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Genetic and Genotype × Environment Interaction Effects for Appearance Quality of Rice

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Agricultural Sciences in China 2009年第8期8卷 891-901页

作者： Sharifi Peyman Dehghani Hamid Mumeni Ali Moghaddam Mohammad Department of Plant Breeding Faculty of Agriculture Tarbiat Modares University Rice Research Institute of Iran (RRII) Department of Agronomy and Plant Breeding Faculty of Agriculture Tabriz University

This study was conducted to generate genetic information in rice varieties based on a complete diallel crosses over two years. The results indicated that genotype effect was significant for all traits. Genotype × environment interaction effects were significant only for cooked grain length （CGL） and cooked grain shape （CGSH）. General combining ability （GCA） and specific combining ability （SCA） effects were significant for entire traits, which indicated the important roles of both additive and non-additive gene actions. GCA x environment interaction effects were significant for CGL, CGSH and grain elongation index （GEI）. In the controlling of the inheritance of milled grain shape （GSH）, milled grain width （MGW）, GEI, milled grain length （MGL）, CGSH and cooked grain width （CGW）, the additive gene effects were more important than non-additive one. The average degree of dominance was within the range of partial dominance for all of the traits. The narrow-sense heritability was ranged from 0.65 （GSH） to 0.36 （CGL）. GCA effects were significant for all of the parents in milled grain length and it was significant for some of the parents in other traits. The crosses of Deilmani × IRFAON-215 exhibited significant SCA for GEI. The positive mean of heterosis was observed for CGW. The highest maximum values of heterosis were revealed in GEI, flowed by GSH, MGW and CGW. GCA and MPV were significantly and positively correlated together for all traits.

关键词： appearance quality diallel analysis genetic main effects environment interaction milling quality rice

Genetics of seed flavonoid content and antioxidant activity in cowpea(Vigna unguiculata L. Walp.)

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The Crop Journal 2016年第5期4卷 391-397页

作者： Maina Antoine Nassourou Yanou Nicolas Njintang Tchiagam Jean-Baptiste Noubissié Richard Marcel Nguimbou Joseph Martin Bell Department of Biological Sciences Faculty of Science University of Ngaoundéré Department of Food Science and Nutrition ENSAI University of Ngaoundéré Genetics and Plant Breeding Unit Department of Plant Biology Faculty of Science University of Yaoundé I

Information about the type of gene action governing the inheritance of cowpea seed flavonoid content and antioxidant activity is prerequisite for starting an effective breeding program for developing improved varieties. For this purpose, half-diallel crosses among seven diverse parents were made. The homozygous parents and 21 F1 hybrids were evaluated at Maroua in the Sudano-Sahelian zone of Cameroon using a randomized complete block design with three replicates. Flour samples produced from decorticated seeds were used for biochemical analysis. analysis of variance showed significant differences(P < 0.001) among genotypes for the studied traits with ranges of 363.6–453.9 mg rutin equivalent per 100 g dry weight(DW) for total flavonoids, 13.38–30.73 mg ascorbic acid equivalent per 1 g DW for ferric iron reducing activity, 70.98–266.93 mg trolox equivalent per 100 g DW for 2,2-diphenyl-1-picrylhydrazyl(DPPH) free radical scavenging activity, and 90.93–370.62 mg trolox equivalent per 100 g DW for 2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonic acid)(ABTS) free radical scavenging activity. Both additive and non-additive gene effects were significant in the genetic control of these traits, but dominance variance was greater than additive variance. The traits were mainly controlled by overdominance model suggesting a selection in the delayed ***- and narrow-sense heritability estimates varied from 0.90 to 0.99 and from 0.12 to 0.45,respectively. The variances due to both general and specific combining ability were highly significant for all studied traits. Recessive alleles had positive effects on DPPH and ABTS scavenging activities, whereas dominant alleles had positive effects on flavonoid content and ferric iron reducing activity. These results could help cowpea breeders to improve the antioxidant potential of cowpea seeds by appropriate selection.

关键词： Cowpea Genetic improvement diallel analysis Antioxidant properties

Combining ability and gene action studies for yield and fibre traits in Gossypium arboreum using Griffings numerical and Haymans graphical approach

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棉花研究(英文) 2023年第3期6卷 141-156页

作者： SUKRUTHA Bhimireddy RAJESWARI Sivakami PREMALATHA N. BOOPATHI Narayana Manikanda THIRUKUMARAN K. MANIVANNAN A. Department of Cotton Centre for Plant Breeding and GeneticsTamil Nadu Agricultural UniversityCoimbatoreIndia O/O Directorate of Research Tamil Nadu Agricultural UniversityCoimbatoreIndia Department of Agronomy Central Farm UnitTamil Nadu Agricultural UniversityCoimbatoreIndia ICAR-Central Institute of Cotton Research Regional StationCoimbatoreIndia

Background For the purpose of utilising hybrid vigour to produce possible hybrids with a suitable level of stability,the knowledge of gene activity and combining ability is a crucial prerequisite before choosing desirable *** present study was carried out with six parents crossed in full diallel fashion and generated 30 F1 *** hybrids were evaluated in two replications in Randomized Block Design at Department of Cotton,TNAU for combining ability and gene *** analysis was carried out according to Griffing’s method-I(parents + F_(1) + reciprocals) and model-I and Hayman’s graphical approach by using INDOSTAT *** analysis of variance for combining ability indicated that mean square values of GCA,SCA and reciprocals were highly significant for all the traits except for the uniformity ***763 and K12 showed highly positively significant GCA effects for most of the yield traits while PA838 and K12 for fibre quality traits,so they were found as best general ***379 × K12 and PDB29 × K12 for yield traits,and PDB29 × PA838,RG763 × PA838,and CNA1007 × RG763 cross combinations for fibre quality traits could be recommended for future breeding *** The results of both Griffing’s and Hayman’s approaches showed that non-additive gene action predominates as SCA variance was bigger than GCA variance,so heterosis breeding is thought to be a more fruitful option for enhancing GCA of many traits.

关键词： Gene action Combining ability diallel analysis Hayman’s approach Griffing’s approach Vr-Wr graph Desi cotton