scholarly journals Estimates of genetic parameters in diallelic populations of cotton subjected to water stress

2020 ◽  
Vol 24 (8) ◽  
pp. 541-546
Author(s):  
Walmir S. Vasconcelos ◽  
Roseane C. dos Santos ◽  
Ubieli A. A. Vasconcelos ◽  
José J. V. Cavalcanti ◽  
Francisco J. C. Farias
Keyword(s):  
Water Stress ◽  
Combining Ability ◽  
Genetic Parameters ◽  
Fiber Quality ◽  
Semiarid Region ◽  
Flowering Stage ◽  
Fiber Quality Traits ◽  
Cotton Plants ◽  
Cotton Genotypes ◽  
Partial Diallel

ABSTRACT The objective of this study was to estimate the general combining ability (GCA) and specific combining ability (SCA) of cotton genotypes subjected to water stress, based on fiber quality traits. Irrigated cotton plants were grown in the dry season in the Northeast region of Brazil and subjected to 23 days without irrigation at the beginning of the flowering stage. GCA and SCA analyses were based on the partial diallel model. Significant differences were found for GCA for all traits, with predominance of additive effects. The crossing between the genotypes FM-966 and CNPA-5M was the most promising hybrid combination, showing great potential for improvements in fiber quality in environments subjected to water stress, such as the Semiarid region of the Northeast of Brazil.

scholarly journals Combining ability and heterosis for fiber quality traits in cotton

2010 ◽  
Vol 62 (1) ◽  
pp. 3-16 ◽  
Author(s):  
Yuksel Bolek ◽  
Hatice Cokkizgin ◽  
Adem Bardak
Keyword(s):  
Combining Ability ◽  
Recurrent Selection ◽  
Fiber Quality ◽  
Block Design ◽  
Short Fiber ◽  
Quality Traits ◽  
Gene Effects ◽  
Fiber Quality Traits ◽  
High Fiber ◽  
Additive Gene

Combining ability and heterosis for fiber quality traits in cotton Combining ability analysis and heterosis for cotton fiber quality traits were studied in a set of diallel crosses involving eight cotton (Gossypium sp.) genotypes. Randomized complete block design was used to test 56 F1 and 8 parents for fiber quality traits; length (Len), strength (Str), micronaire (Mic), uniformity (Unf), elongation (Elg), spinning consistency index (Sci) and short fiber index (Sfi). Analysis revealed significant general combining ability (GCA) and specific combining ability (SCA) effects for all the traits and additive gene effects were important in the inheritance of the traits. Giza-45 had the highest GCA effects for Len, Sci, Unf and Elg while Is-4 had the highest Str value. Mic and Sfi values were lowest for Askabat-100 and Giza-45, respectively. The cross Cukurova-1518 × 108-F and Nazilli-84S × Askabat-100 had the lowest SCA effects for Mic and Sfi, respectively. The highest values for Len (Askabat-100 × 108-F), for Str (Acala Prema × 108-F), for Sci (Is-4 × Giza-45), for Unf (Stoneville-453 × Askabat-100) and for Elg (108-F × Is-4) were also obtained. Hybridizations among Askabat-100 × Nazilli-84S, Is-4 × Giza-45, Askabat-100 × Stoneville-453, Askabat-100 × Giza-45, Is-4 × 108F, Giza-45 × 108F, Giza-45 × Acala Prema, Nazilli-84S × Giza-45, Is-4 × Nazilli-84S and Acala Prema × Askabat-100 crosses yielded the best heterosis and heterobeltiosis values. Aforementioned parents and crosses could be utilized for further selection of high fiber quality and applying 3-way crosses or modified backcross or recurrent selection to genotypes having good combining ability would improve fiber quality.

scholarly journals Phenotypic response of cotton genotypes for yield and fiber quality traits

2020 ◽  
Vol 2 (1) ◽  
pp. 17
Author(s):  
Abdul Wahab Soomro
Keyword(s):  
Fiber Quality ◽  
Central Zone ◽  
Quality Traits ◽  
Cotton Production ◽  
Fiber Quality Traits ◽  
Commercial Cultivation ◽  
Significant Difference ◽  
Cotton Genotypes ◽  
Time Utilization ◽  
Textile Sector

Twenty five cotton genotypes were tested with two standard check varieties in National Coordinated Varietal Trial (NCVT). The significant difference was observed among all the genotypes of yield, its contributing traits and fiber quality traits, which indicated sufficient genetic diversity were present in the material. Among the genotypes, ICI-2121, GH-Hadi and NIAB-898 are high yielding cotton genotypes, these are suggested for commercial cultivation at the environmental condition of central zone of Sindh to boost up cotton production and at the same time utilization in hybridization and breeding program to evolve high yielding variety.  For the fiber quality traits NIBA-898 and NS-191 are suitable genotypes to meet the criteria of textile sector.

Microsatellite-based characterization of cotton genotypes for verticillium wilt and fiber quality traits

2017 ◽  
Vol 43 (3) ◽  
pp. 277-288
Author(s):  
Amna Saeed ◽  
Eminur Elçi
Keyword(s):  
Genetic Diversity ◽  
Ssr Markers ◽  
Verticillium Wilt ◽  
Fiber Quality ◽  
Stress Factors ◽  
Quality Traits ◽  
Cotton Yield ◽  
Fiber Quality Traits ◽  
Resistant Cultivars ◽  
Cotton Genotypes

Abstract Cotton (Gossypium hirsutum L.) is the most important natural textile fiber crop grown worldwide. Several biotic and abiotic stress factors affect cotton yield due to lower genetic diversity for the traits of particular interest. Verticillium wilt (VW) is one of the major factors incurring huge cotton yield losses. The most effective management option against VW is the development of resistant cultivars. The resistant cultivars must also have superior fiber quality and yield traits. Therefore, the current study was aimed at screening some of the identified simple sequence repeats (SSR) markers for VW resistance and fiber quality traits of cotton genotypes in Turkey. Fifty different cultivars were screened with 30 SSR markers. Polymerase chain reaction (PCR) was conducted to amplify the SSR markers. The amplified bands were scored as 0 or 1 for absence and presence, respectively. For the molecular data analysis, polymorphism information content (PIC) values of molecular markers were calculated. Among tested SSR markers 13 were found polymorphic, which produced a total of 677 loci. The number of alleles per marker ranged from 1 to 4 and, overall average PIC values of markers ranged from 0.00 to 0.76, respectively. Principal component analysis executed on presence absence data yielded two distinct groups of cultivars screened. Hierarchical clustering revealed low genetic diversity among the tested cultivars. Based on the results TamcotCamdES, Gloria, Natalia, Lydia, Teks, Tamcot SP37H, N87 and BA525 are the promising cultivars for further breeding studies. The results of the current study also revealed that 4 SSR markers (DPL752 and DPL322 for fiber traits, DPL0022 and GH215 for VW resistance) out of 30 could be used for improving VW resistance and fiber quality in cotton through marker assisted selection.

scholarly journals Genetic Analysis by Using Partial Diallel Crossing of Maize In High Plant Densities (Estimation GCA, SCA and Some Genetic Parameters)

2021 ◽  
Vol 910 (1) ◽  
pp. 012135
Author(s):  
Adeeb Jameel Amanah ◽  
Banan Hassan Hadi
Keyword(s):  
Inbred Line ◽  
Combining Ability ◽  
Genetic Parameters ◽  
Inbred Lines ◽  
Low Density ◽  
General Ability ◽  
Engineering Sciences ◽  
Diallel Crossing ◽  
Plant Densities ◽  
Partial Diallel

Abstract The experiment was carried out at the Field Crops Research Station, College of Agricultural Engineering Sciences - University of Baghdad in Jadiriyah, with the aim of evaluating the performance of partial diallel hybrids and inbred lines of maize and estimating general combining ability(GCA), specific combining ability (SCA) and some genetic parameters. The experiment was carried out in two seasons, spring and fall 2020. Eight inbred lines of maize were used in the study (BI9/834, BSW18, LW/5 L8/844, ZA17W194, Z117W, ZI17W9, ZI7W4), numbered (1,2,3,4,5,6,7,8), It was sowed in the spring season and entered into a cross-program according to a partial diallel crossing system to obtain twelve partially cross-hybrids, and it was compared with its eight parents in a comparison experiment in the fall season using a Randomized Complete Block Design (RCBD) with split plots arrangement with three replication. The plant densities of 70 and 90 thousand plants ha-1 represented the main plots, while the partial diallel hybrids and their parents represented the secondary plots. The results of the study showed that the ratio between GCA and SCA) GCA/SCA) It was more than 1 for yield traits, ear length, number of rows and number of row grains in both low and high densities, which indicates the control of the additive genetic action on these traits. While the ratio was less than one for the traits of the ear diameter under the low density, which indicates the control of dominance genes on this trait in the mentioned density, while the trait of the number of ear grains, the ratio between the general and specific combining abilities was less than one in the high density. Inbred line 8 had the highest effect for the general ability to combine under low density, which amounted to 11.075, while inbred line 2 was superior by giving the highest effect to the general ability to combine at low density, which amounted to 17.80, followed by inbred 8.

Genetic Control of Rooting Ability of Stem Cuttings in Eucalyptus nitens

1997 ◽  
Vol 45 (1) ◽  
pp. 203 ◽  
Author(s):  
Wayne N. Tibbits ◽  
Timothy L. White ◽  
Gary R. Hodge ◽  
Kelsey R. Joyce
Keyword(s):  
Genetic Control ◽  
Combining Ability ◽  
Genetic Parameters ◽  
Family Interaction ◽  
Specific Combining Ability ◽  
Stem Cuttings ◽  
Eucalyptus Nitens ◽  
Individual Tree ◽  
Rooting Ability ◽  
Partial Diallel

Genetic parameters for rooting of stem cuttings inEucalyptus nitens (Deane & Maiden) Maiden wereestimated from almost 600 control-pollinated seedlings grown in pots in anenvironmentally controlled glasshouse. Multiple harvests spanning a 9 monthperiod were taken from the 67 families arising from a partial diallel matingdesign among 25 unrelated parents. Overall, of the 14205 cuttings that wereset, only 14% initiated roots. There was little if any biologicallyimportant harvest-by-family interaction for rooting. Individual tree narrowsense heritability (h2) was highat 0.4–0.5. The ratio of specific combining ability variance to generalcombining ability variance was low. The operational implications forincorporating this trait into a breeding program are discussed.

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