國立虎尾科技大學 |

New Approaches for Rapid Adaptation of Tropical Maize to Temperate Environments.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	New Approaches for Rapid Adaptation of Tropical Maize to Temperate Environments./
作者:	Choquette, Nicole Eileen.
面頁冊數:	1 online resource (233 pages)
附註:	Source: Dissertations Abstracts International, Volume: 85-01, Section: B.
Contained By:	Dissertations Abstracts International85-01B.
標題:	Plant sciences. -
電子資源:	click for full text (PQDT)
ISBN:	9798379870904

New Approaches for Rapid Adaptation of Tropical Maize to Temperate Environments.
Choquette, Nicole Eileen.

New Approaches for Rapid Adaptation of Tropical Maize to Temperate Environments. - 1 online resource (233 pages)

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

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

Includes bibliographical references

To maintain food security in the face of climate change and a growing population, breeders will need to employ novel strategies to maintain consistent production increases. Increasing genetic diversity through incorporating exotic germplasm into breeding programs may be a strategy to overcome these challenges. Exploiting these exotic resources could create climate resilient varieties, however, poor adaptation of exotic germplasm remains a barrier to integrating them in breeding programs.In Chapter 1, I review the importance of maize and incorporating genetic diversity in maize breeding programs. Additionally, I discuss the genetic architecture of flowering time in maize as well as the carotenoid synthesis pathway. Finally, I end this chapter by reviewing the importance of the response to selection and plant breeding methods such as genomic selection to increase the response to selection per unit time.In Chapter 2, I attempt to understand phenological adaptation of tropical maize to temperate U.S. through using multi-generational selection starting from a common tropical population at eight field sites across a latitudinal transect. All selection lineages were evaluated in a common garden at all original selection locations, allowing for the estimation of specific selection location and evaluation location responses to selection for flowering time and many other traits. These findings demonstrate how tropical germplasm can be incorporated into temperate breeding programs.In Chapter 3, I test ways to adapt two tropical maize populations more quickly to temperate U.S. using genomic selection in an off-season winter nursery in addition to phenotypic selection in the target environment. Positive prediction abilities demonstrate that genomic selection models trained on target environment phenotypes can utilized in the off-season winter nursery to reduce the time for phenotypic adaptation. Greater prediction ability in genomic predictions than winter flowering phenotypes indicate the potential to use genomic selection for adaptational breeding.In Chapter 4, I explore the genetic basis of an abnormal yellow variant appearing in a white-seeded tropical maize population. My results identify a possible candidate gene for the yellow variant that has not been previously shown to contribute to kernel color in maize. Additionally, I discuss further experiments to test our hypothesis of this gene contribution to kernel color.

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

Mode of access: World Wide Web

ISBN: 9798379870904Subjects--Topical Terms:

1179743
Plant sciences.
Index Terms--Genre/Form:

554714
Electronic books.

New Approaches for Rapid Adaptation of Tropical Maize to Temperate Environments.
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