N. Manivannan

Tamil Nadu Agricultural University

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V. Muralidharan

Tamil Nadu Agricultural University

P. Vindhiyavarman

Tamil Nadu Agricultural University

A. Mahalingam

Tamil Nadu Agricultural University

R. Chandirakala

Tamil Nadu Agricultural University

R. Prabhu

Tamil Nadu Agricultural University

A. Mothilal

Krishi Vigyan Kendra, Ghatkhed Amravati

S. Ragul

Tamil Nadu Agricultural University

S. Harish

Tamil Nadu Agricultural University

V.K. Satya

Tamil Nadu Agricultural University

C. Vanniarajan

Tamil Nadu Agricultural University

Cooperative Institutions

Tamil Nadu Agricultural University

254

Indian Council of Agricultural Research

Indian Institute of Pulses Research

Annamalai University

International Crops Research Institute for the Semi-Arid Tropics

Institute of Forest Genetics and Tree Breeding

Dr. Y.S.R Horticultural University

SRM Institute of Science and Technology

Horticultural Research Institute

Directorate of Groundnut Research

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Genetic diversity in cross derivatives of greengram [Vigna radiata (L.) Wilczek]

Legume Research - An International Journal (2002)

N. Manivannan

Genetic diversity in greengram [Vigna radiata (L.) Wilczek] from 33 genotypes derived from ten crosses was analysed using multivariate analysis. Existence of substantial amount of diversity was observed. The genotypes were grouped into seven clusters. The pattern of clustering showed that the pedigree of the genotypes influenced the generalised distance (D) values by grouping into same cluster and also the genotypes were placed in closely related clusters. The clusters II and VI, V and VII and VI and VII were highly divergent. The genotypes VGG 13, VGG 20, VGG 26, VGG 28, VGG 85, VGC 88 and VGG 90 may be included in the hybridization programme. Among the characters studied, lOO-seed weight followed by powedery mildew reaction contributed the most towards the total divergence.

Radiata

Genetic divergence

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Citations (13)

Evaluation of sunflower genotypes for Alternaria disease resistance to identify the resistant genotypes

International Journal of Chemical Studies (2021)

M. Mallik N. Manivannan

Alternaria leaf spot caused by Alternaria helianthi has been considered as economically important disease. The present study was carried out to identify resistant or moderately resistant genotypes against the Alternaria leaf spot in field screening and artificial screening. Out of 115 genotypes screened in field 31 genotypes were moderately resistant, 60 genotypes were susceptible whereas 24 genotypes were highly susceptible. Resistance to Alternaria is reported to exhibit differential reactions with the environment, hence field screening alone is insufficient while choosing genotypes for further resistance breeding programme. Therefore genotypes which showed moderate resistance (31) and high susceptibility (24) were screened artificially, along with 4 checks. Moderate resistant reaction for Alternaria leaf blight disease was observed in 1B, COSF 7B, CSFI 5083, CSFI 5181, CSFI 5213, CSFI 5276, CSFI 5292, CSFI 5336, POP 449-1-2-4, CSFI 13034, CSFI 13043 and TNHSF 239-68-1-1-1, when artificially screened. These genotypes may be evaluated in hot spot areas along with the resistant check to confirm their disease reaction. Hence these genotypes are considered as potential parents for Alternaria resistance breeding programme.

10.22271/chemi.2021.v9.i1v.11438

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PATH COEFFICIENT-ANALYSIS IN CASHEW

Agricultural science digest (2001)

R. Swarna Piria N. Manivannan

Eleven characters namely collar girth of the tree, leaf length, leaf breadth, panicle length, panicle breadth, number of nuts/panicle. apple length, apple girth, apple weight, single nut weight and nut yield/tree were recorded on six genotypes of cashew. The correlation analysis showed that characters, collar girth, leaf length and number of nuts/panicle had significantly positive association with nut yield/tree. The path analysis revealed that collar girth, panicle breadth, number of nuts/panicle, apple weight and nut weight had high or very high direct effect on nut yield/tree. Most of the characters had high positive indirect effect through collar girth and high negative indirect effect through apple weight on nut yield/tree. Hence, the characters collar girth, panicle breadth, number of nuts/panicle, apple weight and nut weight should be considered as selection indices in the cashew improvement programme.

Panicle

Girth (graph theory)

Collar

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Genetic divergence of inbred lines in sunflower (Helianthus annuus L.)

Electronic Journal of Plant Breeding (2012)

Gopal Dan N. Manivannan P. Vindhiyavarman

Genetic divergence of 79 inbred lines of sunflower using eight agronomic characters was studied. Analysis of variance revealed the existence of divergence among the inbred lines. Mahalanobis D2 statistics indicated the presence of substantial genetic diversity. Based on intercluster D2 value and cluster mean for various characters, potential inbred lines were identified. Intercrossing of these inbreds will exhibit more variability for yield and yield component traits. The character oil yield was found to be important as the major contributor for genetic divergence. The usefulness of genetic divergence for the identification of parents for heterosis breeding is not proved and needs further research.

Inbred strain

Genetic divergence

Helianthus annuus

Mahalanobis distance

Divergence (linguistics)

Genetic distance

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Assessment of Combining Ability Analysis for Pod Yield and its Attributing Traits in Groundnut (Arachis hypogaea L.)

Agricultural Science Digest - A Research Journal (2024)

G. Venkateswara Rao M. Pandiyan N. Manivannan C. N. Chandrasekhar C. Harisudan

Background: Groundnut is a globally significant oil crop. It possesses diversity in the nutritional and medicinal values. Groundnut kernels contain 48%-50% oil, 26%-28% protein and vitamins B and E. Continuous efforts to enhance groundnut productivity is the main driving force for the current study. Methods: Line × Tester analysis was carried out to estimate the gene action of yield and its attributing traits for their improvement. Seven lines viz., VRI 7, VRI 8, VRI 9, VRI 10, K 6, GG 7 and CO 7 and eight testers viz., IGCV 15402, IGCV 15412, IGCV 15432, IGCV 15427, IGCV 15426, IGCV 15408, IGCV 15410 and IGCV 15388 were crossed to obtain 56 crosses. GCA and SCA variance revealed the importance of both additive and non-additive gene action of all the traits. Result: The study observed significantly higher specific combining ability (SCA) variances compared to general combining ability (GCA) variances, indicating a predominant role of non-additive gene action in trait control. Line VRI 7 was observed best GCA, particularly for pod yield and other traits making it a promising variety for pod yield enhancement programs in the future. The SCA for hybrid VRI 8 × ICGV15426 and VRI 7 × ICGV15402 revealed superior performance in terms of pod yield per plant. Notably, the VRI 7 × ICGV15402 cross exhibited outstanding performance across all traits, highlighting the prominence of a parent with strong GCA. The study recommends early-generation selection as a strategic approach for improving groundnut breeding efforts.

Arachis hypogaea

10.18805/ag.d-5929

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Studies on morpho-metric traits in some triploids of Arachis

Journal of Oilseeds Research (2017)

A MOTHILAL N. Manivannan Luke Rathnakumar A. Ezhil

Four triploids viz., Arachis hypogaea L. Cv. VRI 3 x A. diogoi, A. hypogaea L. Cv. VRI 3 x A. benensis, A.hypogaea L. Cv. JL 24 x A. diogoi and A. hypogaea L. Cv. JL 24 x A. benensis were studied along with their respective parents for various vegetative and reproductive traits. Most of the triploids are erect in growth habit with reduced petiole length, stipule length and leaflet size. The triploids produced few flowers with orange standard petals. Pollen fertility percentage ranged from 5.0 to 6.5 in the triploids.

Morpho

Arachis

10.56739/jor.v34i4.137811

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Molecular breeding for introgression of fatty acid desaturase mutant alleles ( ahFAD2A and ahFAD2B ) enhances oil quality in high and low oil containing peanut genotypes

Plant Science (2015)

Pasupuleti Janila Manish K. Pandey Yaduru Shasidhar Murali T. Variath Manda Sriswathi

High oleate peanuts have two marketable benefits, health benefits to consumers and extended shelf life of peanut products. Two mutant alleles present on linkage group a09 (ahFAD2A) and b09 (ahFAD2B) control composition of three major fatty acids, oleic, linoleic and palmitic acids which together determine peanut oil quality. In conventional breeding, selection for fatty acid composition is delayed to advanced generations. However by using DNA markers, breeders can reject large number of plants in early generations and therefore can optimize time and resources. Here, two approaches of molecular breeding namely marker-assisted backcrossing (MABC) and marker-assisted selection (MAS) were employed to transfer two FAD2 mutant alleles from SunOleic 95R into the genetic background of ICGV 06110, ICGV 06142 and ICGV 06420. In summary, 82 MABC and 387 MAS derived introgression lines (ILs) were developed using DNA markers with elevated oleic acid varying from 62 to 83%. Oleic acid increased by 0.5-1.1 folds, with concomitant reduction of linoleic acid by 0.4-1.0 folds and palmitic acid by 0.1-0.6 folds among ILs compared to recurrent parents. Finally, high oleate ILs, 27 with high oil (53-58%), and 28 ILs with low oil content (42-50%) were selected that may be released for cultivation upon further evaluation.

Introgression

Molecular breeding

Fatty acid desaturase

Marker-Assisted Selection

10.1016/j.plantsci.2015.08.013

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Citations (151)

ASSOCIATION ANALYSIS IN SEGREGATING GENERATIONS OF GREENGRAM [VIGNA RADIATA (L.) WILCZEK]

Legume Research - An International Journal (2002)

N. Manivannan

Studies on correlation between yield and yield components studied in eight F3 populations of greengram revealed that clusters. pods/cluster and pods would be more appropriate for yield improvement than other characters. However, as the association between characters varied with the crosses. formulation of separate discriminant function is suggested for efficient selection programme.

Radiata

Discriminant function analysis

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A new high yielding Spanish bunch groundnut variety CO 7 (ICGV 00351) for the drought prone areas of Tamil Nadu.

Electronic Journal of Plant Breeding (2014)

P. Vindhiyavarman S. N. Nigam Pasupuleti Janila M. Vaidhyalingan N. Manivannan

A high yielding Spanish bunch groundnut culture ICGV 00351 (a cross derivative of ICGV 87290 X ICGV 87846) developed at ICRISAT (International Crops Research Institute for the Semi-Arid Tropics), Patancheru, Andhra Pradesh was evaluated along with six other promising varieties in drought prone areas of Tamil Nadu under Farmers’ Participatory Varietal Selection Trials. Culture ICGV 00351 recorded an overall mean dry pod yield of 2189 kg/ha under rainfed situation. This culture with duration of 105 to 110 days registered a pod yield increase of 17 and 26 per cent over the popular varieties of this region viz., VRI (Gn) 6 and TMV (Gn) 13 respectively. It has 71% shelling and 51 % oil and 22% protein content. This culture has also showed tolerance reaction to major foliar diseases viz., late leaf spot and rust. As this variety has improved pod yield along with consumer and trader preference, this culture ICGV 00351 has been released as CO 7 for cultivation in the entire state of Tamil Nadu.

Non-invasive ventilation

Tamil

Arachis hypogaea

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Citations (3)

Variability studies in F₃ populations of sun flower

Electronic Journal of Plant Breeding (2017)

R. Chandirakala S. Abirami Ameena Premnath N. Manivannan

Two populations in F3 generation developed from cross between low oleic inbreds (COSF 1B and TNHSF 239-61-2-2-1) and high oleic (HO 5-13) inbred were studied to assess genetic variability among oil yield and its component traits. High PCV and GCV were recorded for oil yield and single plant yield in F3 population of COSF 1B x HO 5-13. Similarly, high PCV was also noticed for oil yield and single plant yield in F3 population of TNHSF 239-61-2-4-1 x HO 5-13. This revealed the presence of substantial magnitude of genetic variability in the experimental material and better scope for improvement of these traits. High heritability (˃60%) coupled with high genetic advance as per cent of mean (˃20%) was recorded by the traits viz. plant height, 100- seed weight, single plant yield, oleic acid content and oil yield in both populations. Non-significant skewness and kurtosis were observed for most of the oil yield contributing traits in both the populations indicating that the genotypes in the population exhibited normal distribution for the traits under study. Highly heritable characters viz. plant height, 100- seed weight, volume weight, single plant yield and oil yield could be improved through individual plant selection in subsequent generations. Hence selection based on these characters would contribute for the improvement of oil yield in sunflower.

Genetic Variability

10.5958/0975-928x.2017.00177.6

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Citations (1)