東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Leveraging Genetic Diversity in Maiz...

Perkins, Alden,

FindBook

Google Book

Amazon

博客來

Leveraging Genetic Diversity in Maize Breeding /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Leveraging Genetic Diversity in Maize Breeding // Alden Perkins.
作者:	Perkins, Alden,
面頁冊數:	1 electronic resource (205 pages)
附註:	Source: Dissertations Abstracts International, Volume: 85-07, Section: B.
Contained By:	Dissertations Abstracts International85-07B.
標題:	Plant sciences. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30989599
ISBN:	9798381402537

Leveraging Genetic Diversity in Maize Breeding /
Perkins, Alden,

Leveraging Genetic Diversity in Maize Breeding /Alden Perkins. - 1 electronic resource (205 pages)

Source: Dissertations Abstracts International, Volume: 85-07, Section: B.

Maize (Zea mays L.) cultivars grown in the United States are not closely related to cultivars found in many other parts of the world, and pedigree records suggest that there has been little use of germplasm from other countries in US maize breeding. Exotic germplasm could be a useful source of alleles for improving traits such as grain quality, disease resistance, and abiotic stress tolerance in US populations. Exotic cultivars may also contain alleles that confer adaptation to different climate conditions and management practices, however, which could be detrimental in US growing environments.This dissertation contains a review article about the importance of genetic diversity in breeding and three research projects that involve the incorporation of exotic diversity into US maize germplasm. In the first research project, we investigated the effects of introgressions from open-pollinated populations that originated in Latin America on the performance of maize hybrids in US environments. We compared the phenotypic stability of exotic-derived hybrids and US-adapted hybrids, and we found that the two groups had significantly different stability values for grain yield and flowering time. In the second project, we estimated the effects of exotic introgressions contained in maize populations created by a public-private partnership on grain protein content, kernel vitreousness, and other agronomic traits. One introgression was estimated to increase grain protein content by 0.78%, although it was also associated with detrimental changes in the time of flowering and plant height. Finally, we compared models that could be used to predict the phenotypes of untested hybrids in diverse populations, which could make the process of incorporating new diversity into US germplasm more efficient. We found that models using near-infrared absorbance data collected on inbred seeds as predictors were inferior to models based on genotypic data in most cases, although the difference between the methods was small for traits such as grain moisture and test weight. An alternative to the standard genomic best linear unbiased prediction (GBLUP) method that included additional regularization, called the sparse selection index method, was superior to GBLUP models when large training populations were available. Collectively, the results from these projects provide new insights into how exotic germplasm can be used in US maize breeding most effectively.

English

ISBN: 9798381402537Subjects--Topical Terms:

3173832
Plant sciences.
Subjects--Index Terms:

Breeding

Leveraging Genetic Diversity in Maize Breeding /
LDR:03896nmm a22004333i 4500 001 2400555
005 20250522084153.5
006 m o d
007 cr|nu||||||||
008 251215s2024 miu||||||m |||||||eng d
020 $a 9798381402537
035 $a (MiAaPQD)AAI30989599
035 $a AAI30989599
040 $a MiAaPQD $b eng $c MiAaPQD $e rda
100 1 $a Perkins, Alden, $e author. $3 3770608
245 1 0 $a Leveraging Genetic Diversity in Maize Breeding / $c Alden Perkins.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2024
300 $a 1 electronic resource (205 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: 85-07, Section: B.
500 $a Advisors: de Leon, Natalia Committee members: Dawson, Julie; Ellison, Shelby; Kaeppler, Shawn; Tracy, William.
502 $b Ph.D. $c The University of Wisconsin - Madison $d 2024.
520 $a Maize (Zea mays L.) cultivars grown in the United States are not closely related to cultivars found in many other parts of the world, and pedigree records suggest that there has been little use of germplasm from other countries in US maize breeding. Exotic germplasm could be a useful source of alleles for improving traits such as grain quality, disease resistance, and abiotic stress tolerance in US populations. Exotic cultivars may also contain alleles that confer adaptation to different climate conditions and management practices, however, which could be detrimental in US growing environments.This dissertation contains a review article about the importance of genetic diversity in breeding and three research projects that involve the incorporation of exotic diversity into US maize germplasm. In the first research project, we investigated the effects of introgressions from open-pollinated populations that originated in Latin America on the performance of maize hybrids in US environments. We compared the phenotypic stability of exotic-derived hybrids and US-adapted hybrids, and we found that the two groups had significantly different stability values for grain yield and flowering time. In the second project, we estimated the effects of exotic introgressions contained in maize populations created by a public-private partnership on grain protein content, kernel vitreousness, and other agronomic traits. One introgression was estimated to increase grain protein content by 0.78%, although it was also associated with detrimental changes in the time of flowering and plant height. Finally, we compared models that could be used to predict the phenotypes of untested hybrids in diverse populations, which could make the process of incorporating new diversity into US germplasm more efficient. We found that models using near-infrared absorbance data collected on inbred seeds as predictors were inferior to models based on genotypic data in most cases, although the difference between the methods was small for traits such as grain moisture and test weight. An alternative to the standard genomic best linear unbiased prediction (GBLUP) method that included additional regularization, called the sparse selection index method, was superior to GBLUP models when large training populations were available. Collectively, the results from these projects provide new insights into how exotic germplasm can be used in US maize breeding most effectively.
546 $a English
590 $a School code: 0262
650 4 $a Plant sciences. $3 3173832
650 4 $a Plant pathology. $3 3174872
650 4 $a Genetics. $3 530508
653 $a Breeding
653 $a Genetic diversity
653 $a Germplasm
653 $a Agronomic traits
653 $a Genotypic data
690 $a 0479
690 $a 0369
690 $a 0480
710 2 $a The University of Wisconsin - Madison. $b Plant Breeding & Plant Genetics. $e degree granting institution. $3 3770609
720 1 $a de Leon, Natalia $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 85-07B.
790 $a 0262
791 $a Ph.D.
792 $a 2024
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30989599