scholarly journals Natural crossing and isolation distance between cotton genotypes in turkey

2008 ◽  
Vol 65 (3) ◽  
pp. 314-317 ◽  
Author(s):  
Taner Bozbek ◽  
Nedim Ozbek ◽  
Volkan Sezener ◽  
Oktay Erdogan ◽  
Ilkay Yavas ◽  
...  
Keyword(s):  
Gossypium Hirsutum ◽  
Genetic Marker ◽  
Honey Bee ◽  
Genetic Markers ◽  
Leaf Traits ◽  
Insect Species ◽  
Gossypium Hirsutum L ◽  
Cotton Genotypes ◽  
Isolation Distance ◽  
Natural Crossing

The purposes of this study were to determine the percentage of out-crossing, isolation distance and pollinator insect species for cotton (Gossypium hirsutum L.) seed production in the Aydin region in Turkey. The glandless and red-leaf traits in G. hirsutum were used as genetic markers. Two experiments were conducted over two years that monitored out-crossing in adjacent rows and adjacent plants and established that the percentage of out-crossing varied. The percentage of out-crossing varied between 0% and 13.3% depending on the genetic marker. In the experiment to determine isolation distance, natural crossing percentage was not observed in 2002, while this percentage was 0.8% in the first rows in 2003. In this study, cotton fields were also visited once a week during flowering periods for seven weeks in order to determine the numbers of pollinator insect species, where the only detected species was the honey bee. The numbers of pollinator insects were 2.14% (2002) and 1.30% (2003) for adjacent rows; 1.71% (2002) and 2.00% (2003) for adjacent plants in glandless parcels. It is recommended that the isolation distance between genotypes should be approximately 1 m.

Natural crossing in cotton (Gossypium hirsutum L.)

2000 ◽  
Vol 51 (8) ◽  
pp. 979 ◽  
Author(s):  
F. P. Xanthopoulos ◽  
U. E. Kechagia
Keyword(s):  
Gossypium Hirsutum ◽  
Genetic Markers ◽  
Marker Gene ◽  
Leaf Traits ◽  
Cotton Field ◽  
Gossypium Hirsutum L ◽  
The Mean ◽  
Natural Crossing

The extent of natural crossing in cotton (Gossypium hirsutum L.) was studied in 2 experiments conducted in Greece during 1998 and 1999, using glandless and red-leaf traits as genetic markers. The glandless line was planted in the middle, and the red-leaf both in the middle and the corners, of a commercial cotton field. In the first experiment where estimation of natural crossing was based upon gland status, the percentage ranged from 1.67% to 2.67% in adjacent rows, dropped to 1.42% in plants 2 m apart, and declined to almost zero after 10 m. In the second experiment, where the red-leaf marker gene was used, the mean of natural crossing was 3.85% in adjacent rows, fell to 2.79% in plants 2 m apart, and progressively diminished to 0.31% after 10 m. The mean natural outcrossing in different rows was almost the same in both experiments at the middle of the field and was actually double at the corners. Differences in the extent of natural crossing between the middle and the corners of the field continued to be significant up to 4 m distance. In all cases, distances greater than 10 m among cottons were sufficient to minimise out-crossing ranges.

Assessing the Out-crossing Ratio, Isolation Distance and Pollinator Insects in Cotton (Gossypium hirsutum L.)

2004 ◽  
Vol 3 (6) ◽  
pp. 724-727 ◽  
Author(s):  
Ihsan Sen ◽  
Mustafa Oglakci . ◽  
Yuksel Bolek . ◽  
Bekir Cicek . ◽  
Nefi Kisakurek . ◽  
...  
Keyword(s):  
Gossypium Hirsutum ◽  
Gossypium Hirsutum L ◽  
Isolation Distance

scholarly journals ESTRATÉGIAS DE MANEJO DO DÉFICIT HÍDRICO EM FASES FENOLÓGICAS DO ALGODOEIRO COLORIDO

Irriga ◽  
2020 ◽  
Vol 25 (4) ◽  
pp. 656-662
Author(s):  
Lauriane Almeida dos Anjos Soares ◽  
KAROLINE MARIA MENDES DIAS ◽  
HEMILE MACHADO NASCIMENTO ◽  
GEOVANI SOARES DE LIMA ◽  
KELDER JOSÉ ALVES DE OLIVEIRA ◽  
...  
Keyword(s):  
Gossypium Hirsutum ◽  
Water Deficit ◽  
Irrigated Agriculture ◽  
Limiting Factor ◽  
Gossypium Hirsutum L ◽  
Root Shoot Ratio ◽  
Colored Cotton ◽  
Cotton Genotypes ◽  
E Mail ◽  
Phenological Phases

ESTRATÉGIAS DE MANEJO DO DÉFICIT HÍDRICO EM FASES FENOLÓGICAS DO ALGODOEIRO COLORIDO     LAURIANE ALMEIDA DOS ANJOS SOARES1; KAROLINE MARIA MENDES DIAS2; HEMILE MACHADO NASCIMENTO3; GEOVANI SOARES DE LIMA4; KELDER JOSÉ ALVES DE OLIVEIRA5 E SAULO SOARES DA SILVA6   1 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected] 2 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected]. 3 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected] 4 Unidade Acadêmica de Engenharia Agrícola, Universidade Federal de Campina Grande, UFCG, Rua Aprígio Veloso, 882 -Universitário, Campina Grande, PB, Brasil. E-mail: [email protected] 5 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected] 6 Unidade Acadêmica de Engenharia Agrícola, Universidade Federal de Campina Grande, UFCG, Rua Aprígio Veloso, 882 -Universitário, Campina Grande, PB, Brasil. E-mail: [email protected]     1 RESUMO   A escassez hídrica é um fator limitante para a agricultura irrigada, principalmente em algumas fases do algodoeiro, afetando os processos fisiológicos e consequentemente a produtividade. Neste contexto, objetivou-se com este trabalho avaliar a fitomassa e os componentes de produção de genótipos de algodoeiro colorido sob déficit hídrico nas diferentes fases de fenológicas da planta. As plantas foram conduzidas em lisímetros sob condições de campo, no Centro de Ciências e Tecnologia Agroalimentar pertencente à Universidade Federal de Campina Grande, na cidade de Pombal-PB. O delineamento utilizado foi em blocos ao acaso em esquema fatorial 3 x 3, sendo três genótipos de algodão de fibra colorida (BRS Rubi, BRS Topázio e BRS Safira) irrigados sob déficit hídrico durante as três fases de desenvolvimento da cultura (vegetativa, floração e frutificação). A relação raiz/parte aérea é mais sensível aos efeitos do déficit hídrico na fase de floração e formação dos capulhos. Dentre os genótipos o BRS Topázio é o mais tolerante ao déficit hídrico (40% da ETr) durante a fase vegetativa para o número de sementes totais. O déficit hídrico na fase de frutificação do algodoeiro colorido pode ser utilizado no cultivo do algodoeiro com as menores perdas no peso de 100 sementes.   Palavras-chave: Gossypium hirsutum L., fitomassa, produção     SOARES, L. A. dos A.; DIAS, K. M. M.; NASCIMENTO, H. M.; LIMA, G. S. de OLIVEIRA, K. J. A. de; SILVA, S. S. da STRATEGIES FOR THE MANAGEMENT OF WATER DEFICIT IN PHENOLOGICAL PHASES OF COLORED COTTON   2 ABSTRACT   Water scarcity is a limiting factor for irrigated agriculture, mainly in some phases of cotton, affecting physiological processes and consequently productivity. In this context, this work aimed to evaluate the phytomass and production components of colored cotton genotypes under water deficit in different phenological phases of the plant. The plants were conducted in lysimeters under field conditions, at the Center for Science and Agrifood Technology belonging to the Federal University of Campina Grande, in the city of Pombal-PB. The design used was in a randomized block in a 3 x 3 factorial scheme, with three colored fiber cotton genotypes (BRS Rubi, BRS Topázio and BRS Safira) irrigated under water deficit during the three stages of crop development (vegetative, flowering and fruiting). The root/shoot ratio is more sensitive to the effects of water deficit during flowering and boll formation. Among the genotypes, BRS Topázio is the most tolerant to water deficit (40% of ETr) during the vegetative phase for the number of total seeds. The water deficit in the fruiting stage of colored cotton can be used in the cultivation of cotton with the lowest losses in the weight of 100 seeds.   Keywords: Gossypium hirsutum L., phytomass, production

scholarly journals Genetic Distance and Variation among Cotton (Gossypium hirsutum. L) Genotypes for Yield Traits in Kamashi District of Benishangul-Gumuz Regional State, Ethiopia

2019 ◽  
Vol 7 (4) ◽  
pp. 91-100
Author(s):  
Kedir Wulchafo Hussen
Keyword(s):  
Gossypium Hirsutum ◽  
Genetic Distance ◽  
Block Design ◽  
Yield Traits ◽  
Gossypium Hirsutum L ◽  
Mean Values ◽  
Regional State ◽  
Wide Range ◽  
Randomized Complete Block Design ◽  
Cotton Genotypes

The present research was carried out to determine and record genetic distance and variation among cotton (Gossypium hirsutum L) genotypes for yield traits in Kamashi district of benishangul-gumuz regional state for fourteen upland cotton genotypes. The genotypes were evaluated for ten traits in randomized complete block design with three replications. Data were collected on days of 50% flowering, days to 65%boll opening, plant height, Number of monopodial branches per plant, Number of sympodial branches per plant, Boll number per plant, Boll weight Seed cotton yield per hectare, Lint yield and Ginning out tern. The data were subjected to analysis of variance. Genotypes were varied significantly for most of the traits studied and there were wide range variation on mean values for most of the traits which indicated the presence of variability among the tested genotypes.

scholarly journals ABSORÇÃO DE CÁTIONS E PRODUÇÃO DE MATÉRIA SECA POR GENÓTIPOS DE ALGODÃO SOB CONDIÇÕES SALINAS.

Irriga ◽  
2001 ◽  
Vol 6 (3) ◽  
pp. 104-110
Author(s):  
Sérgio Oliveira Pinto de Queiroz ◽  
Leonardo Theodoro Bull
Keyword(s):  
Gossypium Hirsutum ◽  
Dry Matter ◽  
Sodium Absorption ◽  
Gossypium Hirsutum L ◽  
Matter Production ◽  
Diluted Solution ◽  
Cotton Genotypes ◽  
Calcium Magnesium ◽  
E Mail ◽  
Specific Influence

ABSORÇÃO DE CÁTIONS E PRODUÇÃO DE MATÉRIA SECA POR GENÓTIPOS DE ALGODÃO SOB CONDIÇÕES SALINAS.  Sérgio Oliveira Pinto de QueirozDoutorando, Faculdade de Engenharia Agrícola, Universidade Estadual de Campinas, Departamento de Água e Solos, Campinas, SP,  Bolsista CNPq. CEP 13093.970,Cx. Postal 6011, tel.: (19) 788 1029, fax: (19) 788 1010.E-mail: [email protected] Theodoro Büll Faculdade de Ciências Agronômicas UNESP -  Departamento de Recursos Naturais,  Fazenda Experimental Lageado, Botucatu, SP. CEP 18603 970, Cx. Postal 237, telefax: (14)6802 7169.E-mail: [email protected]  1 RESUMO Este estudo foi conduzido com o objetivo de estudar a tolerância aos sais de cinco cultivares de algodão (Gossypium hirsutum, L.): Acala 1, Precoce 1, IAC 19, IAC 20 e Epamig 4, além de avaliar a influência específica do sódio na absorção de cátions nutrientes. O experimento foi conduzido em casa de vegetação, utilizando-se vasos plásticos contendo 8,5 kg de terra, na qual foi aplicado NaCl  em quantidades suficientes para elevar o  nível  de condutividade elétrica  de  0 para próximos de 8, 16 e 24 dS . m-1 a 25° C. Todos os vasos receberam aplicações de 150 mg P. kg-1 solo, solução nutritiva contendo 30 mg N e 40 mg K . kg-1 solo e, semanalmente, solução diluída de micronutrientes.O solo foi avaliado pela Relação de Adsorção de Sódio (RAS) e Relação de Sódio Trocável (RST), através de amostras coletadas dos vasos, ao final do experimento.Pelos dos resultados constatou-se que a elevação na concentração de sódio na solução no solo, além de reduzir o potencial osmótico da solução do solo, reduziu a absorção de potássio, cálcio e magnésio e a produção de matéria seca por todos os cultivares de algodão. UNITERMOS: algodão, salinidade, sódio.  QUEIROZ, S.O.P., BÜLL, L.T. CATION ABSORPTION AND DRY MATTER PRODUCTION BY COTTON GENOTYPES UNDER SALINITY CONDITIONS  2 ABSTRACT This study was carried out in order to evaluate the tolerance to salt by five cultivars of cotton (Gossypium hirsutum, L.): Acala 1, Precoce 1, IAC 19, IAC 20 and Epamig 4, besides evaluating the specific influence of  sodium for cation absorption. The experiment were installed at greenhouse, in 8.5 kg plastic pots on benches, in which NaCl was applied  to promote 8, 16 and 24 dS/m electric conductivity  (at 25°C ) 150 mg P, 30 mg N. and 4 mg K peer  kg soil and, weekly, diluted solution of micronutrients. The soil was evaluated by the Sodium Adsorption Relation (SAR) and Exchangeable Sodium Relations (ESR), through samples from pots, at the end of the experiment.From the results, it was possible to conclude that occurred sodium  increase in the  soil solution and sodium absorption but  decrease  of potassium, calcium, magnesium and dry matter  in all cultivars. KEYWORDS: cotton, salinity, sodium.

scholarly journals Pollination Efficiency of Amegilla calens (Hymenoptera: Apidae) on Gossypium hirsutum L. (Malvaceae) Variety L457 Flowers at Meskine (Maroua, Cameroon)

2020 ◽  
Author(s):  
issaya Kodji issaya ◽  
Beaudelaine Stephanie KENGNI ◽  
TOPE Sidonie FAMENI ◽  
FOHOUO Fernand-Nestor TCHUENGUEM
Keyword(s):  
Gossypium Hirsutum ◽  
Foraging Behaviour ◽  
Daily Rhythm ◽  
Insect Species ◽  
Pollination Efficiency ◽  
Gossypium Hirsutum L ◽  
The Mean ◽  
Seed Yields ◽  
The Impact ◽  
Number Of Seeds

This study was carried out to evaluate the impact of Amegilla calens bee on fruit and seed yields of G. hirsutum in an experimental field, in September 2018 and 2019. The experiments were carried out on 540 flowers divided in four treatments: 120 flowers accessible to all visitors; 120 flowers bagged to avoid all visits; 200 flowers protected and uncovered when they were opened, to allow A. calens visits; 100 flowers bagged then uncovered and rebagged without the visit of insects or any other organism. Bee’s daily rhythm of activity, its foraging behaviour on flowers, its pollination efficiency, the fruiting rate, the number of seeds per fruit and the percentage of normal seeds were evaluated. Among the 20 insect species recorded on G. hirsutum flowers, A. calens was the most frequent insect with 30.72 % of 655 visits. On flowers, individual bee intensely collected pollen and slightly harvested nectar. The mean duration of a visit per flower was 23.56 sec for pollen harvest and 13.68 sec for nectar collection. For the two years, through its pollination efficiency, A. calens increased the fruiting rate by 20.30 %, as well as the percentage of normal seeds by 32.39 %.

Assessment of New Upland Cotton Genotypes (Gossypium hirsutum L.) for Yield Stability and Adaptability

2007 ◽  
Vol 6 (6) ◽  
pp. 1012-1015
Author(s):  
Nasir Ghafoor Khan ◽  
Muhammad Naveed ◽  
Noor Ul Islam ◽  
Muhammad Saeed Iqbal
Keyword(s):  
Gossypium Hirsutum ◽  
Upland Cotton ◽  
Yield Stability ◽  
Gossypium Hirsutum L ◽  
Cotton Genotypes
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