scholarly journals AGRONOMIC PERFORMANCE AND HETEROSIS OF STRAWBERRY INBRED HYBRIDS OBTAINED BY TOP-CROSS MATING SYSTEM

2019 ◽  
Vol 18 (1) ◽  
pp. 85-97 ◽  
Author(s):  
Elżbieta Kaczmarska ◽  
Jacek Gawroński
Keyword(s):  
Combining Ability ◽  
Inbred Lines ◽  
Fruit Weight ◽  
General Combining Ability ◽  
Fruit Yield ◽  
Breeding Value ◽  
Agronomic Performance ◽  
Breeding Programs ◽  
Strawberry Breeding ◽  
Weight Number

The aim of this study was to develop an inbred lines from octoploid strawberry and to determine their breeding value by estimating the effects of general combining ability (GCA) and mid-parent heterosis. All inbred lines were obtained through selfing using five cultivars. The number of inflorescences, number of flowers per inflorescence, fruit yield, fruit number per plant, average fruit weight, number and weight of leaves as well as number of runners per plant were recorded from 2014 to 2015. The highest breeding value was estimated for maternal forms of ‘Senga Sengana’ 17 for six important traits. The lowest GCA effects were exhibited by inbred lines derived from clone 1387 18. Degree of heterosis for a given trait differed greatly among hybrids. The highest heterosis in terms of a number of inflorescences, fruit yield, number of fruits per plant and leaf weight occurred in the Kent 7-14 × ‘Dukat’ progeny. The results obtained could be used to evaluate the agronomic performance and to make more efficient choices of parents in current strawberry breeding programs.

INBRED LINE × TESTER ANALYSIS AND THE POTENTIAL OF INBREEDING IN STRAWBERRY BREEDING

1971 ◽  
Vol 13 (3) ◽  
pp. 460-469 ◽  
Author(s):  
L. P. S. Spangelo ◽  
C. S. Hsu ◽  
S. O. Fejer ◽  
R. Watkins
Keyword(s):  
Inbred Line ◽  
Combining Ability ◽  
General Combining Ability ◽  
Fruit Yield ◽  
Specific Combining Ability ◽  
Combining Abilities ◽  
Strawberry Breeding

The performance in fruit yield characteristics and fruit appearance of seven Premier S5 inbred selections was studied in their crosses with four tester varieties, Redcoat, Senga Sengana, Sparkle and Jerseybelle. Some of the progenies produced by crossing Premier S5, inbreds with testers were superior in a number of yield characters to those produced when Premier was crossed to the same testers. This suggests that inbreeding, although expensive and time consuming, may be a useful step in one type of approach to breeding for higher yield in the cultivated strawberry.General combining abilities of the inbred selections and of the testers were both significant for all but one character, while specific combining ability of inbreds × testers was significant for six of the eight characters. The estimates of general combining ability effects of the inbreds and the testers were found to be of limited value in predicting the most desirable single crosses. The significance of this is discussed together with a proposed procedure for exploiting inbreeding in strawberry breeding.

scholarly journals Estimation of general combining ability (GCA) in fifteen Cucumis sativus L inbred lines of the fifth generations

2021 ◽  
Vol 20 (04) ◽  
pp. 1-9
Author(s):  
Hiet D. Hoang
Keyword(s):  
Combining Ability ◽  
Inbred Lines ◽  
General Combining Ability ◽  
Fruit Yield ◽  
Ho Chi Minh City ◽  
High Tech ◽  
Cucumis Sativus L ◽  
F1 Hybrid ◽  
High Yields ◽  
Development Center

The study on General Combining ability (GCA) of 15 cucumber inbred lines (I5) was carried out at the Research and Development Center for High-tech Agriculture, Ho Chi Minh City. The objective of the study was to identify the appropriate parental lines for producing F1 hybrid cucumber cultivars. Experimental materials included 15 cucumber inbred lines (I5) (L3, L9, L21, L22, L28, L32, L33, L36, L39, L61, L63, L69, L71, L74 and L78) and two test lines (T1 - TN 456 from Trang Nong Company, imported from Thailand and T2 - Cuct 1450 from Chia Tai - Thailand), forming 30 hybrid combinations by the method of topcross. The results showed that seven inbred lines including L3, L9, L21, L28, L33, L61 and L71 had high ability to combine with both T1 and T2 tester lines abby fruit yield with GCA index from + (0.8) to + (9.4). Evaluation of 30 cucumber hybrid was combinations on the growth and fruit yield characteristics showed that L28/T1 and L71/T2 hybrids were significantly different from other hybrids with high yields of 43.1 tons/ha and 41.3 tons/ha, respectively

scholarly journals Half Diallel Analysis for Biochemical and Morphological Traits in Cultivated Eggplants (Solanum melongena L.)

Agronomy ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1769
Author(s):  
Debi Rani Datta ◽  
Mohd Y. Rafii ◽  
Azizah Misran ◽  
Mashitah Jusoh ◽  
Oladosu Yusuff ◽  
...  
Keyword(s):  
Combining Ability ◽  
Fruit Weight ◽  
General Combining Ability ◽  
Fruit Yield ◽  
Soluble Solids ◽  
Width Ratio ◽  
Total Phenol Content ◽  
Fruit Length ◽  
Half Diallel ◽  
Fruit Diameter

Eleven morphologically diverse cultivated eggplant accessions were used for hybridization following half diallel mating design to obtain 55 hybrids. Evaluation of hybrids along with the parents was conducted over two locations followed by randomised complete block design with three replications to study gene action and combining ability of 15 morphological and biochemical traits. The analysis of variance indicated highly significant differences among the environments and interaction of genotype and environment, except for fruit length to width ratio. Additive gene effects were significant for the inheritance of these traits and expression of these additive genes were greatly affected by environments. The general combining ability (GCA) was greater than their respective specific combining ability (SCA) for all traits except for fruit yield per plant. High values of GCA and SCA effects for characters of interest were dispersed among different genotypes. From this study it was observed that the best parental line was BT15 based on days to first flowering, total number of fruits per plant, total soluble solids and total phenol content. Besides, the parent BM5 showed good general combining ability effects for fruit yield per plant, fruit length and fruit length to width ratio and the parent BB1 performed good general combining ability for fruit diameter, fruit girth and fruit weight. Besides, other parents showed the best performance for only one trait. On the other hand, the hybrid BT6 × BT15 was reported bearing early flowering with high total phenol content and the hybrid BM9 × BB26 has high fruit yield with high soluble solids. Besides, the hybrid BM9 × BB1 has a high fruit diameter and fruit weight. All other hybrids except for these three (BT6 × BT15, BM9 × BB26 and BM9 × BB1) were shown the best performance for only one trait. Hence, based on the desired trait, the hybrid can be selected for future use after large scale evaluation.

scholarly journals COMBINING ABILITY STUDIES FOR GROWTH AND YIELD CHARACTERS OF BHENDI ABELMOSCHUS ESCULENTUS (L.) MOENCH)

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
S. Kalaiselvan ◽  
S. Anuja
Keyword(s):  
Plant Height ◽  
Combining Ability ◽  
Block Design ◽  
Fruit Weight ◽  
Growth And Yield ◽  
F1 Hybrids ◽  
Randomized Block Design ◽  
Final Harvest ◽  
Weight Number ◽  
Number Of Branches

The present investigation consisted of 9 lines, 3 testers with their 27 F1 hybrids developed through line x tester mating fashion in randomized block design with three replications. Parents and hybrids differed significantly for gca and sca effects, respectively. Among the parents, maximum gca effect was found in EC 112241 and Aruna for inter node distance, EC 112241 and Arka Anamika for single fruit weight, EC 109454, EC 169344 and Arka Anamika for number of branches per plant, EC 169331 and Arka Anamika for number of fruits per plant, EC 109454 and Aruna for plant height at final harvest. The crosses exhibited maximum positive significant sca effect was observed in EC 112241 x Aruna, EC 109454 x Kashi Kranti and EC 112264 x Aruna were found as good specific combiners for single fruit weight, number of branches per plant and number of fruits per plant respectively. The hybrid EC 112264 x Aruna exhibited maximum significant negative sca effects for inter node distance and plant height at final harvest.

scholarly journals General and specific combining abilities in a lulo diallel cross (Solanum quitoense Lam.)

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
David Duarte-Alvarado ◽  
Tulio César Lagos-Burbano ◽  
Liz K. Lagos-Santander ◽  
Carlos-Andrés Benavides-Cardona
Keyword(s):  
Combining Ability ◽  
Nutritional Value ◽  
Diallel Cross ◽  
Polar Axis ◽  
Fruit Weight ◽  
Cold Climate ◽  
Breeding Programs ◽  
Single Cross ◽  
Improvement Programs ◽  
Flowering Onset

Lulo (Solanum quitoense) is a promising agro-industry fruit tree, not only because of its nutritional value, taste, and appearance but also because it provides an alternative production system in mild and moderately cold climate zones. Lulo crop yield and production in the Department of Nariño (Colombia) has decreased in recent years when compared to other producing regions in Colombia. Therefore, the objective of this study was to estimate the effects of the general combining ability (GCA) and the specific combining ability (SCA) in a diallel cross of 10 promising parents in four growing regions of the Department of Nariño for use in breeding programs. A total of 45 hybrid combinations were obtained and assessed with Griffing method 4. The following variables were assessed: days to flowering onset (DFO), number of clusters per branch (NCB), fruit weight (FW), polar axis (PA) of the fruit, and yield (Y). The analysis of variance showed statistical differences for most variables in response to single-cross hybrid effects and locations, except for NCB and Y. Moreover, significant differences were found for the interactions between the GCA and SCA and the hybrids and locations, respectively, meaning that environment must be considered when selecting parents with specific adaptability. The effects of the GCA and SCA promoted higher positive values for the FW and Y in parents 4, 6, and 8 and their combinations. Therefore, these parental genotypes are promising for lulo genetic improvement programs since their additive effects and genetic dominance favor fruit weight and yield.

scholarly journals Identification of Restorers with Desirable General Combining Ability from among New Inbred Lines of Sunflower (Helianthus annuus L.)

2020 ◽  
Vol 9 (12) ◽  
pp. 2923-2932
Author(s):  
S. D. Nehru ◽  
Akshata Timmanna Budihal ◽  
M. S. Umar Farooq ◽  
Y. G. Shadakshari ◽  
M. S. Uma ◽  
...  
Keyword(s):  
Helianthus Annuus ◽  
Combining Ability ◽  
Inbred Lines ◽  
General Combining Ability ◽  
Helianthus Annuus L

Genetics of physiological and agronomical traits linked to salinity tolerance in tomato

2021 ◽  
Vol 72 (4) ◽  
pp. 280
Author(s):  
Mohammad Moradi ◽  
Hamid Dehghani ◽  
Sied Zabihallah Ravari
Keyword(s):  
Cell Membrane ◽  
Salinity Tolerance ◽  
Combining Ability ◽  
Relative Water Content ◽  
Gene Action ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Salt Tolerant ◽  
Cell Membrane Stability ◽  
Relative Water

Improvement of tomato (Lycopersicon esculentum L.) for growth in saline soils is a major goal of tomato breeders. The aim of this study was to identify the genetic combining ability and genetics of salinity tolerance in tomato. Plant materials were grown under normal (NG) and salinity stress (SSG) conditions. Results showed that the genetic controlling mechanism of salinity-related traits and fruit weight is complex and that all genetic components of additive, non-additive and maternal are involved. The nature of gene action for fruit weight and salinity-related traits was significantly affected by salinity stress. Dominance and additive gene action were predominant under NG and SSG, respectively. Under NG, the best general combiner parent for fruit weight was P3 (salt-tolerant with moderate fruit yield). Under SSG, P1 (highly salt-tolerant with low fruit yield) was the best general combiner parent for fruit weight and exhibited high genetic combining ability for K+/Na+, lipoxygenase activity, proline, relative water content, total carbohydrate and cell membrane stability. With the high frequency of genes effective in salt tolerance, the P1 parent appeared as the best specific mating partner with other parents under SSG. Simultaneous selection for fruit weight and surrogate traits (cell membrane stability, proline and relative water content) in a population derived from the P1 × P5 (susceptible with high fruit yield) cross could result in a salt-tolerant tomato genotype.

Combining ability for fruit yield and quality in papaya recombinant inbred lines from the sexual conversion backcrossing

Euphytica ◽  
2019 ◽  
Vol 215 (10) ◽  
Author(s):  
Renato Santa Catarina ◽  
Diego Fernando Marmolejo Cortes ◽  
Julio Cesar Fiorio Vettorazzi ◽  
Tathianne Pastana de Sousa Poltronieri ◽  
Gislanne Brito de Araújo Barros ◽  
...  
Keyword(s):  
Recombinant Inbred ◽  
Combining Ability ◽  
Recombinant Inbred Lines ◽  
Inbred Lines ◽  
Fruit Yield ◽  
Yield And Quality

scholarly journals Performance of testers with different genetic structure for evaluation of maize inbred lines

2012 ◽  
Vol 42 (5) ◽  
pp. 770-776 ◽  
Author(s):  
Lauro José Moreira Guimarães ◽  
Glauco Vieira Miranda ◽  
Rodrigo Oliveira DeLima ◽  
Ciro Maia ◽  
Lucimar Rodrigues de Oliveira ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Combining Ability ◽  
Genetic Variance ◽  
Inbred Lines ◽  
General Combining Ability ◽  
Specific Combining Ability ◽  
Genetic Base ◽  
Maize Inbred Lines ◽  
Single Cross ◽  
Single Cross Hybrids

The objective of this study was to evaluate four maize testers for identification of superior inbreed lines in testcross. The four testers evaluated are cultivars with narrow or wide genetic base (single-cross hybrids and open pollinated varieties) and two kernel types (flint or dent). SynD and SynF testers are open pollinated varieties with dent and flint kernels, respectively, and FSH and DSH testers are single-cross hybrids with flint and dent kernels, respectively. SynD tester showed the biggest genetic variance among the maize inbreed lines in crosses. The effects of general combining ability (GCA) for lines and specific combining ability (SCA) for lines x testers were significant, whereas GCA effects for testers were not significant. SynD and SynF testers identified the largest number of lines with higher GCA. The DSH and FSH testers showed suitable to identify lines with high SCA. It was concluded that SynD and SynF testers are adequate to identify inbreed lines with high GCA effects, and it's possible to identify new lines with high heterotic potential in each one of the four testers.

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