scholarly journals COMBINING ABILITY STUDIES OF GRAIN YIELD AND RELATED TRAITS IN PEARL MILLET

1970 ◽  
pp. 21-23
Author(s):  
Muhammad Siddique, Muhammad Irshad-Ul- Haq, Saeeda Khanum ◽  
Naveed Kamal ◽  
Muhammad Arshad Ullah
Keyword(s):  
Grain Yield ◽  
Pearl Millet ◽  
Combining Ability ◽  
Genetic Architecture ◽  
Gene Action ◽  
Panicle Length ◽  
Days To Flowering ◽  
Ability Estimates ◽  
Additive Type ◽  
Combining Ability Analysis

The present study was undertaken to explore the genetic architecture of pearl millet through combining ability analysis in a 5X5 diallel fashion. Both GCA and SCA mean squares were significant in grain yield, plant height, panicle length and days to flowering. However, these were non-significant for number of productive tillers and panicle girth. General combining ability estimates revealed that genotype MGP-322 was good general combiner for all the traits under study except for days to flowering for which MGP-335 and 13RBS-01 were good general combiners but these were poor general combiners for all other traits under study. The crosses MGP-322XMGP-328, MGP-322XMGP-335, MGP-328X13RBS-13, 13RBS-01X13RBS-13 and MGP-322X13RBS-01 were best specific combiners for grain yield and some other attributes respectively. All these crosses involved at least one good general combiner except MGP-328X13RBS-13. This suggested that good general combiners are the best tool in improving the crop yield by manipulating the genetic architecture. Combining ability variances revealed that although both GCA and SCA variances were important, however, SCA variances were higher than GCA variances suggesting that non additive type of gene action was more prominent in the inheritance of characters under study.

Combining ability and heterosis studyin maize inbreds throughout diallel mating design

2018 ◽  
Vol 43 (4) ◽  
pp. 599-609
Author(s):  
ANMS Karim ◽  
S Ahmed ◽  
AH Akhi ◽  
MZA Talukder ◽  
A Karim
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Combining Ability ◽  
Gene Action ◽  
General Combining Ability ◽  
Specific Combining Ability ◽  
Gene Effects ◽  
Additive Type ◽  
Additive Gene ◽  
Ear Height

Combining ability effects were estimated for grain yield and some other important agronomic traits of maize in a 7×7 diallel analysis excluding reciprocals. The variances for general combining ability (GCA) were found significant for yield, days to pollen shedding, days to silking and ear height while it was found non-significant for plant height and number of kernels/ear. Non-significant general combining ability (GCA) variance for plant height and number of kernels/ear indicates that these two traits were predominantly controlled by non- additive type of gene action. Specific combining ability (SCA) was significant for all the characters except yield and days to silking. Non-significant specific combining ability (SCA) variance for yield and days to silking suggests that these two traits were predominantly controlled by additive type of gene action. Both GCA and SCA variances were found significant only in days to pollen shedding and ear height indicated the presence of additive as well as non additive gene effects for controlling the traits. However, relative magnitude of these variances indicated that additive gene effects were more prominent for all the characters studied except days to silking. Parent BIL95 was the best general combiner for both high yield and number of kernels/ear and parent BML4 for dwarf plant type. Two crosses (BML4× BML36 and BIL114× BIL31) exhibited significant and positive SCA effects for grain yield involved low × average and average × average general combining parents. The range of heterosis expressed by different crosses for grain yield and days to silking was from -65.83 to 21.26 percent and -17.85 to 8.22 percent, respectively.. The better performing three crosses (BIL114×BIL31, BIL138×BIL95 and BIL31×BIL95) can be utilized for developing high yielding hybrid varieties as well as for exploiting hybrid vigour.Bangladesh J. Agril. Res. 43(4): 599-609, December 2018

scholarly journals Combining Ability and Heterosis for Agronomic and Yield Traits in Indica and Japonica Rice Crosses

2018 ◽  
Vol 10 (12) ◽  
pp. 92 ◽  
Author(s):  
M. E. Yuga ◽  
J. M. Kimani ◽  
P. M. Kimani ◽  
M. F. Olubayo ◽  
J. W. Muthomi ◽  
...  
Keyword(s):  
Grain Yield ◽  
Combining Ability ◽  
Gene Action ◽  
Genetic Enhancement ◽  
F1 Hybrids ◽  
Japonica Rice ◽  
Yield Traits ◽  
Combining Ability Analysis ◽  
Days To Maturity ◽  
Check Variety

Understanding genetic variability and mode of gene action for agronomic and yield related traits is important in formulation of effective rice breeding program for genetic enhancement of grain yield. Combining ability analysis and heterosis was conducted to identify yield associated traits from nine male indicas and three female japonicas, together with their 27 F1 hybrids. Four parental lines, including Basmati 370, Basmati 217, K2-54 and Komboka showed good general combining ability in days to 50% flowering, days to maturity, number of tillers plant-1, number of spikelet’s panicle-1, number of panicles plant-1, number of filled grains panicle-1, and grain yield. While the combine K2-9 × Komboka, K2-9 × Basmati 370, K2-54 × Dourado Precoce and K2-54 × Basmati 217 showed specific good for grain yield. The hybrids K2-9 × Basmati 370, K2-8 × Basmati 217, K2-54 × Basmati 217 and K2-9 × Komboka showed 20% excess in standard check variety, suggesting that they could be good breeding donors.

scholarly journals Combining ability analysis in bread wheat (Triticum aestivum (L.) Em. Thell) under different environmental conditions

2019 ◽  
Vol 48 (1) ◽  
pp. 85-93
Author(s):  
Vijay Sharma ◽  
NS Dodiya ◽  
RB Dubey ◽  
Rumana Khan
Keyword(s):  
Grain Yield ◽  
Bread Wheat ◽  
Combining Ability ◽  
Gene Action ◽  
Flag Leaf ◽  
Triticum Aestivum L ◽  
Pooled Analysis ◽  
Combining Ability Analysis ◽  
Component Traits ◽  
Diverse Origin

Pooled analysis of 8 genotypes of wheat of diverse origin, their 28 F1s and 2 checks was carried out in 4 different environments to study the combining ability in bread wheat for grain yield and its component traits. On pooled basis, analysis of variance due to GCA and SCA was significant for all characters revealed difference between parents for GCA and difference between crosses for SCA. Similarly, mean square due to GCA × E was significant for number of effective tillers per plant and flag leaf area revealed influence of environment on GCA. Whereas SCA × E was also significant for number of effective tillers per plant and grain yield per plant revealed influence of environment on SCA. The variance due to GCA was higher than their respective SCA for all characters except number of grains per spike indicating that additive type of gene action played role in the expression of all these traits. Significant GCA effects for grain yield and its component traits were exhibited by the parents HD 2987, Lok 1 and HI 1544. Fourteen crosses recorded showed significant SCA effects for grain yield and related traits.

scholarly journals Combining ability analysis for grain yield and its attributes in Rice (Oryza sativa L.)

2014 ◽  
Vol 12 (1) ◽  
pp. 1-8
Author(s):  
BP Mallikarjuna ◽  
N Shivakumar ◽  
J Devendrappa ◽  
VD Sheela ◽  
G Bharamappa ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Combining Ability ◽  
Gene Action ◽  
Oryza Sativa L ◽  
Breeding Strategy ◽  
Rice Breeding ◽  
Additive Gene Action ◽  
Combining Ability Analysis ◽  
Additive Gene

Combining ability on grain yield and its components from line × tester analysis of thirty rice hybrids (Oryza sativa L.) produced by crossing three newly developed CMS lines and ten testers of local origin were studied. The analysis revealed higher SCA variance than GCA variance for all the characters except plant height indicating the prevalence of non-additive gene action. The line KCMS 45A and testers MSN 36 and KMR 3 were the good general combiners for yield and its major contributing characters. MSN 99 was the only good general combiner among the male parents for earliness and dwarfness. The hybrids KCMS 46A × MSN 75, KCMS 44A × KMR 4 and KCMS 45A × KMR 3 were identified as potential hybrids for yield contributing characters based on SCA effects which could be exploited in future rice breeding programme by adopting heterosis breeding strategy. The contribution of testers towards the total variance was found higher than lines and line x tester interaction suggesting predominant of testers influence for these characters. DOI: http://dx.doi.org/10.3329/sja.v12i1.21107 SAARC J. Agri., 12(1): 1-8 (2014)

Response of wheat to post-anthesis water stress, and the nature of gene action as revealed by combining ability analysis

2017 ◽  
Vol 68 (6) ◽  
pp. 534 ◽  
Author(s):  
Md Sultan Mia ◽  
Hui Liu ◽  
Xingyi Wang ◽  
Zhanyuan Lu ◽  
Guijun Yan
Keyword(s):  
Water Stress ◽  
Grain Yield ◽  
Combining Ability ◽  
Gene Action ◽  
Relative Reduction ◽  
Stressed Condition ◽  
Additive Gene Action ◽  
Narrow Sense Heritability ◽  
Combining Ability Analysis ◽  
Additive Gene

Post-anthesis water stress is a major limitation to wheat grain yield globally. Understanding the nature of gene action of yield related traits under post-anthesis water stress will help to breed stress-resilient genotypes. Four bread wheat genotypes having varying degree of drought tolerance were crossed in a full-diallel fashion and the resultant crosses along with the parental genotypes, were subjected to water stress after the onset of anthesis in order to investigate their comparative performance and nature of gene action. Parental genotypes Babax (B) and Westonia (W) performed better compared with C306 (C) and Dharwar Dry (D) with respect to relative reduction in grain yield and related traits under stressed condition. Direct cross B × D and reciprocal cross W × C were more tolerant to water stress, while cross between C306 and Dharwar Dry, either direct or reciprocal, produced more sensitive genotypes. Combining ability analysis revealed that both additive and non-additive gene action were involved in governing the inheritance of the studied traits, with predominance of non-additive gene action for most of the traits. Among the parents, Babax and Westonia were better combiners for grain yield under stress condition. B × D in stressed condition, and C × W in both stressed and stress-free conditions, were the most suitable specific crosses. Moreover, specificity of parental genotypes as female parents in cross combination was also evident from the significant reciprocal combining ability effects of certain traits. Low to medium narrow sense heritability and high broad sense heritability were observed for most of the studied traits in both well watered and water stress conditions. The results of the study suggested that specific cross combinations with high specific combining ability involving better performing parents with high general combining ability may generate hybrids as well as segregating populations suitable for further breeding programs.

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