Journal of Horticultural Sciences

T. S. Dhillon ¹, Ajay Kumar ¹

Affiliations
1 Department of Vegetable Science, Punjab Agricultural University, Ludhiana-141001, IN

Abstract

Variability, heritability, correlation and genetic divergence were studied in 30 strains of dolichos bean (Lablab purpureus L.) for various growth and yield attributing parameters. High phenotypic and genotypic coefficient of variation was found in number of flowers per cluster, fresh green pod yield per plant, green pod yield per hectare, and mineral content. High heritability and expected genetic advance was found in number of flowers per cluster, vine length, weight of 10 green pods, fresh green pod yield per plant, and green pod yield per hectare. Genotypic correlation was higher than phenotypic correlation. Yield per plant was positively and significantly correlated with number of branches per plant, number of pods per cluster, number of pods per plant, weight of 10 green pods, number of clusters per plant, and number of flowers per cluster. For genetic divergence studies, the genotypes were grouped into 11 clusters on the basis of relative magnitude of D² values. Maximum intercluster distance was recorded between Clusters VII and I, indicating a wide diversity among these two clusters. Minimum intercluster distance was observed between Clusters IX and VIII, indicating their close relationship. Thus, Clusters VII and I were generally the most divergent from the other clusters. Intra-cluster value was highest for Cluster IX. Intra-cluster distance was least for Clusters VI and X. Among the genotypes, SC-5, SC-7, SC-11, SC-16 and SC-17 were the best in traits related to yield compared to the Check, PS-2.

Keywords

Dolichos Bean, Genetic Variability, Heritability, Genetic Advance, Genetic Divergence.

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Prabhjot Kaur ¹, V. K. Vashist ¹, Ajay Kumar ²

Affiliations
1 Department of Vegetable Science, Punjab Agricultural University, Ludhiana - 141 001, IN
2 Farm Advisory Service Scheme, Amritsar-143001, Punjab, IN

Abstract

The present study was undertaken to evaluate potato genotypes for their suitability for processing when grown under different crop durations, i.e., E₁ (80 days' crop duration), E₂ (100 days' crop duration) and E₃ (120 days' crop duration). Among the three durations studied, E₃ yielded the highest processing-grade yield (q/ha), followed by E₂ and E₁. The crop in E₃ also exhibited high dry-matter content and low levels of reducing sugars compared to that in the other crop durations, which is desirable for processing. Among the cultivars under study, Kufri Badshah, Kufri Anand, Kufri Bahar, Kufri Chipsona-1, Kufri Chipsona-2, Kufri Ashoka and Kufri Jawahar gave the highest total tuber-yield. However, for processing-grade yield, cvs. Kufri Badshah, Kufri Chipsona-1 and Kufri Jawahar yielded significantly better than the mean, but cv. Kufri Chipsona-1 was the one found suitable for processing due to its high dry-matter content (22.07%), while, the other cultivars were found suitable for table purpose alone. Though cv. Kufri Chipsona-1 yielded higher (309.39 q/ha), its performance could not be predicted under various conditions owing to the data on regression coefficient (being less than one), and a significant deviation from regression. Cultivars Kufri Chipsona-1 and Kufri Chipsona-2 were found to be suitable for processing, with high tuber- and processing-grade yield, high dry-matter content, low amount of reducing sugars and phenols in the crop durations E₂ and E₃. Both these cultivars produced chips of acceptable colour in all three crop durations.

Keywords

Potato, Genotypes, Autumn Season, Processing Quality.

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Rajiv Saini ¹, A. S. Sidhu ², Daljeet Singh ¹, Ajay Kumar ³

Affiliations
1 Department of Vegetable Crops, Punjab Agricultural University, Ludhiana-141 004, IN
2 Indian Institute of Horticulture Research, Hessaraghatta, Bangalore-560089, Karnataka, IN
3 Farm Advisory Service Scheme, Amritsar-143001, Punjab, IN

Abstract

Evaluation of 35 genotypes of tomato for yield, quality and fruit characters under net-house revealed that PCV was higher than GCV for most traits. High heritability, with moderate to high GCV and genetic gain, was recorded for number of fruits per plant, yield per plant, fruit weight, number of fruit-clusters per plant, polar diameter and number of flower-clusters per plant indicating, that, these characters could be improved by simple selection. Total yield per plant had positive and highly significant correlation with number of fruit-clusters per plant, number of flowerclusters per plant and fruit weight. Number of locules per fruit showed positive and significant correlation with fruit weight and equatorial diameter but, significant negative correlation with polar diameter. Maximum direct contribution to total yield per plant was made by number of fruits per plant, followed by number of locules per fruit.

Keywords

Tomato, Heritability, PCV, GCV, Growth, Yield, Quality Traits.

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Kuldeep Singh ¹, A. S. Sidhu ², Ajay Kumar ³

Affiliations
1 Department of Vegetable Crops, Punjab Agricultural University, Ludhiana-141 004, IN
2 Indian Institute of Horticulture Research, Hessaraghatta, Bangalore-560089, IN
3 Farm Advisory Service Scheme, Amritsar-143001, IN

Abstract

An experiment was conducted with 14 parents and 40 F1s to study heterosis in brinjal. Crosses showing significant heterosis over the better parent were: HE12 X Aruna for first fruit set; BR-112 X Aruna for fruit length and diameter; Pant Samrat X Punjab Neelam for number of fruits per plant; H-7 X Aruna for fruit weight; H-9 X S-16 for total yield per plant; Negative heterosis were recorded in KT-4 X Aruna for borer and Pant in Rituraj X Punjab Neelam for nematode infestation.

Keywords

Brinjal, Heterosis, Yield, Better Parent.

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Bharat Bhushan ¹, A. S. Sidhu ¹, A. S. Dhatt ¹, Ajay Kumar ¹

Affiliations
1 Department of Vegetable Crops, Punjab Agricultural University, Ludhiana-141 004, IN

Abstract

The experimental material in brinjal (eggplant) comprised 19 parents (15 lines + 4 testers), 60 F₁ crosses and two standard checks (BH-1 and BH-2). This was grown in Randomized Block Design, with three replications. Lines vs. testers showed significance for all characters except plant height, plant spread, number of primary branches, dry matter, total sugars and total phenol. Analysis for parents vs. hybrids showed significance for all the characters except average fruit weight, number of fruits per plant, plant spread and number of primary branches. Analysis of Variance for combining ability revealed mean squares due to lines and testers were significant for all the characters except plant height, plant spread, number of primary branches, total sugars, total phenol and content of anthocyanins. The ratio of variance due to specific combining ability and general combining ability (σ²SCA: σ²GCA) was greater than unity, indicating non-additive genetic control for all traits except plant spread and total phenols. Among the females, Punjab Barsati, PBR-91-1, RCMBL-1-1, BSR-11; and among the males, BB-93-C and U-8-61-3 were best general combiners for yield and yield components. Punjab Barsati was the best combiner for days to 50% flowering, days to first fruit harvest, number of fruits per plant and number of primary branches. The cross JBR-3-16 × PB-64 manifested best SCA effects for days to 50% flowering; PBR-91-1JBSR-98-2 for average fruit weight; BSR-11 × PB-64 for fruit length; BSR-11× U-8-61-3 for fruit girth, and the cross HABL-1 × JBSR-98-2 for yield per plant and per hectare.

Keywords

Brinjal, General Combining Ability, Specific Combining Ability, Additive Gene Action, Crosses.

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