Life Sciences Commons^™

Center For Grassland Studies Newsletter, Winter 2007, Volume 13, No. 1

Center for Grassland Studies: Newsletters

Contents

• Restoration of Salt Cedar Infestations

• From the Director

• Patch-burn Grazing: Benefits for Both Wildlife Habitat and Livestock Performance by Chris Helzer

• CGS Associates

• Soil Physical Characteristics of Aging Golf Greens by Roch Gaussoin

• Jim Gerrish to Speak at 2007 Nebraska Grazing Conference

Nebline, Nov./Dec. 2007

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Internet is Popular Way to Access Extension
When it Comes to Being Wired, Youth are Leading the Way
Storage Methods to Reduce Loss of Hay Quality
Grain Stubble Rental Rates
Organic Production
Winter Protection for Roses
Make a Holiday Wreath
Winter Gardening Activities for Kids of All Ages
Turkey Tips
Cheesy Turkey Lasagna Recipe
Mediterranean Diet Offers Healthy Benefits
FREE Seminar, “Making Many Meals Using a Few Ingredients”
Mediterranean Soup
President’s Notes — Alice’s Analysis
Household Hints: Caring for Fleece
The Holidays When There are No Close Family Ties
FCE News & Events
Holiday Safety Tips
Holiday Gifts Needed for …

Wheat Streak Mosaic Virus Lacking Helper Component-Proteinase Is Competent To Produce Disease Synergism In Double Infections With Maize Chlorotic Mottle Virus, Drake C. Stenger, Brock A. Young, Feng Qu, Thomas Jack Morris, Roy French

Department of Plant Pathology: Faculty Publications

The tritimovirus Wheat streak mosaic virus (WSMV) and the machlomovirus Maize chlorotic mottle virus (MCMV) each cause systemic chlorosis in infected maize plants. Infection of maize with both viruses produces corn lethal necrosis disease (CLND). Here, we report that complete deletion of the WSMV helper component-proteinase (HC-Pro) coding region had no effect on induction of CLND symptoms following coinoculation of maize with WSMV and MCMV. We further demonstrated that elevation of virus titers in double infections, relative to single infections, also was independent of WSMV HC-Pro. Thus, unlike potyvirus HC-Pro, WSMV HC-Pro was dispensable for disease synergism. Because disease synergism …

Center For Grassland Studies Newsletter, Fall 2007, Volume 13, No. 4

Center for Grassland Studies: Newsletters

Contents:

Turfgrass and Landscape Management Degree Program at UNL by Robert (Bob) C. Shearman, Department of Agronomy and Horticulture, UNL

New Farm Bill Should Continue Support for Grassland Management by Duane Hovorka, National Wildlife Federation

Another Great Nebraska Grazing Conference in 2007!

New Ph.D. Specialization in Applied Ecology at UNL by Tala Awada, James Brandle and Larkin Powell, School of Natural Resources, UNL

Nebraska Mentoring Program for Graziers by Roger Chesley, Nebraska Grazing Lands Coalition

2003 National Resources Inventory Information Online

2007 CGS Fall Seminar Series

Nebline, October 2007

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

How Healthy is Your Home?
Soybean Cyst Nematode Spreading in Nebraska
Maintain Grain Quality in Storage
Winterize Your Underground Sprinkler System
Prepare Fireplaces and Woodburning Stoves for Safe Use this Winter
Why Leaves Fall
Choose Decay Resistant Wood for Buildings, Fenceposts
Storing a Tractor
Drying Gourds
Start Garden Cleanup
Tree Planting and Landscape Improvement Funds Available
Grassland Center Sets Fall Lecture Schedule
President’s Notes — Alice’s Analysis
Household Hints
Control Anger Rather Than Suppress It
FCE News & Events
Respond Effectively to Misbehaving Children by Understanding the Problem
Filing Financial Records Saves Time
How Dish Size, Location Influence the Amount …

Nebline, September 2007

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Control Winter Annuals in Fall
Free Soybean Cyst Nematode Sample Kits Available
Free Scrap Tire Collection
Keep Roosting Birds From Dirtying Cars, Driveways This Fall
Wood Heat–A Viable Home Heating Alternative
Ten Rules for Planting Trees
Answers to Composting Questions
President’s Notes — Alice’s Analysis
Household Hints: Programmable Thermostats
FCE News & Events
First Step to Eliminate Debt is Cut Expenses
Ease Children Into Staying Home Alone
Strengthening Family Treasures Daughter/Mother Camp
Four Fruit Salad Recipe
Do You REALLY Know How Much You Eat?
ABC’s for Good Health, Oct. 2, 9 & 23
Free Seminar, “Making Many Meals Using a …

Nebline, August 2007

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Salute to County Fair Volunteers
Volunteers Needed
Controlling Algae in Ponds and Lakes
Pesticide Container Recycling Program
Larger Diameter Bins Can Save Time and Energy When Drying Grain
Scrap Tire Collection
It’s Time to Take Precautions to Avoid West Nile Virus
Effective Mosquito Repellents
The Limitations of Aerosol Insecticides
Bark Stripping by Fox Squirrels
Walking off Midway Munchies
Skillet Zucchini with Chopped Tomatoes Recipe
Sneak Some Zucchini onto Your Neighbor’s Porch Day
The Power of Colors
President’s Notes — Alice’s Analysis
Household Hints: Cleaning Silver by Electrolysis
FCE News & Events
Back to School Tips
Women & Money Conference, Aug. …

Factors Influencing Desire For Increased Wildlife Habitat Among Tennessee Farmers And The Economics Of Switchgrass Production, Janet Jones

Masters Theses

In order to keep up with a growing human population, wildlife habitat has had to be relinquished. Modern technology has furthered the abilities of commodity producers but caused a deterioration of the quality and quantity of habitat available for wild animals in many cases. Many species of wildlife have left areas of the state in order to meet their basic needs. In order to increase wildlife numbers, wildlife habitat will have to be reintroduced or managed differently. The first objective of this research is to identify and evaluate the factors associated with a demand for increased wildlife habitat among Tennessee …

Sheep Updates 2007 - Part 1, Richard Gunner, Anthony Clarke, Kevin Bell, Hugh Dove, H. M. Burrow, Kevin Goss

Sheep Updates

This session covers six papers from different authors:

PLENARY

1. Life beyond the farmgate - the meat perspective, Richard Gunner – Principal:- Richard Gunner’s Fine Meats

2. Do you need to worry about climate change?, Anthony Clark, Centre for Resource and Environmental Studies, Australian National University and Bureau of Rural Sciences.

3. Ruminant nutrition panel session - The impact of nutrition on animal health and welfare, Kevin Bell, School of Veterinary and Biomedical Studies, Murdoch University

4. Ruminant nutrition panel session - Pasture/animal interactions, Hugh Dove, Chief Research Scientist, CSIRO Plant Industry

5. Precision Cattle Breeding for …

Sheep Updates 2007 - Part 5, Bindi Murray, John Karlsson, Johan Greeff, Carolina Viñoles Gil, B. L. Paganoni, K. M. M. Glover, J. T. B. Milton, G. B. Martin, Hugh Dove, Bill Mckiernan, John Wilkins, Paul Greenwood, Linda Cafe

Sheep Updates

This session covers six papers from different authors:

GENETIC IMPROVEMENT

1. Breech Strike Resistance: Selecting for resistance traits reduces breech strike, Bindi Murray, John Karlsson, Johan Greeff, Department of Agriculture and Food, Western Australia

2. Breeding Merino Sheep for Worm Resistance increases profit in a Mediterranean Environment, John Karlsson and Johan Greeff Department of Agriculture and Food, Western Australia

FEEDING

3. Embryo lasses were not increased when Merino ewes that had lost weight were supplemented with lupins, C. Viñoles Gil, B.L. Paganoni, K.M.M. Glover, J.T.B. Milton & G.B. Martin, School of Animal Biology, Faculty of Natural and Agricultural Sciences, …

Sheep Updates 2007 - Part 3, Andrew Ritchie, Edward Riggall, James Hall, Gus Rose, Johan Greeff, John Young, M. Alchin, M. Young, T. Johnson, John Lucy, Martin Staines, Tim Wiley, Rob Grima, Sandra Prosser, Matt Ryan, Geoff Moore, Tony Albertsen, Phil Barrett-Lennard, George Woolston, John Titerington, Sarah Knight, Brianna Peake

Sheep Updates

This session covers seven papers from different authors:

PROFITABILITY

1. Benchmarking demonstrates both the potential and realised productivity gains in the sheep and wool industry, Andrew Ritchie, Edward Riggall and James Hall, ICON Agriculture, Darkan

2. Improving sheep genetics will increase farm profitability, Gus Rose, Johan Greeff Department of Agriculture and Food Western Australia, John Young Farming Systems Analysis Service, WA

3. Meat, Merinos and making money in WA Pastoral Zone, M. Alchin, M. Young and T. Johnson, Department of Agriculture and Food Western Australia,

GRAZING

4. Nitrogen - farmers' friend or foe? John Lucy and Martin Staines, Department …

Sheep Updates 2007 - Part 4, Dean Thomas, Dominique Blache, Dean Revell, Hayley Norman, Phil Vercoe, Zoey Durmic, Serina Digby, Di Mayberry, Megan Chadwick, Martin Sillence, David Masters, R. Silberstein, F. Byrne, P. G. H. Nichols, J. Young, L. Aitkins, M. G. Wilmot, A. J. Rintoul, T. Lambert, D. R. Mcclements, P. Raper, P. Ward, C. Walton, T. York, David Pethick, David Hopkins, Malcolm Mcphee, D. B. Savage, J. V. Nolan, I. R. Godwin, A. Aoetpah, T. Nguyen, N. Baillie, C. Lawler, Ken Geenty, John Smith, Darryl Smith, Tim Dyall, Grant Uphill, John Young, Michael Paton, John Dorrian

Sheep Updates

This session covers eight papers from different authors:

GRAZING

1. The impact of high dietary salt and its implications for the management of livestock grazing saline land, Dean Thomas, Dominique Blache, Dean Revell, Hayley Norman, Phil Vercoe, Zoey Durmic, Serina Digby, Di Mayberry, Megan Chadwick, Martin Sillence and David Masters, CRC for Plant-based Management of Dryland Salinity, Faculty of Natural & Agricultural Sciences, The University of Western Australia, WA.

2. Sustainable Grazing on Saline Lands - outcomes from the WA1 research project, H.C. Norman^1,2, D.G. Masters^1,2, R. Silberstein^1,2, F. Byrne^2,3, P.G.H. Nichols …

Center For Grassland Studies Newsletter, Summer 2007, Volume 13, No. 3

Center for Grassland Studies: Newsletters

Contents:

Managing the Meeting of the Cow and the Grass by Pat Reece, Department of Agronomy and Horticulture, Panhandle Research and Extension Center, UNL, Scottsbluff

A Prairie Green Roof by Richard Sutton, Departments of Landscape Architecture and Agronomy and Horticulture, UNL

Carbon Sequestration Pilot Project Wraps Up Steve Chick, USDA - Natural Resources Conservation Service, Lincoln, NE

CGS Council Tours North Central Nebraska

The Nature Conservancy Expands Its Scope

Restored Wetlands Capture Missouri River Water Reducing Flooding

Nebline, July 2007

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Beneficial Insects in the Yard & Garden
Backyard Farmer’ Offers How-to Video on Tomatoes
What is that Bump on the Tree Leaves?
Black Knot on Plums
Saved From the Birds—Rescue of a Baby Owl
Raptor Recovery Nebraska
Pine Wilt Disease
How to Sample for Pinewood Nematode
Pine Species to Avoid Planting
Pesticide Container Recycling Program
Scrap Tire Collection
Mosquitoes
Mole Control
Calculating Water Volume
Test Water for Toxic Algae to Prevent Illness
Food and Fun at the Farmers’ Market
Tomato, Cucumber and Red Onion Salad with Mint Recipe
$ave Time & Money by Planning Meals
Focus on Watermelon
President’s Notes …

Nebline, June 2007

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Agricultural Production is $71 Million Industry in Lancaster County
Longtime Farmer Reflects on How Farming Has Changed in Lancaster County
New State Law Changed Fence Viewer Process
Think Ahead, Prepare Bins Before Wheat Harvest
Pesticide Container Recycling Program
Preventing Tick Bites
Store Drinking Water In Case Of Emergency
Check Property For Unused Wells To Avoid Contaminated Drinking Water
Practice Safe Cooking and Food Handling When Grilling
Strawberry Yogurt Shake Recipe
Water is Body’s Most Essential Nutrient
President’s Notes — Alice’s Analysis
Household Hints: To Clean a Sleeping Bag
FCE News & Events
Grandparents Raising Grandchildren
Pack Smart for Summer Vacation …

Pseudomonas Avr And Hop Proteins, Their Encoding Nucleic Acids, And Use Thereof, James R. Alfano, Alan Collmer, Samuel W. Cartinhour, David J. Schneider

Department of Plant Pathology: Faculty Publications

One aspect of the present invention relates to isolated nucleic acid molecules encoding avirulence proteins or polypeptides of Pseudomonas syringae pv. syringae DC 3000, or nucleic acid moleculues which are complementary thereto. Expression vectors, host cells, and transgenic plants which include the DNA molecules of the present invention are also disclosed. Another aspect relates to the isolated proteins or polypeptides and compositions containing the same. The various nucleic acid molecules and proteins of the present invention can be used to impart disease resistance to a plant, make a plant hypersusceptible to colonization by nonpathogenic bacteria, modify a metabolic pathway in …

Center For Grassland Studies Newsletter, Spring 2007, Volume 13, No. 2

Center for Grassland Studies: Newsletters

Contents

• Using Dried Distillers Grains to Substitute for Forage and Nitrogen Fertilizer: Nitrogen Dynamics and Use Efficiency by Matt Greenquist and Terry Klopfenstein

• From the Director

• 2007 Nike Golf Camp in Lincoln This July.

• Did You Know There Is an Environmental Institute for Golf?

• Program for 2007 Nebraska Grazing Conference

• Group Studies Great Plains Fire History by Charles Flowerday

• Summer Fire and Post-Fire Grazing Management by Lance Vermeire

Nebline, May 2007

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Youth/Adult Partnership is Key to Success of 4-H Horse Program
Remove Skunk Odor by Deodorizing, Neutralizing Home, Clothing
Select Shade Trees to Meet Personal Landscape Objectives
Take Steps to Reduce Severe Weather Damage on Homes
Low-Toxic Fly Management for Horses
UNL Researcher Seeks Alfalfa Fields to Study Pocket Gophers
Household Hazardous Waste Collections
Termite Workshops for Homeowners in May
Food Quiz: Keep or Toss?
Cleaning Fruits and Veggies
Thawing Frozen Foods
Carrots and Raisins Sunshine Salad Recipe
The First Step to Food Safety — Clean!
Download FREE Educational Materials Online!
President’s Notes — Alice’s Analysis
Household Hints: Removing After-Prom Stains …

The Development Of A Gc/Ms Protocol For The Analysis Of Polysaccharides In Echinacea Purpurea, Michaela Knapp

Undergraduate Theses and Capstone Projects

Echinacea purpurea is an herbal supplement used to reduce symptoms of common colds and flu-like illnesses. As of right now, it is not well understood what chemical components in the plant are immunologically active. The four main potentially immunologically active chemical components in E. purpurea are caffeic acid derivatives, alkamides, polyacetylenes, and polysaccharides. In this investigation, a protocol was developed in an attempt to identify polysaccharides present in Puritan’s Pride E. purpurea (aerial) “non-irradiated” herbal supplement First, an estimate of the crude total polysaccharide content in Puritan’s Pride and in a ChromaDex certified botanical standard (E. purpurea -powdered root) was …

Nebline, April 2007

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

UNL Extension Programs Have Improved Termite Treatments in Nebraska
2007 Perennial Plant of the Year
Gardening Trends in 2007
Easter Lily Care
Spring is a Good Time to Begin Herb Gardening
“Management of Small Ponds” Clinic, April 17
Arbor Day and Tree Planting are Nebraska Traditions
Container Gardening
Controlling Nuisance Weeds in Your Farm Pond
Teff – A New Annual Forage Grass
Simplified Hand-Held Sprayer Calibration
Cost of Pumping Water for Domestic and Acreage Needs
Commercial Pesticide Applicator Initial Training, April 19
It’s Springtime: Watch for Signs of Termites
Termite Workshops for Homeowners in May
What’s Bugging You?
Spring Cleaning? …

Nebline, March 2007

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

$pending YOUR Calorie $alary: Tips for Using MyPyramid
All-America Selections Flower and Vegetable Award Winners for 2007
Planting Asparagus
Alternative Agriculture Provides Opportunities For Enthusiastic Entrepreneur
Proper Precautions for Chain Saw Safety
Collection of Unwanted Pesticides, March 23
Computerized Farm Financial Recordkeeping, March 19
Upcoming Pesticide Applicator Trainings
Use Pheromone Traps to Locate Indian Meal Moths Infestations
ewf needs volunteers
Build a Bat House
Fertilizing Crop Land with Biosolids
Potential Benefits and Hazards of Bats
Food Safety: What You Don’t Know CAN Hurt You
Ground Beef Vegetable Soup with Rice Recipe
$hop $mart to $tretch Your Food Dollar
Add Acidic …

Nebline, February 2007

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Private Well Management During a Drought
Some Wells in Lancaster County Have Dried Up
Groundwater-level Changes in Nebraska — Drought from Spring 2000 to Spring 2006
Computerized Farm Financial Recordkeeping Workshop, March 19
Manage Stored Grain Temperature with Aeration
Upcoming Pesticide Applicator Trainings
Estimating Water Needs When Planning for a New Well
Have a Healthy, Happy Valentine’s Day with Children!
Triple Play Walnut Crunch Recipe
Pack Power Lunches
Candy Placement May Determine How Much You Eat
President’s Notes — Alice’s Analysis
Household Hints: Keeping Comforters Clean and Cozy
FCE News & Events
Strengthening Family Treasures Daughter/Mother Camp
Clearing Out and …

Association Of Ergot Alkaloids With Conidiation In Aspergillus Fumigatus, Christine M. Coyle, Shawn C. Kenaley, William R. Rittenour, Daniel G. Panaccione

Department of Plant Pathology: Faculty Publications

Ergot alkaloids are mycotoxins that affect the nervous and reproductive systems of exposed individuals through interactions with monoamine receptors. They have been studied more widely in ergot fungi and grass endophytes but also are found in Aspergillus fumigatus, an opportunistic human pathogen that reproduces and disseminates exclusively through conidia. The ergot alkaloids festuclavine and fumigaclavines A, B and C are present in or on conidia of A. fumigatus. Cultures of the fungus that are free of conidia are difficult to obtain, obscuring comparisons of conidia versus vegetative hyphae as sources of the ergot alkaloids. To create conidiation-deficient strains of A. …

Expression Analysis Of Rice Defense-Related Genes In Turfgrass In Response To Magnaporthe Grisea, Young-Ki Jo, Guo-Liang Wang, Michael J. Boehm

Department of Plant Pathology: Faculty Publications

Magnaporthe grisea (anamorph = Pyricularia grisea) causes blast on rice (Oryza sativa) and gray leaf spot on turfgrass. Gray leaf spot is a serious disease on St. Augustinegrass (Stenotaphrum secundatum), perennial ryegrass (Lolium perenne), and tall fescue (Festuca arundinacea). Virulence assays performed in this study revealed that M. grisea collected from rice could also cause disease on St. Augustinegrass and tall fescue. One rice isolate, Che86061, caused similar disease reactions on susceptible cultivars of rice and St. Augustinegrass and an incompatible interaction on resistant cultivars of both species. To explore whether …

Genetic Diversity In Populations Of Xanthomonas Campestris Pv. Campestris In Cruciferous Weeds In Central Coastal California, A. Ignatov, A. Sechler, E. L. Schuenzel, I. Agarkova, B. Oliver, A. K. Vidaver, N. W. Schaad

Department of Plant Pathology: Faculty Publications

Xanthomonas campestris pv. campestris (X. campestris) infects a large number of cruciferous plants, including weeds. California has one of the largest and most diverse populations of wild cruciferous plants in the world. Although considerable information is available on the genetic diversity of X. campestris in commercial crop plants, nothing is known about the diversity in strains infecting weeds. To assess the genetic diversity among strains of X. campestris in weeds in noncultivated and cultivated areas, strains of the pathogen were isolated from populations of cruciferous weeds growing in coastal valley crop-production sites and from remote nonproduction sites along the …

Response Of Soybean Cultivars To Bean Pod Mottle Virus Infection, Amy D. Ziems, Loren J. Giesler, George L. Graef, Margaret G. Redinbaugh, Jean L. Vacha, Sueann Berry, Laurence V. Madden, Anne E. Dorrance

Department of Plant Pathology: Faculty Publications

Bean pod mottle virus (BPMV) has become increasingly common in soybean throughout the north-central region of the United States. Yield loss assessments on southern soybean germplasm have reported reductions ranging from 3 to 52%. Currently, no soybean cultivars have been identified with resistance to BPMV. The objective of this study was to determine the impact of BPMV infection on soybean cultivars representing a broad range of northern soybean germplasm by comparing inoculated and noninoculated soybean plants in paired row studies. In all, 30 and 24 cultivars were evaluated in Nebraska (NE) in which soybean plants were inoculated at the V3 …

Free-Living Dorylaimid Nematodes From Nature Reserves In Costa Rica. The Genus Pachydorylaimus Siddiqi, 1983, A. Esquivel, P. Guerrero, R. Peña-Santiago, Thomas O. Powers

Department of Plant Pathology: Faculty Publications

A taxonomic study of three species, two known and one new, belonging to the genus Pachydorylaimus Siddiqi, 1983 from natural areas in Costa Rica is presented. Pachydorylaimus holovachovi sp. n. is described and can be distinguished by its body 0.90-1.00 mm long, lip region 14-17 μm wide, odontostyle 13-15 μm long, odontophore morphology with differentiated hyaline spindle-shaped area surrounding its junction to pharyngeal lining but lacking distinct basal flanges, total stylet length 35- 44 μm, pars refringens vaginae absent, V = 43-47, female tail straight and tapering to an acute tip (57- 78 μm, c = 12.5-15.8, c’ = 2.0-3.0), …

Basa Regulates Cell Wall Organization And Asexual/Sexual Sporulation Ratio In Aspergillus Nidulans, Shaojie Li, Dapeng Bao, Gary Yuen, Steven D. Harris, Ana M. Calvo

Department of Plant Pathology: Faculty Publications

Sphingolipid C4 hydroxylase catalyzes the conversion of dihydrosphingosine to phytosphingosine. In Saccharomyces cerevisiae, Sur2 is essential for sphingolipid C4 hydroxylation activity but not essential for normal growth. Here we demonstrate that the Aspergillus nidulans Sur2 homolog BasA is also required for phytosphingosine biosynthesis but is also essential for viability. We previously reported that a point missense mutation in basA resulted in aberrant cell wall thickening. Here our data suggest that accumulation of dihydrosphingosine is responsible for this phenotype. In addition, two different mutations in basA consistently accelerated the transition from asexual development to sexual development compared to the wild-type …

Regulation Of Hyphal Morphogenesis By Cdc42 And Rac1 Homologues In Aspergillus Nidulans, Aleksandra Virag, Maurice P. Lee, Haoyu Si, Steven D. Harris

Department of Plant Pathology: Faculty Publications

The ability of filamentous fungi to form hyphae requires the establishment and maintenance of a stable polarity axis. Based on studies in yeasts and animals, the GTPases Cdc42 and Rac1 are presumed to play a central role in organizing the morphogenetic machinery to enable axis formation and stabilization. Here, we report that Cdc42 (ModA) and Rac1 (RacA) share an overlapping function required for polarity establishment in Aspergillus nidulans. Nevertheless, Cdc42 appears to have a more important role in hyphal morphogenesis in that it alone is required for the timely formation of lateral branches. In addition, we provide genetic evidence …

Fertility Restoration Of The Sorghum A3 Male-Sterile Cytoplasm Through A Sporophytic Mechanism Derived From Sudangrass, Hoang V. Tang, Jeffrey F. Pedersen, Christine D. Chase, Daryl R. Pring

Department of Agronomy and Horticulture: Faculty Publications

Fertility restoration of sorghum [Sorghum bicolor (L.) Moench] lines carrying the IS1112C (A3 group) male-sterile cytoplasm has been documented as a two-gene gametophytic mechanism involving complementary action of restoring alleles designated Rf3 and Rf4, as derived from IS1112C. Fertility restoration capability has also been reported from sudangrass (S. bicolor subsp. drummondii) populations. We describe characteristics of a fertility restoration system derived from sudangrass, in which male-sterile individuals were observed at high frequency in backcross and F2-F3 segregating populations. Segregation analyses were consistent with a sporophytic restoration system involving two complementary genes. Pollen iodine staining in fertile …