| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
a Dep. 436, AP9A/2, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, IL 60064-6124
b Dep. of Agronomy, Univ. of Wisconsin-Madison, 1575 Linden Dr., Madison, WI 53706-1597
c Dep. of Plant Pathology, Univ. of Wisconsin-Madison, 1630 Linden Dr., Madison, WI 53706-1598
Corresponding author (mdcasler{at}facstaff.wisc.edu)
Neutral detergent fiber (NDF) concentration is related to intake potential of forages but might also be related to plant reaction to pathogens. Three smooth bromegrass (Bromus inermis Leyss.) populations from these cycles of uniparental mass selection for low NDF, one cycle of biparental mass selection for high NDF, and the base population were evaluated at high and low disease potentials at three locations for 2 yr and three harvests each year. High disease severity, measured as proportion of foliage diseased, was associated with high NDF and high lignin concentration (on a dry-matter basis and a cell-wall basis). Nevertheless, disease potentials did not affect the relative performance of selection cycles on any traits measured. On average, NDF was reduced 3.5 g kg-1 DM per cycle (P < 0.001) by selection for low NDF, and increased 11.1 g kg-1 DM in one cycle (P < 0.001) by selection for high NDF. For the spring harvest, the response in NDF could partially be attributed to a change in heading index. A positive correlated response in acid detergent lignin was found in the spring (P < 0.001) while a negative correlated response in cell wall lignin was detected in the summer and fall (P < 0.001). Selection for NDF modified the composition of NDF, as cell wall hemicellulose changed in the opposite direction of NDF. Lower dry matter yield per plant appeared to be associated with lower NDF and higher inbreeding. Selection for low NDF, accompanied by slight selection pressure on disease resistance, resulted in a reduction of NDF without an increase in disease susceptibility.
Abbreviations: ADF, acid detergent fiber • ADL, acid detergent lignin • CW, cell wall • NDF, neutral detergent fiber • NIRS, near-infrared reflectance spectroscopy • WSC, water soluble carbohydrate
This article has been cited by other articles:
|
|
 |
|
  M. D. Casler and M. Diaby Positive Genetic Correlation between Forage Yield and Fiber of Smooth Bromegrass Crop Sci., November 24, 2008; 48(6): 2153 - 2158. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. Claessens, R. Michaud, G. Belanger, and D. E. Mather Responses to Divergent Phenotypic Selection for Fiber Traits in Timothy Crop Sci., May 6, 2005; 45(3): 1017 - 1022. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. D. Casler Agricultural Fitness of Smooth Bromegrass Populations Selected for Divergent Fiber Concentration Crop Sci., January 1, 2005; 45(1): 36 - 43. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. D. Casler, M. Diaby, and C. Stendal Heterosis and Inbreeding Depression for Forage Yield and Fiber Concentration in Smooth Bromegrass Crop Sci., January 1, 2005; 45(1): 44 - 50. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. Claessens, R. Michaud, G. Belanger, and D. E. Mather Characteristics of Timothy Genotypes Divergently Selected for Fiber Traits Crop Sci., January 1, 2004; 44(1): 81 - 88. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| The SCI Journals | Agronomy Journal | Vadose Zone Journal | |||
| Journal of Natural Resources and Life Sciences Education |
Soil Science Society of America Journal | ||||
| Journal of Plant Registrations | Journal of Environmental Quality |
The Plant Genome | |||
