Persistent Link:
http://hdl.handle.net/10150/291580
Title:
Persistence and productivity in nondormant alfalfa
Author:
Hotchkiss, Jay Robert, 1963-
Issue Date:
1991
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Mortality is substantial in alfalfa stands and may be due to random and natural selection. The effects of selection for persistence on single-plant yield are not well understood. This study examined relationships between yield, nonstructural carbohydrates (TNC), and other agronomic characteristics, and persistence in nondormant alfalfa. S₁ progenies were produced on 60 plants dug from a five-yr-old field of 'CUF-101' (Persistent population) in central AZ and 60 greenhouse-grown CUF-101 plants (Random population). Progenies were sown in a replicated field trial at Tucson, AZ in Oct. 1989. Spring and fall forage yield was significantly lower in the Persistent population than in the Random population. Rate of stem regrowth following harvest was also lower in the Persistent population. S₁ progenies from the Persistent population contained approximately 7.1% more TNC in roots and crowns than the Random population, suggesting that TNC and persistence may be positively correlated. These data suggest that plants in the Persistent population exhibited more conservative growth patterns and that a negative genetic correlation may exist between single-plant yield and persistence. Simultaneous selection for traits associated with productivity and persistence may be necessary.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Agriculture, Agronomy.; Biology, Genetics.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Plant Sciences
Degree Grantor:
University of Arizona
Advisor:
Smith, Steven E.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titlePersistence and productivity in nondormant alfalfaen_US
dc.creatorHotchkiss, Jay Robert, 1963-en_US
dc.contributor.authorHotchkiss, Jay Robert, 1963-en_US
dc.date.issued1991en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractMortality is substantial in alfalfa stands and may be due to random and natural selection. The effects of selection for persistence on single-plant yield are not well understood. This study examined relationships between yield, nonstructural carbohydrates (TNC), and other agronomic characteristics, and persistence in nondormant alfalfa. S₁ progenies were produced on 60 plants dug from a five-yr-old field of 'CUF-101' (Persistent population) in central AZ and 60 greenhouse-grown CUF-101 plants (Random population). Progenies were sown in a replicated field trial at Tucson, AZ in Oct. 1989. Spring and fall forage yield was significantly lower in the Persistent population than in the Random population. Rate of stem regrowth following harvest was also lower in the Persistent population. S₁ progenies from the Persistent population contained approximately 7.1% more TNC in roots and crowns than the Random population, suggesting that TNC and persistence may be positively correlated. These data suggest that plants in the Persistent population exhibited more conservative growth patterns and that a negative genetic correlation may exist between single-plant yield and persistence. Simultaneous selection for traits associated with productivity and persistence may be necessary.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectAgriculture, Agronomy.en_US
dc.subjectBiology, Genetics.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplinePlant Sciencesen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorSmith, Steven E.en_US
dc.identifier.proquest1344017en_US
dc.identifier.bibrecord.b26917312en_US
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