Page Banner

United States Department of Agriculture

Agricultural Research Service

Cotton Project overall view
headline bar
 Click on images for larger size
 
Cotton field Recovered Calcium Phosphate from Manure as a Fertilizer for Cotton: We evaluated recovered calcium phosphate from manure as a fertilizer source for cotton. The results indicate recovered calcium phosphate can be relatively easily processed into fertilizer pellets. In a cotton field where conservation tillage is used, small pellets appear superior to large (2-4 mm diameter) ones as a fertilizer material.

Resources
:

Phosphorous Recovered from... (Summary) (PDF)


Cotton boll Identifying Candidate Genes for Improving Cotton’s Performance Under Water Deficit Stress Conditions: Water deficit stress is known to be a major inhibitor of environmentally and economically sustainable cotton production systems. In this report, we identified approximately 500 genes with differential expression in response to water deficit stress. For many of the identified genes, tissue specific expression patterns (root, leaf, or both tissues) were identified. The DNA sequences of these genes were deposited in the GenBank gene sequence database where they are being made available to the scientific community. The genes identified in this report provide a vast collection of candidate genes for improving cotton’s water use efficiency and/or performance under water limited conditions.  

Resources
:

Genome-wide Identification... (Summary)  (PDF) 


Cotton picker in SC field Changing the Negative Relationship between Yield and Fiber Quality Following 70 Years of Cotton Breeding: The Pee Dee cotton germplasm program has developed a unique and diverse collection of high fiber quality germplasm resources that continue to contribute to the development of current commercial cultivars. In this report, we estimated the changes in yield and fiber quality trait correlations within the Pee Dee cotton germplasm program following 70 years of cotton breeding. The research has two important implications for cotton breeders and producers. First, the research shows that the breeding methods used over this time period have substantially lessened the negative relationship between yield and fiber quality. Second, the research provides cotton breeders a list of a few, unique germplasm resources where the negative linkage between high yield and high fiber quality has been eliminated.

Resources
:

Genetic Improvement of the... (Summary)  (PDF)


Dissecting Genotype x Environment... (Summary) (PDF)


  cover of Crop Science 59(4) 2010 Cotton's Global Genetic Resources: The long-term preservation of cotton’s genetic resources serves as a genetic insurance policy for sustainable cotton production systems. The 50 known species of cotton are preserved in genetic resource centers located in eight countries around the world. In collaboration with scientists from these eight countries, ARS scientists at Florence, SC, Mississippi State, MS, and College Station, TX, organized a project to document the status of the world’s cotton genetic resources. Cotton breeders and geneticists can use this information to identify genetic resources that will aid efforts to overcome current and future crop diseases and vulnerabilities, challenges associated with a changing climate, and the development of new and innovative end-use products.  

Resources
:

Status of the Global Cotton... (Summary)  (PDF) 


  cotton plants in drought Discovering Cotton’s Water Channel Genes:  Aquaporin genes, also known as water channel genes, are known to control a large portion of water movement within plant cell membranes. In several plant species, aquaporin genes are used as potential molecular targets to improve plant water use efficiency. In this report, ARS Florence was the first to isolate and sequence the cotton aquaporin gene family. The study isolated 71 genes and determined how the expression of each gene in different plant tissues differed in response to drought conditions. Overall, the study provides a number of potential molecular targets for improving the water use efficiency of cotton. 
 
Resources:

Identification of the Family... (Summary)  (PDF) 


  Cotton field with open bolls Release of Cotton Germplasm Lines: In 2009, ARS Florence in collaboration with ARS College Station, TX, and ARS Stoneville, MS, co-released two sets of Upland cotton germplasm lines with high fiber quality and increased genetic diversity. The lines provide public and private breeders genetic resources for concurrent improvement of fiber quality and yield performance. The lines also serve as genetic resources for expanding the genetic base of cotton.   

Resources
:

Registration of CRB 252... (Summary)  (PDF) 

Registration of Four Exotic Germplasm... (Summary)  (PDF) 


   Close up of cotton boll differences Understanding Variability in Cotton Fiber Properties: Cotton mills require cotton fibers that are long, strong, mature, and uniform for optimal processing efficiency. This study demonstrated that water stress during the season can have a substantial impact on the uniformity of fiber properties among bolls in the canopy. It is also the first study to show how the fiber sugar and salt content (thought to affect yarn quality and fiber processing efficiency) are influenced by the environment during boll growth.

Resources
:

A Comparison of Two Cotton Cultivars... (Summary)  (PDF) 



  Field with two varieties of legumes Summer Legumes for Bioenergy Production: Some legumes grown during late summer in the Southeast can provide a high biomass without any nitrogen fertilizer. We found that a tropical legume, sunn hemp, had high energy content and can provide high energy per hectare. These qualities make it a suitable bioenergy crop candidate for Southeast crop rotations. 

Resources
:

Utilization of Summer Legumes... (Summary)  (PDF) 


Photo showing yellow summer legumes 

Summer Legumes in Cotton Rotations: Cotton rotations that include legumes can significantly reduce the amount of nitrogen fertilizer that needs to be applied to a crop. We evaluated growing sunnhemp and cowpeas the summer before cotton is planted. Sunnhemp is a tropical legume that grows fast and can provide a large amount of nitrogen. We found that growing summer legumes the season before a cotton crop might not be a good plan because of the potential for loss of the nitrogen from the soil during the winter. 

Resources
:

Cotton Production in Rotation...
(Summary)   (PDF) 

Click on images for larger size
 
Get Adobe Acrobat Reader

Last Modified: 11/1/2012
Footer Content Back to Top of Page