival to 0.45 for basic density. The genetic correlation across sites was high for all traits showing the low impact of genotype-by-environment interaction. The trait-trait correlation showed that straightness was independent of other traits, survival was only correlated with mean annual increment, and growth traits were highly correlated among themselves. Surprisingly, wood basic density was highly correlated with growth traits.Integrating genomic methods into the breeding program of A. crassicarpamade possible the construction of genomic models with excellent breeding value prediction ability. Genomic models outperformed pedigree-based models for all traits, and accurate individual tree selection resulted in valuable gains for all units of selection: individual trees for generation advancement or within-family genomic selection for deployment with family forestry. The average gain from the within-family genomic selection practiced with a selection intensity of 10% on the top five ranked families was 18%, demonstrating the opportunity to effectively double the gains achieved in a generation compared to deployment based on family means.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798379870560Subjects--Topical Terms:

1179683
Wood sciences.
Index Terms--Genre/Form:

554714
Electronic books.

Reproductive Systems in Acacia Crassicarpa Leveraging Breeding Opportunities for Accelerated Delivery of Genetic Gains in Important Quantitative Forestry Traits.
LDR:05207ntm a22004337 4500 001 1149533
005 20241022112123.5
006 m o d
007 cr bn ---uuuuu
008 250605s2023 xx obm 000 0 eng d
020 $a 9798379870560
035 $a (MiAaPQ)AAI30516336
035 $a (MiAaPQ)NCState_Univ18402040867
035 $a AAI30516336
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Martins, Gustavo Salgado. $3 1475810
245 1 0 $a Reproductive Systems in Acacia Crassicarpa Leveraging Breeding Opportunities for Accelerated Delivery of Genetic Gains in Important Quantitative Forestry Traits.
264 0 $c 2023
300 $a 1 online resource (176 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertations Abstracts International, Volume: 85-01, Section: A.
500 $a Advisor: Acosta, Juan J.;Hodge, Gary R.
502 $a Thesis (Ph.D.)--North Carolina State University, 2023.
504 $a Includes bibliographical references
520 $a Acacia crassicarpais an important tree species in Southeast Asia. Its vigorous growth, resistance to pests and diseases, and good bole form are valuable features for tropical forestry. There are still constraints to maximizing the delivery of genetic gains. Although feasible, controlled pollination is impractical for advancing breeding populations requiring a huge effort to produce more than a few crosses per year. Vegetative propagation is possible only with juvenile ortets. Finally, there is limited knowledge about the wood properties of the species.This study applied genomics to unveil mating dynamics, reconstruct full-sib families for trial testing, and evaluate the potential of genomic selection to accelerate genetic gains for the species. Additionally, important wood and pulping properties were characterized, and within-tree patterns of variation were investigated for efficient phenotyping strategies.One season of reproduction in a seed orchard was characterized by genotyping 84,315 seedlings with forty-two SNP markers. The analysis indicated that 67.8% of the seed collected was derived from male parents within the orchard. The average number of male parents per openpollination family was 50, with the average dominant male proportion equal to 23%. The reproductive success of genotypes was highly variable. Cumulative combined male-female reproductive success indicated that 50% of parents produced 80% of the seed. Spatial analysis showed a moderate-high spatial correlation between the mother tree's distance to the pollen source and its proportion within the open-pollination family, with a rapid decay with distance increase. On the wood properties, forty trees were selected for destructive sampling at age 50 months and assessed for wood density, kraft pulp yield, α-cellulose, carbohydrate composition, lignin content, and syringil/guayacil ratio. The mean whole-tree disc basic density was 481 kg m-3and screened kraft pulp yield was 53.8%. Ground-level sampling could reliably predict the whole-tree property for basic density, pulp yield, and glucose content. Using NIR predictions to indirectly measure basic density, correlations with whole-tree density values were sufficient to allow accurate ranking and efficient selection of genotypes in a breeding program context.Genetic control of quantitative traits was studied with full-sib multi-environmental progeny trials measured at 36 months. The traits were predominantly controlled by additive effects, with heritability ranging between 0.09 for survival to 0.45 for basic density. The genetic correlation across sites was high for all traits showing the low impact of genotype-by-environment interaction. The trait-trait correlation showed that straightness was independent of other traits, survival was only correlated with mean annual increment, and growth traits were highly correlated among themselves. Surprisingly, wood basic density was highly correlated with growth traits.Integrating genomic methods into the breeding program of A. crassicarpamade possible the construction of genomic models with excellent breeding value prediction ability. Genomic models outperformed pedigree-based models for all traits, and accurate individual tree selection resulted in valuable gains for all units of selection: individual trees for generation advancement or within-family genomic selection for deployment with family forestry. The average gain from the within-family genomic selection practiced with a selection intensity of 10% on the top five ranked families was 18%, demonstrating the opportunity to effectively double the gains achieved in a generation compared to deployment based on family means.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2024
538 $a Mode of access: World Wide Web
650 4 $a Wood sciences. $3 1179683
650 4 $a Plant sciences. $3 1179743
650 4 $a Genetics. $3 578972
650 4 $a Ethnic studies. $2 bicssc $3 809601
650 4 $a Animal sciences. $3 1178863
650 4 $a Agronomy. $3 1027735
650 4 $a Plant reproduction. $3 1413521
650 4 $a Animal reproduction. $3 1437821
650 4 $a Legumes. $3 795920
650 4 $a Females. $3 1465165
650 4 $a Trees. $3 668775
650 4 $a Glucose. $3 999791
650 4 $a Seeds. $3 1275503
650 4 $a Cellulose. $3 678568
650 4 $a Minority & ethnic groups. $3 1372498
650 4 $a Ecology. $3 575279
650 4 $a Genomics. $3 578973
650 4 $a Plantations. $3 1465454
650 4 $a Biology. $3 599573
650 4 $a Botany. $3 599558
650 4 $a Forestry. $3 668651
650 4 $a Lignin. $3 847953
650 4 $a Flowers & plants. $3 1437778
655 7 $a Electronic books. $2 local $3 554714
690 $a 0306
690 $a 0309
690 $a 0329
690 $a 0478
690 $a 0285
690 $a 0475
690 $a 0631
690 $a 0369
690 $a 0479
690 $a 0746
710 2 $a North Carolina State University. $3 845424
710 2 $a ProQuest Information and Learning Co. $3 1178819
773 0 $t Dissertations Abstracts International $g 85-01A.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30516336 $z click for full text (PQDT)