COMBINING ABILITY ANALYSIS IN THE CULTIVATED STRAWBERRY

1971 ◽  
Vol 51 (5) ◽  
pp. 377-383 ◽  
Author(s):  
L. P. S. SPANGELO ◽  
R. WATKINS ◽  
C. S. HSU ◽  
S. O. FEJER
Keyword(s):  
Combining Ability ◽  
Plant Density ◽  
Diallel Cross ◽  
General Combining Ability ◽  
Flower Stalk ◽  
Combining Abilities ◽  
Combining Ability Analysis ◽  
Strawberry Cultivars

General and specific combining abilities were analyzed for total, marketable, early, and late yield, and for flower stalk number in a diallel cross of eight strawberry cultivars. Data were recorded from individual seedlings restricted to two runner plants, thereby eliminating variability resulting from differences in plant density. General and specific combining abilities for the five characters were highly significant. Estimates of general combining ability effects taken alone were, in general, of little value in predicting the order of desirability of individual crosses.

GENOTYPE × ENVIRONMENT INTERACTIONS IN SMOOTH BROMEGRASS. I. YIELD

1979 ◽  
Vol 21 (1) ◽  
pp. 57-63 ◽  
Author(s):  
Wai-Koon Tan ◽  
Geok-Yong Tan ◽  
P. D. Walton
Keyword(s):  
Genetic Variation ◽  
Analysis Of Variance ◽  
Combining Ability ◽  
Significant Variation ◽  
Diallel Cross ◽  
General Combining Ability ◽  
Bromus Inermis ◽  
Smooth Bromegrass ◽  
Combining Ability Analysis ◽  
Half Diallel

Twenty-one progenies and the parents of a 7 × 7 half diallel cross of smooth bromegrass (Bromus inermis Leyss.) were evaluated at four locations in Alberta in each of two years, for genetic variation and genetic by environment interactions in the expression of their yield potentials. Years, locations and their interactions were highly significant in the combined analysis of variance. Combining ability analysis revealed that general combining ability (GCA) and specific combining ability (SCA) were both important in the expression of yield, including spring, fall and annual yield, whereas GCA was more important than SCA for yield per area. Although the genotype × environment interactions were all highly significant, variation accounted for by combining ability effects was generally higher than the interaction effects of GCA and SCA respectively, with environments. High average GCA effects for spring, fall and annual yield were demonstrated for the clones UA5, UA9 and B42. These together with the high average SCA effects suggested that the three clones could be included in a synthetic to develop high yielding cultivars. The results suggested that recurrent selections involving multi-location and multi-year testing seems necessary in breeding for high yielding bromegrass cultivars in Alberta.

Heterotic performance and combining ability in a diallel cross among spring wheats (Triticum aestivum L.)

1971 ◽  
Vol 22 (3) ◽  
pp. 359 ◽  
Author(s):  
GM Bhatt
Keyword(s):  
Combining Ability ◽  
Diallel Cross ◽  
Triticum Aestivum L ◽  
General Combining Ability ◽  
Kernel Weight ◽  
Hybrid Vigour ◽  
Hybrid Performance ◽  
Wheat Kernel ◽  
Combining Ability Analysis ◽  
F1 Generation

Levels of hybrid vigour for earliness, plant height, four components of yield, and yield were examined in the F1 generation of a diallel cross of eight cultivars of spring wheat. Kernel weight and kernels per spike exhibited high levels of heterosis effects. The analysis for general combining ability indicated that a large part of the total genetic variation observed for six out of seven traits was associated with genes which were additive in their effects. The estimates for specific combining ability were highly significant for five out of seven traits. These estimates were lower than those of general combining ability for six out of seven traits. The combining ability analysis helped in classifying the parents in terms of their hybrid performance and in gaining greater understanding of the nature of quantitatively inherited traits. The importance of genetic diversity in relation to heterosis was also assessed.

A STUDY OF COMBINING ABILITY FOR GRAIN PROTEIN PERCENTAGE IN A DIALLEL CROSS OF FIVE SIX-ROW BARLEY CULTIVARS

1974 ◽  
Vol 54 (4) ◽  
pp. 605-609 ◽  
Author(s):  
K. G. BRIGGS
Keyword(s):  
Combining Ability ◽  
Diallel Cross ◽  
General Combining Ability ◽  
Grain Protein ◽  
Hordeum Vulgare L ◽  
Protein Percentage ◽  
Barley Cultivars ◽  
Combining Ability Analysis ◽  
Lower Protein ◽  
Complete Diallel Cross

Grain protein percentage was assessed in F1 and F2 populations in two experiments involving a complete diallel cross among the barley (Hordeum vulgare L.) cultivars Bonanza, Conquest, Olli, Galt and Jubilee. Heterosis was absent in all crosses and a Griffing combining ability analysis showed that specific combining ability was nonsignificant in both F1 and F2 populations. General combining ability (GCA) for protein percentage was highly significant in both generations, with Conquest and Olli having major positive GCA effects. Galt produced a large negative GCA effect, while Jubilee and Bonanza caused small negative GCA effects. Significant differences between the hybrids were found only in F1. Broad sense heritabilities for protein differences between the parents were 0.57 and 0.72 in the two experiments, and were significant at the 5 and 1% levels of significance, respectively. Conquest had significantly higher protein than Bonanza, with Olli being intermediate. Galt had lower protein than Jubilee, but this difference was significant in only one experiment. The differences among the five cultivars for mean grain protein percentage and general combining ability are significant in relation to breeding for malting and feed type barleys.

GENETIC ANALYSIS OF QUANTITATIVE CHARACTERS IN CIGAR AND PIPE TOBACCO NICOTIANA TABACUM. I. MORPHOLOGICAL CHARACTERS

1980 ◽  
Vol 22 (2) ◽  
pp. 173-182 ◽  
Author(s):  
I. S. Ogilvie ◽  
V. Kozumplik
Keyword(s):  
Combining Ability ◽  
Diallel Cross ◽  
Morphological Characters ◽  
General Combining Ability ◽  
Leaf Length ◽  
Specific Combining Ability ◽  
Leaf Angle ◽  
Combining Abilities ◽  
Number Of Leaves ◽  
Pipe Tobacco

A diallel cross of four cigar and one pipe tobacco was analysed for the following characters: (1) height before topping (2) height after topping (3) number of leaves (4) leaf width (5) leaf length (6) leaf angle and (7) days from transplanting to flower. The experiment was performed over three years with four replications. Analysis was done for general combining ability and specific combining ability. General combining ability was in all cases greater than specific combining ability, although there were some specific combining ability effects. The line Pennbel 69 showed very high positive general combining abilities for all characters while the line Petit Havane showed negative general combining abilities for these characters. Commercial production of F1 hybrids would not seem to be of any advantage for any of these characters with these parental lines.

Heterosis, inbreeding depression and combining abilities in a five-parent diallel of six-row barley

1976 ◽  
Vol 86 (3) ◽  
pp. 537-542 ◽  
Author(s):  
H. G. Nasr ◽  
W. Khayrallah
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Inbreeding Depression ◽  
Combining Ability ◽  
Diallel Cross ◽  
General Combining Ability ◽  
Kernel Weight ◽  
Specific Combining Ability ◽  
Combining Abilities ◽  
Good Yielding

SummaryThe F1 and F2 generations of a diallel cross of six-row barley involving the parents, Beecher, Athenais, Atlas 46, 3130-4564-3, and 3130-864-4 were studied and heterosis, inbreeding depression, and combining abilities were measured for grain yield, number of tillers per plant, number of kernels per plant, kernel weight, and plant height. Significant heterosis was detected for grain yield in two of the ten crosses, for number of tillers per plant in one cross, for number of kernels per plant in two crosses, for plant height in three crosses, and for kernel weight in none of the crosses. The inbreeding depression of the F2 generation was present in most cases but significantly so in a few. Atlas 46 x 3130-4564-3 exhibited inbreeding depression for grain yield, number of kernels per plant, and plant height.The general combining ability (GCA) mean squares of both generations were significant for all characters studied except number of kernels per plant in the F1 generation. The specific combining ability (SCA) mean squares were significant for only plant height in the F1 generation and all characters studied except number of tillers per plant in the F2 generation.The GCA effects indicated that Beecher and Athenais are good general combiners for grain yield and its components. The latter parent produced good yielding hybrids with slightly shorter plants than the remaining hybrids.The SCA effects revealed that Athenais × 3130-4564-3, Athenais × 3130-864-4, and Beecher × Atlas 46 seem good specific combinations for high grain yield. Also, the former two crosses tend to produce shorter plants.

HETEROSIS, COMBINING ABILITY, AND PREDICTED SYNTHETICS FROM A DIALLEL CROSS IN SUNFLOWERS (HELIANTHUS ANNUUS L.)

1966 ◽  
Vol 46 (1) ◽  
pp. 59-67 ◽  
Author(s):  
Eric D. Putt
Keyword(s):  
Helianthus Annuus ◽  
Combining Ability ◽  
Oil Content ◽  
Diallel Cross ◽  
General Combining Ability ◽  
Specific Combining Ability ◽  
Helianthus Annuus L ◽  
The Mean ◽  
Seed Characters ◽  
Mature Weight

Heterosis occurred for the eight plant and seed characters studied. It was most frequent for yield of seed and height of plant. Mean squares for general combining ability (gca) and specific combining ability (sca) were significant (P =.01) for all characters. The estimated components for gca were greater than for sca for days to mature, weight per bushel, and percent oil in the seed; less for height and yield of seed; and essentially the same for days to bloom, diameter of head, and weight per 1000 seeds.The yield of seed and percent oil in the seed, for the highest ranking 100 synthetics that could be composed from the 10 lines, was predicted in F6 assuming 50 and 60% outcrossing between F2 and F6. Virtually all values exceeded the mean performance of four check samples of commercial hybrids. Many exceeded the highest rank check for oil content in the seed. Fourteen of the highest ranking 100 synthetics for yield and 30 for oil content consisted of two or three lines. It was concluded that synthetics can be superior to the present hybrids in heterosis and that desirable synthetics can be made from only a few lines.

scholarly journals Genetic parameters and combining ability of some important traits in rice (Oryza sativa L.)

Genetika ◽  
2017 ◽  
Vol 49 (3) ◽  
pp. 1001-1014 ◽  
Author(s):  
Hasanalideh Haghighi ◽  
Ezatollah Farshadfar ◽  
Mehrzad Allahgholipour
Keyword(s):  
Combining Ability ◽  
Genetic Parameters ◽  
Amylose Content ◽  
Oryza Sativa L ◽  
Block Design ◽  
Regression Line ◽  
Diallel Cross ◽  
Combining Ability Analysis ◽  
Additive Gene ◽  
F2 Generation

In order to study the combining ability, genetic parameters and gene actions of yield, yield components and quality characters in rice, fifteen F2 generation of a 6?6 diallel cross, excluding reciprocals, was grown in a randomized complete block design (RCBD) with three replications. The results of analysis of variance showed significant differences between the genotypes for grain yield (GY), 100-grain weight (HGW), number of panicles per plant (PN), panicle length (PL), number of full grains per panicle (FGN) and for quality characters including amylose content (AC) and gel consistency (GC). The results of combining ability analysis revealed that general combining ability (GCA) and specific combining ability (SCA) were significant for characters GY, FGN, GC, AC, HGW and PN indicating the involvement of additive and non-additive effects in their inheritance, however high amounts of Bakers ratio remarked that additive gene effect had more portion in controlling these traits. The best combiners for GY, HGW, FGN, PN and PL, were RI18447-2, IR 50, Daylamani, RI18430-46 and Daylamani respectively. For AC and GC, the best combiner was Daylamani. Hayman's graphs showed that regression line passed below the origin cutting Wr axis in the negative region for HGW, PN, PL and GC, indicating the presence of over dominance. Estimates of genetic parameters showed significant amount of H1 and H2, and non-significant amount of D for the characters GY, PN, PL and GC, which confirmed the existence of dominance in the inheritance of these traits.

scholarly journals Studies on Physio-chemical Properties of Maintainer, Restorer Lines and Hybrids of Chilies (Capsicum annuum L.)

2020 ◽  
pp. 122-138
Author(s):  
Maneechat Nikornpun ◽  
K. Tunjai ◽  
K. Kaewsombat ◽  
T. Tarinta ◽  
Danai Boonyakiat
Keyword(s):  
Vitamin C ◽  
Capsicum Annuum ◽  
Combining Ability ◽  
Chemical Properties ◽  
General Combining Ability ◽  
The Other ◽  
Capsicum Annuum L ◽  
Combining Abilities ◽  
Parental Lines ◽  
Better Than

Physio-chemical properties of hybrid chilies (Capsicum annuum L.), parental lines and commercial varieties were evaluated in three experiments and showed significant differences among them. Heterosis, and heterobeltiosis were studied in hybrids while, combining abilities were investigated in maintainers and restorers. Positive statistical differences in the general combining ability of the maintainer lines for vitamin C, capsaicin and Hue were observed and general combining ability indicated that, CA1286 and CA1303, were good maintainers for the improvement of capsaicin and vitamin C. The other maintainers;-, CA1441 and CA1442, are good for the improvement of L* and Chroma. The maintainer, CA1441, was better than CA1442 for capsaicin content,- while the maintainer, CA1442, was better than CA1441 for vitamin C. Positivity and statistically significant differences among the restorers were  observed  for vitamin C, capsaicin, Hue and Chroma  and  the lines;-, CA 1447, CA 1448, CA 1449, CA 1450 and CA 1451, were useful for the improvement of these  physio-chemical properties of chilies. 

scholarly journals Combining Ability Analysis of Yield and Its Components in Cacao

1990 ◽  
Vol 115 (3) ◽  
pp. 509-512 ◽  
Author(s):  
Geok Yong Tan
Keyword(s):  
Genetic Variability ◽  
Combining Ability ◽  
Theobroma Cacao ◽  
Female Parent ◽  
General Combining Ability ◽  
High Yield ◽  
Combining Ability Analysis ◽  
The Mean ◽  
Female Male Female ◽  
Bean Weight

Six Trinitario females of cacao (Theobroma cacao L.) were crossed with nine Amazonian males in a factorial crossing design. The 54 hybrid progenies were used to estimate genetic variability due to general combining ability (GCA) and specific combining ability (SCA) for yield, pod production, pod weight, husk content, number of beans per pod, average bean weight, and pod value. The results demonstrated that GCA differed significantly for all characteristics from all three sources (Le., female + male, female, and male). SCA (female × male) was also significantly different for all characteristics. The ratio of GCA to SCA ranged from 7.1 for number of beans per pod to 25.7 for pod weight. This result suggested that a major portion of the genetic variability was additive in nature for these characteristics. Among the six Trinitarios, KA2-106 was the best female parent; it contributed high yield and all the desirable pod and bean characteristics into the hybrid progenies. Trinitario KA2-101 combined high pod production and yield, but tended to transmit below-average pod and bean characteristics to its progenies. Amazonians KEE6 and KEE12 were the two highest-yielding male parents, but had below-average bean number per pod and average bean weight. KEE42 and KEE43 combined high yield and transmitted good pod and bean characteristics to their progenies. Based on the GCA effects and the mean performance of the hybrid progenies, a multi-line cultivar consisting of 20 high-yielding crosses with good pod and bean characteristics is being produced in seed gardens for commercial planting.

Sign in / Sign up

Export Citation Format

Share Document