GENETIC BEHAVIOR AND COMBINING ABILITY FOR SOME TRAITS OF ROOT, PHYSIOLOGICAL AND GRAIN QUALITY TRAITS IN RICE UNDER WATER STRESS CONDITIONS

Twenty eight crosses generated using eight aromatic rice varieties crossed in half diallel fashion were evaluated and analyzed along with parents to investigate combining ability and gene action for grain yield and various grain quality traits. The general combining ability and specific combining ability variances were significant for all the traits that indicated the role of both additive and non-additive genetic components. Ratio of σ2gca/σ2sca< 1 indicated preponderance of non-additive gene action in the expression of these traits. Pusa Basmati-1 was the good general combiner showing significantly high GCA effect for a maximum of seven-grain quality traits viz., milling recovery (0.81), kernel length (0.28), kernel breadth (-0.05), kernel length/breadth ratio (0.26), cooked kernel length (0.79), alkali digestion value (0.67) and amylose content (0.60) but not for yield. Cross PSD-15×Pant Basmati-1 (P7×P8) was the good specific combiner showing high SCA effects for a maximum of eight grain quality traits viz. hulling recovery (2.76), milling recovery (2.06), kernel length (0.89), kernel length/breadth ratio (0.69), cooked kernel length (3.06), kernel elongation ratio (0.12), alkali digestion value (1.11) and amylose content (1.01) but not yield. None of the top three crosses (Pusa Sugandh-6×PSD-15, Pusa Basmati-1×PSD-15 and Pusa Sugandh-4×Basmati-370) based on high SCA effect for grain yield plant-1exhibited as high SCA effect to fall within top three crosses on that basis for any of the grain quality traits.

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Combining ability analysis and gene action of grain quality traits in rice (Oryza sativa L.) using line × tester analysis

Journal of Applied and Natural Science ◽

10.31018/jans.v9i2.1350 ◽

2017 ◽

Vol 9 (2) ◽

pp. 1236-1255

Author(s):

S. Santha ◽

R. Vaithilingam ◽

A. Karthikeyan ◽

T. Jayaraj

Keyword(s):

Combining Ability ◽

Volume Expansion ◽

Grain Quality ◽

Gene Action ◽

Amylose Content ◽

Expansion Ratio ◽

Quality Traits ◽

Gelatinization Temperature ◽

Probability Level ◽

Kernel Length

In rice, twelve lines were crossed with five testers in a line × tester mating design and the resultant 60 hybrids along with their parents were evaluated for their combining ability effects for 15 grain quality traits. The results revealed that the ratio of GCA: SCA variances computed for all the fifteen grain quality traits showed the predominance of non-additive gene action. Among the lines, ADT (R) 47 showed significant desirable gca effects at 1% probability level (p = 0.01) for 11 grain quality traits viz., hulling percentage, milling percentage, head rice recovery percentage, kernel breadth, kernel breadth after cooking, breadth wise expansion ratio, gelatinization temperature, amylose content, gel consistency, water uptake and volume expansion ratio. Among the testers, Pusa 1460 showed significant desirable gca effects at 1% probability level (p = 0.01) for 10 grain quality traits viz., kernel length, kernel breadth, kernel length/breadth ratio, kernel length after cooking, kernel breadth after cooking, linear elongation ratio, gelatinization temperature, amylose content, water uptake and volume expansion ratio and hence they were adjudged as the best combiners for the improvement of the respective traits. Among the hybrids, the hybrids CO 47/Imp., Samba Mahsuri, ADT (R) 47/IRBB 21 and ADT (R) 46/IRBB 21 were identified as best hybrids for exploitation of grain quality traits since they revealed significant sca effects at 1% probability level (p = 0.01) for eight, eight and five grain quality traits, respectively.

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Effects of Heat Stress on Growth, Physiology of Plants, Yield and Grain Quality of Different Spring Wheat (Triticum aestivum L.) Genotypes

Sustainability ◽

10.3390/su13052972 ◽

2021 ◽

Vol 13 (5) ◽

pp. 2972

Author(s):

Muhammad Waheed Riaz ◽

Liu Yang ◽

Muhammad Irfan Yousaf ◽

Abdul Sami ◽

Xu Dong Mei ◽

...

Keyword(s):

Heat Stress ◽

Grain Yield ◽

Combining Ability ◽

Grain Quality ◽

Block Design ◽

Stress Conditions ◽

Specific Combining Ability ◽

Growth Stages ◽

Wheat Genotypes ◽

Parental Lines

Heat stress is one of the major threats to wheat production in many wheat-growing areas of the world as it causes severe yield loss at the reproductive stage. In the current study, 28 crosses were developed using 11 parental lines, including 7 female lines and 4 male testers following line × tester matting design in 2018–2019. Twenty-eight crosses along with their 11 parental lines were sown in a randomized complete block design in triplicate under optimal and heat stress conditions. Fifteen different morpho-physiological and grain quality parameters were recorded at different growth stages. Analysis of variance illustrated the presence of highly significant differences among wheat genotypes for all traits under both optimal and heat stress conditions. The results of combining ability unveiled the predominant role of non-additive gene action in the inheritance of almost all the studied traits under both conditions. Among parents, 3 parental lines WL-27, WT-39, and WL-57 showed good combining ability under both normal and heat stress conditions. Among crosses, WL-8 × WT-17, WL-37 × WT-17, WL-7 × WT-39, and WL-37 × WT-39 portrayed the highest specific combining ability effects for grain yield and its related traits under optimal as well as heat stress conditions. Biplot and cluster analysis confirmed the results of general and specific combining ability by showing that these wheat crosses belonged to a highly productive and heat tolerant cluster. Correlation analysis revealed a significantly positive correlation of grain yield with net photosynthetic rate, thousand-grain rate, and the number of grains per spike. The designated parental lines and their crosses were selected for future breeding programs in the development of heat resilient, climate-smart wheat genotypes.

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Performance and Combining Ability of Some Agronomic Traits of Bread Wheat Under Normal and Water Stress Conditions

Assiut Journal of Agricultural Sciences ◽

10.21608/ajas.2018.26820 ◽

2018 ◽

Vol 49 (4) ◽

pp. 1-14

Author(s):

Kamal Abdu Abdel-Ghani Khair Allah ◽

M. Habouh ◽

E Hassaballa ◽

H Abo-Sapra ◽

A. ahmed

Keyword(s):

Water Stress ◽

Bread Wheat ◽

Combining Ability ◽

Agronomic Traits ◽

Stress Conditions

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Analysis of Per Se and Genetic Diversity of Maize Synthetic Populations for Grain Quality: Implications for Breeding

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca Agriculture ◽

10.15835/buasvmcn-agr:5025 ◽

2010 ◽

Vol 67 (1) ◽

Author(s):

Voichita HAS ◽

Alin GULEA ◽

Ioan HAS ◽

Ana COPANDEAN

Keyword(s):

Genetic Diversity ◽

Combining Ability ◽

Grain Quality ◽

Agronomic Traits ◽

Agricultural Research ◽

Research Station ◽

Quality Traits ◽

Maize Germplasm ◽

Synthetic Populations ◽

Per Se

The objective of this research was to determine whether phenotypic and genetic diversity could be identified for maize grain quality traits (percentage of starch, protein, oil, fiber and ash) and agronomic traits. 59 maize synthetic populations which differed in earliness and for geographic origins were evaluated in the field at the Agricultural Research Station Turda - Romania, for their per se value. Each synthetic population was tested only one year and was characterized for their ear characteristics and grain quality attributes. The grain oil and ash content showed high variability among genotypes. The experiment was conducted over 2 years (2006-2007) and 2 locations (Turda and Targu-Mures). Analysis of variance showed significant differences among the genotypes for all traits studied. General combining ability (GCA) effects were more important for grain content than specific combining ability (SCA). The occurrence of low interactions between synthetic populations and testers for all characters suggested the occurrence of high statistical additive effects expressed whatever the system of population evaluation. These results support breeding effort towards the genetic improvement of grain quality traits in “Turda” maize germplasm.

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