Cross combinations revealed genotype

Major improvement in sunflower breeding requires heterotic hybrids which can be achieved by tapping combining ability of F1 hybrids developed from crossing of two genetically diverse female lines with male testers. In the present study, 56 hybrids were evaluated derived from four lines and fourteen testers’ crosses in a line × tester mating design. The analysis of variance revealed existence of highly significant differences (p=0.05) among genotypes, parents and parents vs crosses indicating the presence of heterosis for quantitative traits in sunflower.

12p caygaocaolon8 07-11-2020 16 2   Download

Nine diverse genotypes of bitter gourd (Momordica charantia L.) were crossed during summer season of 2015 in diallel design (excluding reciprocals).The resultant 36 hybrids along with the parents were evaluated in randomized block design with three replications during Kharif 2015 at Horticulture farm, S.K.N. College of Agriculture, Jobner. Each parents/F1 were sown in furrow maintaining 2.25m x 0.75m spacing. The analysis of variance for experimental design revealed the existence of adequate genetic variability in experimental material for all traits under study.

8p nguaconbaynhay8 13-10-2020 30 1   Download

A set of 24 cross combinations were developed through Line × Tester mating system involving 11 diverse genotypes of tomato and observations were taken for yield and yield attributing characters to study the extent of heterosis in the crosses. Tomato is an autogamous crop and has originated in the Peru region of South America. The experiment was conducted in Randomized Complete Block Design (RCBD) with three replications.

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To magnitude of heterosis for yield and quality traits was carried out in bitter gourd during Kharif-2016, Kharif-2017 and Kharif-2018, with fifteen diversified genotypes, three testers and their commercial check (Pusa Do Mausami) to developed 45 hybrids (F1s) following by the Line × Tester mating design using for various yield and quality traits at Vegetable Research Farm, Department of Horticulture, Institute of Agricultural Sciences, BHU, Varanasi (UP).

12p quenchua4 06-04-2020 17 1   Download

9 diverse barley genotypes were selected and crossed in a diallel (without reciprocals) mating design to evaluate combining ability effects to identify promising crosses for 13 quantitative characters including yield and its components. Analysis of variance for diallel revealed highly significant differences for most of the traits investigated. Parent BH 393 has been excellent general combiner for majority of traits viz., days to 50 per cent heading, days to 75 per cent maturity.

8p trinhthamhodang4 22-03-2020 15 1   Download

Twenty one F1 crosses generated by crossing seven diverse mungbean genotypes viz., ML-267, LGG-528, MGG-390, WGG-42, AKM-9904, LM95 and EC-362096 in a 7  7 diallel fashion without reciprocals were evaluated for fourteen quantitative characters Heterosis studies conducted on relative heterosis, heterobeltiosis and standard heterosis revealed that the cross combinations viz., LM 95 × EC 362096, MGG 390 × LM 95 and ML 267 × LGG 528 were adjudged as the best for majority of the yield, water use efficiency and heat stress tolerant traits.

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Eight high yielding rice genotypes along with their twenty eight crosses which effected in a diallel fashion excluding reciprocals were subjected to combining ability which aimed at elucidating the genetic system underlying the inheritance of yield and quality traits. The study revealed predominance of non-additive gene action for most of the yield components and quality traits except straw yield/plant, which was under the control of additive gene action.

10p cothumenhmong4 23-03-2020 18 1   Download

Urdbean has narrow genetic base due to common ancestry of various superior genotypes, poor plant type and genetic vulnerability to biotic and abiotic stresses. The underutilized related specie, V. umbellata (ricebean), nutritive and resistant to most of the fungal pathogens, is speculated to be potential donor. Therefore, V. mungo and V. umbellata were crossed with a view to introgress alien genes. On inter-specific hybridization, the presence of pre-fertilization barriers and post-fertilization barriers were observed. As, hybrids exhibited reduced germination and sterility.

9p chauchaungayxua4 18-03-2020 13 2   Download

An 8 x 8 diallel cross mating design with the parents and F1s was used to estimate gene action and combining ability for yield and yield attributing traits in sesame (Sesamum indicum L.). Combing ability analysis revealed predominance of nonadditive gene action for all traits viz,. days 50% flowering, days to maturity, plant height, number of branches per plant, number of capsules per plant, length of capsule, width of capsule, 1000 seed weight, yield per plant and oil content which can be improved by bi-parental mating or reciprocal recurrent selection.

8p caygaocaolon2 11-03-2020 18 1   Download

The present investigation entitled “Genetic analysis of F1 hybrids in brinjal (Solanum melongena L.)” was carried out at Main Garden, Department of Horticulture, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. Eleven genotypes (Aruna, Bhandara local, Wadsa local, Bhatai local, Manjarigota, Chandur local, Ruchira, Krishna Kathi, White Round, DBSR-52, White Brinjal) were crossed in line x tester mating design during kharif 2013.

7p cothumenhmong3 22-02-2020 18 1   Download

Ten genotypes as lines and three genotypes as testers of mungbean were investigated for combining ability analysis through crosses developed into line x tester passion. The study revealed that the gene action involved in controlling traits viz., plant height, number of pods per plant, number of seeds per pod and grain yield per plant was non-additive; while the characters viz., number of branches per plant and 100-grain weight had additive gene action. Genotype KM 2264 was found good general combines for most of the yield attributing traits.

6p cothumenhmong3 22-02-2020 25 0   Download

Line x Tester analysis mean sum of square due to genotypes was highly significant for all the traits in E1, E2 and E3. Analysis of variance for combining ability revealed that the variance due to gca were highly significant for all the characters in all the environments except for days to maturity in E1, plant height and primary branches plant-1 in E1, E2 and E3, secondary branches, seed yield and harvest index in E2 and E3, pods plant-1 in E1 and E2, biological yield plant-1 in E2 and protein content in E1.

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The present investigation carried out on “variability, heritability and genetic advance analysis in relation to selection of parental lines in brinjal (Solanum melongena L.)” at Horticultural Research Centre of Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut. The experimental material comprised of eight parental lines namely, K.S-331, DBL-24, A. Abhilomb, A. Parthibha, J.B.-6, F.Collection-2, J.B.L.-03-04 and Assury along with twenty eight F1crosses which were produced by the parents.

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In the present investigation 7 parents and 21 F1 hybrids of field pea were evaluated in a randomized complete block design in three replication to estimate combining ability of genotypes by using diallel fashion for the yield and yield attributing characters at instructional farm of Indira Gandhi Krishi Vishwavidyalaya, Raipur during the Rabi December 2017 to March 2018.

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The recombinant inbred lines (RILs) serve as useful source of pure-lines with desired combination of traits. Also, the chances of recovering high-yielding genotypes from RIL population are higher than those recoverable from F2 populations handled through pedigree breeding. The 157 RILs derived from HACPI 3and 144 RILs derived from HACPI 6 and three check entries [HA 3, HA 4 and kadalavare] of dolichos bean were evaluated for six qualitative traits and nine quantitative traits at the University of Agricultural Sciences (UAS), Bengaluru, India, during 2014 and 2015 rainy seasons.

12p cothumenhmong1 11-12-2019 16 1   Download

The investigation was carried out to study the general combining ability and specific combining ability in genotypes and their cross combinations for yield and quality characters. Six tomato lines, fifteen cross combinations derived from 6×6 half diallel fashion with Arka Rakshak as check cultivar/line were taken for the experiment.

6p cothumenhmong1 08-12-2019 16 0   Download

The present investigation entitled “Estimation of combining ability effect in mungbean (Vigna radiata (L.) Wilczek) was carried out at College of Agricultural, Kharpudi, during kharif 2016 and 2017. The material for the present investigation comprised ten parents BPMR 182, BPMR 132, BPMR 21, BPMR 126, BPMR 75 and BPMR 38. Four varieties as females are BM 2002-1, BM 4, JL 781 and AKM 4. Were crossed in Line x Tester fashion to estimate the combining ability for yield and yield attributing traits in mungbean.

7p cothumenhmong1 08-12-2019 19 1   Download

Line x Tester analysis was performed by employing fourteen tomato genotypes (10 lines and 4 testers) to develop 40 hybrids. These hybrids along with parental lines and commercial check Naveen 2000+ were evaluated to know the extent of heterosis exhibited to different yield and yield attributing traits. Results revealed that nine hybrid combinations produced significantly increased heterotic effect over the better parent.

10p chauchaungayxua1 04-12-2019 17 0   Download