scholarly journals Introduction of Australian Diploid Cotton Genetic Variation into Upland Cotton

Crop Science ◽  
2003 ◽  
Vol 43 (6) ◽  
pp. 1999-2005 ◽  
Author(s):  
L. Ahoton ◽  
J.‐M. Lacape ◽  
J.‐P. Baudoin ◽  
G. Mergeai
Keyword(s):  
Genetic Variation ◽  
Upland Cotton ◽  
Diploid Cotton

scholarly journals Identification of novel sources of genetic variation for the improvement of cold germination ability in upland cotton (Gossypium hirsutum)

Euphytica ◽  
2019 ◽  
Vol 215 (11) ◽  
Author(s):  
Junghyun Shim ◽  
Ritchel B. Gannaban ◽  
Benildo G. de los Reyes ◽  
Rosalyn B. Angeles-Shim
Keyword(s):  
Genetic Variation ◽  
Fatty Acid ◽  
Gossypium Hirsutum ◽  
Upland Cotton ◽  
Recombinant Inbred Lines ◽  
Germination Rate ◽  
Saturated Fatty Acids ◽  
Fatty Acid Content ◽  
Genotypic Variation ◽  
Germination Ability

Abstract Upland cotton (Gossypium hirsutum) is inherently susceptible to low temperature stress especially during the early seedling growth and boll maturation stages. The goal of the study is to identify novel sources of genetic variation that can be used to improve cold tolerance of cotton during seed germination. Genetic diversity analysis of thirty accessions from the core Gossypium Diversity Reference Set (GDRS) and twenty recombinant inbred lines derived from intercrossing cotton mutants with altered fatty acid content profiles established genetic variation in the test germplasm based on simple sequence repeat (SSR) genotyping. The mutants clustered in a single clade, whereas the GDRS accessions were separated into four different clades. Screening for germination ability at 12 °C and 15 °C showed that the fatty acid mutants had a significantly better overall germination compared to the GDRS accessions. Hydropriming improved the germination rate and uniformity of the GDRS accessions at 12 °C and 15 °C but not those of the fatty acid mutants, which recorded a better overall germination at 15 °C even without hydropriming. The tolerance of the FA mutants to cold stress during germination is proposed to be conferred by the higher proportion of unsaturated to saturated fatty acids in the mutants compared to the GDRS accessions. Principal component analysis established phenotypic patterns of variation that is consistent with the observed genotypic variation in the test germplasm. Results of the study indicate the potential of the mutants and select GDRS accessions as donors in breeding for cold germination ability.

Genetic Variation in Salt Tolerance during Seed Germination in a Backcross Inbred Line Population and Advanced Breeding Lines Derived from Upland Cotton × Pima Cotton

Crop Science ◽  
2013 ◽  
Vol 53 (5) ◽  
pp. 1974-1982 ◽  
Author(s):  
Rashmi Sharma Tiwari ◽  
Geno A. Picchioni ◽  
Robert L. Steiner ◽  
Sidney E. Hughs ◽  
Don C. Jones ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Salt Tolerance ◽  
Seed Germination ◽  
Inbred Line ◽  
Upland Cotton ◽  
Breeding Lines ◽  
Pima Cotton ◽  
Backcross Inbred Line

Genetic control of some quantitative characters in upland cotton (Gossypium hirsutum L.)

1980 ◽  
Vol 94 (3) ◽  
pp. 539-543 ◽  
Author(s):  
S. S. Dhillon ◽  
T. H. Singh
Keyword(s):  
Genetic Variation ◽  
Negative Correlation ◽  
Environmental Effects ◽  
Upland Cotton ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Gossypium Hirsutum L ◽  
Significant Component ◽  
Quantitative Characters ◽  
Additive Component

SummaryThe nature of genetic variation in an intervarietal cross (J 34 × SS 167) of upland cotton was determined for seed cotton yield, number of bolls, weight of 100 seeds, ginning outturn and halo length. The materials consisted of six generations (P1, P2, F1, B1, B2 and F2) which were raised at two locations. In those cases where the additivedominance model was inadequate, models with different numbers of parameters were applied along with the six-parameter model. A consistent and high negative correlation was observed between [h] and [l], and [i] and [l] in all the models at two locations. Correlation between [d] and [i] was also consistent and negative, but its magnitude was low. Dominance and dominance × dominance, and additive × additive and dominance × dominance components were found to be antagonistic in effects to each other and the interactions observed were of duplicate type, i.e. [h] and [l] had opposite signs.The dominance component fluctuated greatly over models for a particular character at a particular location. Contrary to this the additive component was observed to be important and consistent over models at a particular location for a particular character. Also this was the only significant component involved in the inheritance of all the characters at both the locations. The expression of different components of variation was highly influenced by the environmental effects.

Sign in / Sign up

Export Citation Format

Share Document