Evaluating the Genetic Variations Among Improved Haricot Bean Varieties (&lt;i&gt;Phaseolus vulgaris&lt;/i&gt; L.) Based on Their Agronomic Traits and Performing Their Half Diallel Cross

Combining ability and heterosis were studied in a 7×7 half diallel cross in maize for grain yield and yield contributing characters. Significant general and specific combining ability variances were observed for all the characters studied. The significant estimates of GCA and SCA variances suggested the importance of both additive and non-additive gene actions for the expression studied traits. In these studies, variances due to SCA were higher than GCA for all charactesr, which revealed the predominance of non additive gene action (dominance and epistasis) for controlling these traits. Parents P1 and P4 were excellent general combiner for days to tasseling and silking while P1 and P5 for early maturity. P4 for short height and, P4 and P7 for higher thousand kernel weight. The parents P4 and P6 having good combining abilities for yield. Heterosis estimation was carried out using two commercial varieties NK40 and 900MG. When standard commercial check NK40 was used, the percent heterosis for kernel yield varied from -51.39 to 12.53%. Among the 21 F1s, 3crosses exhibited significant positive heterosis for kernel yield. The highest heterosis was exhibited by the cross P4×P6 (12.43%), P6×P7 (10.89%) and P2×P3 (9.87%) respectively. Compared with 900MG as check, the percent heterosis for kernel yield varied from -53.73 to 7.01%. Among the 21 F1s, none of the crosses exhibited significant positive heterosis for kernel yield. The highest heterosis were exhibited by the crosses P4×P6 (7.01%), P6 x P7 (5.55%) and P2×P3 (4.57%). The crosses showed significant positive SCA values could be used for variety development after verifying them across the agro-ecological zones of Bangladesh.Bangladesh J. Agril. Res. 41(3): 565-577, September 2016

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Genetic Analysis of Half Diallel Matting with Different Methods and their Comparisons for Yield and its Associated Traits in Sunflower under Saline Soil Stress Conditions

Helia ◽

10.1515/helia-2017-0001 ◽

2017 ◽

Vol 40 (66) ◽

Cited By ~ 1

Author(s):

Mohamed Ali Abd El-Satar

Keyword(s):

Genetic Analysis ◽

Agricultural Research ◽

Saline Soil ◽

Block Design ◽

Diallel Cross ◽

Head Diameter ◽

Physiological Maturity ◽

Randomized Complete Block Design ◽

Soil Stress ◽

Half Diallel

AbstractA half diallel cross between five divergent sunflower genotypes was evaluated under two contrast locations of Kafr El-Hamam (fovourable soil as a control) and Tag Al-Ezz (as salt affected soil) Agricultural Research Stations using randomized complete block design with three replications. High significance variation among genotypes and their components was detected for all studied traits at both and combined locations. Selection in early generations would be effective at both locations for improving days to 50 % flowering, days to physiological maturity, plant height, head diameter, No. of green leaves plant

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Global Analysis of the Genetic Variations in miRNA-Targeted Sites and Their Correlations With Agronomic Traits in Rapeseed

Frontiers in Genetics ◽

10.3389/fgene.2021.741858 ◽

2021 ◽

Vol 12 ◽

Author(s):

Pengfei Xu ◽

Yantao Zhu ◽

Yanfeng Zhang ◽

Jianxia Jiang ◽

Liyong Yang ◽

...

Keyword(s):

Mirna Target ◽

Target Genes ◽

Rare Variants ◽

Agronomic Traits ◽

Global Analysis ◽

Variant Calling ◽

Genetic Variations ◽

Nucleotide Polymorphisms ◽

A Genome ◽

Target Sites

MicroRNAs (miRNAs) and their target genes play vital roles in crops. However, the genetic variations in miRNA-targeted sites that affect miRNA cleavage efficiency and their correlations with agronomic traits in crops remain unexplored. On the basis of a genome-wide DNA re-sequencing of 210 elite rapeseed (Brassica napus) accessions, we identified the single nucleotide polymorphisms (SNPs) and insertions/deletions (INDELs) in miRNA-targeted sites complementary to miRNAs. Variant calling revealed 7.14 million SNPs and 2.89 million INDELs throughout the genomes of 210 rapeseed accessions. Furthermore, we detected 330 SNPs and 79 INDELs in 357 miRNA target sites, of which 33.50% were rare variants. We also analyzed the correlation between the genetic variations in miRNA target sites and 12 rapeseed agronomic traits. Eleven SNPs in miRNA target sites were significantly correlated with phenotypes in three consecutive years. More specifically, three correlated SNPs within the miRNA-binding regions of BnSPL9-3, BnSPL13-2, and BnCUC1-2 were in the loci associated with the branch angle, seed weight, and silique number, respectively; expression profiling suggested that the variation at these 3 miRNA target sites significantly affected the expression level of the corresponding target genes. Taken together, the results of this study provide researchers and breeders with a global view of the genetic variations in miRNA-targeted sites in rapeseed and reveal the potential effects of these genetic variations on elite agronomic traits.

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GENE ACTION OF AGRONOMIC TRAITS IN RICE (Oryza sativa L.)

Bangladesh Journal of Plant Breeding and Genetics ◽

10.3329/bjpbg.v20i2.17033 ◽

2007 ◽

Vol 20 (2) ◽

pp. 31-36

Author(s):

P. S. Biswas ◽

M. Enamul Haque

Keyword(s):

Gene Action ◽

Agronomic Traits ◽

Oryza Sativa L ◽

Dominant Gene ◽

Recessive Gene ◽

Diallel Cross ◽

Thousand Grain Weight ◽

Dominance Model ◽

Partial Dominance ◽

Days To Heading

Six parent diallel cross without reciprocal was studied to investigate the genetic behavior of different agronomic traits in rice. The analysis of Wr-Vr graph showed that panicle length, thousand grain weight and grain yield per plant did not follow the additive-dominance model indicating epistatic gene action responsible for the expression of these traits. All other traits under the study were conditioned by overdominance gene action except grains per panicle, which was controlled by partial dominance. The Yr? (Vr + Wr)? graph revealed random distribution of dominant and recessive gene in expressing different traits in different parent, while correlation between parental mean and parental order of dominance indicated increasing effect of dominant gene for all the traits except days to heading and % spikelet sterility.DOI: http://dx.doi.org/10.3329/bjpbg.v20i2.17033

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GENOTYPE × ENVIRONMENT INTERACTIONS IN SMOOTH BROMEGRASS. I. YIELD

Canadian Journal of Genetics and Cytology ◽

10.1139/g79-008 ◽

1979 ◽

Vol 21 (1) ◽

pp. 57-63 ◽

Cited By ~ 2

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.

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