EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Exotic cottons gossypium hirsutum as genetic sources for drought resistance


Crop Science 21(6): 889-895
Exotic cottons gossypium hirsutum as genetic sources for drought resistance
Plant (shoot) dry matter accumulation in photoperiodic (exotic) cotton strains under irrigated (water optimal) and dryland (water stressed) field conditions was evaluated, their water-use efficiency under dry land was estimated, and the relationship between field growth parameters, laboratory evaluations of heat tolerance, and greenhouse estimates of root growth were determined. Fifteen photoperiodic strains and 1 commercial cultivar were planted in irrigated and dryland field tests at Big Spring, Texas [USA] and in acrylic tubes in the greenhouse at Temple, Texas. In the Big Spring test, dry weight harvests from both the irrigated and the dryland plots were made at 44, 58, 72, and 86 days after planting (DAP). Soil-water use was measured with a neutron probe in the dryland plots, and leaf discs were taken from both the irrigated and the dryland tests to measure heat tolerance. In the Temple test, shoot dry weight, leaf area, taproot length, and the number of major root laterals were measured 35 DAP. Analyses of variance and regression analyses were used to evaluate the data. Significant variability was demonstrated among entries for shoot dry weights under both irrigated and dryland conditions, for water-use efficiency in the dryland test, for heat tolerance at Big Spring, and for root growth at Temple. The number of lateral roots measured in the greenhouse was positively associated with shoot dry weights in the dryland plots, but not in the irrigated plots. Root morphology and root growth potentials apparently are important traits in the adaptation of cotton to conditions where limited soil-water availability is a major constraint on plant growth.


Accession: 005419234



Related references

Exotic cottons as genetic sources for drought resistance. Crop Science 21(6): 889-895, 1981

New sources of resistance to root knot nematodes meloidogyne incognita among primitive cottons gossypium hirsutum. Crop Science 23(5): 999-1002, 1983

New sources of resistance to bacterial blight in exotic lines of upland cotton (Gossypium hirsutum). Indian Journal of Agricultural Sciences 59(3): 169-170, 1989

Leaf production and growth rates of exotic cottons gossypium hirsutum. Agronomy Journal 76(6): 901-905, 1984

Resistance to the twospotted spider mite in certain Gossypium hirsutum races, Gossypium species, and glanded-glandless counterpart cottons. Journal of Economic Entomology 65(4): 1108-1110, 1972

Genetic improvement of cotton (Gossypium hirsutum L. r. latifolium Hutch) for resistance to drought. II. Tests of Acala del Cerro (S3) progenies and genetic gains made. Boletim de pesquisa Centro Nacional de Pesquisa do Algodao 2(14): 29-33, 1983

Genetic improvement of cotton (Gossypium hirsutum r. latifolium) for resistance to drought. I. Tests of Acala del Cerro progenies. Boletim de pesquisa Centro Nacional de Pesquisa do Algodao 2(14): 23-27, 1983

Identification of sources of resistance among Gossypium hirsutum genetic stocks against cotton leaf curl. Crop Improvement 29(1): 53-57, 2002

Genetic improvement of cotton (Gossypium hirsutum r. latifolium) for resistance to drought. III. Effects of selection on economic and technological characteristics. Boletim de pesquisa Centro Nacional de Pesquisa do Algodao 2(14): 35-40, 1983

Genotype x environment interaction of cottons gossypium hirsutum varying in insect resistance. Crop Science 23(5): 970-973, 1983