Heterosis in okra pdf
Heterosis (or hybrid vigour) is a major reason for the success of the maize industry as well as for recent advances in yield potential in rice. In cotton production systems, advantages and disadvantages have been documented for sub-okra, okra, and super-okra versus normal leaf cotton. However, despite high heterotic values, it is very difficult to produce hybrid okra. Hybrid okra seeds have heterosis values that can rapidly increase productivity, improve the quality of okra as a food, and so on . Table 1: Estimates of heterosis and inbreeding depression for growth, yield and yield contributing traits in four crosses of okra. Heterosis in okra hybrids obtained by hybridization of two methods: traditional and experimental.
INNSPUB is dedicated to publish scholarly research journals and books in English and believes in sharing of new scientific knowledge in the field of Natural sciences, Biology, Medicine and Agriculture all over the world. Bikaneri Nerma x Arizona Super Okra leaf green (T 3 x L 12) showed economic heterosis, significant SCA and involved one good genral combiner parent under irrigated, high fertility for total seed cotton yield/plant. Heterosis or hybrid vigour has been exploited in its full potential in several vegetables of these two vegetable families. Interspecific hybrids may surpass traditional varieties in taste, shelf-life, size, texture, nutrition, etc.
The present study was undertaken to identify potential parents and superior cross combinations for yield and yield attributes. through heterosis breeding, which is practical in this crop (Vijayraghvan and Warier, 1946). Combining Ability and Heterosis for Yield and its contributing characters in Okra (Abelmoschus esculantus (L.) Moench). Exploitation of heterosis is primarily dependent on the screening and selection of available germplasm that could be produced by better combinations of important agronomic characters. Also the crosses were evaluated at the farmer’s field on the basis of questionnaire developed. The seed production of varieties and hybrids of vegetables should be carried out carefully in the region where these are well adopted. Seed harvesting, processing and storage Plant Breeding and Genetics Mendelian inheritance.
Eight parental lines of okra and their 28 F1 hybrids obtained from half diallel were studied to investigate the extent of heterosis for yield and yield attributing characters. 45 F1s were developed by crossing 10 elite lines of okra in half diallel fashion during summer 2016. Okra, lady’s finger (Abelmoschus esculentus (L.) Moench), is a tall, upright, fast growing, annual herb propagated by seed. Emasculation and pollination processes are easier due to large flower and monoadelphous stamens. The results revealed that the standard heterosis for fruit yield per plant was maximum in the hybrid MDU 1 xHissar Unnath, with a value of 65.23 per cent. Key words : Heterosis, Heterobeltiosis, Line x tester mating design, Okra How to cite this paper : Javia, R.M.
The magnitude of heterosis varied from cross to cross for all the characters studied. The breeding methods in such species aim at improving the crop species without reducing heterozygosity to an appreciable degree.
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In heterosis breeding, prediction about increased hybrid vigour for a specific trait fully depends on the choice of parents and to what extent the parents are diverse from each other. This item appears in the following Collection(s) Faculty of Agriculture  Search Research Gateway. The occurrence of heterosis is common in plant species, but its level of expression is highly variable. improvement of major horticultural crops, hybridization, heterosis and its exploitation, male sterility and self incompatibility and polyploidy.
The work included collection and evaluation of okra germplasm, identification of parents for hybridization, selfing of identified parental lines, making crosses and production of hybrid seeds, testing of hybrids for yield and resistance to Yellow Vein Mosaic Virus (YVMV) disease, adaptability under diverse agro-climatic condition and testing in all India trials. INTRODUCTION HETEROSIS The superiority of F1 hybrid over both its parents in terms of yield or some other characters or heterosis is increased vigours, growth, yield or function of a hybrid over the parents, resulting from crossing of genetically unlike plants. The term heterosis was coined by Shull (1914)  which refers to a superiority or inferiority of F 1 hybrids in one or more characters over its parents. Thirty six hybrids along with twelve okra parental lines and three testers were evaluated for heterosis and inbreeding depression. Okra is being an often cross-pollinated crop, responds well to heterosis breeding. Heterosis studies in okra In the present experiment, a study was conducted during kharief 2012 at three locations. The application of heterosis is considered to an outstanding application of principles of genetics to agriculture.
The values for standard heterosis for fruits per plant ranged from -27.16 to 20.69 per cent and three crosses exhibited positive standard heterosis. parents is essential to realize heterosis and to obtain transgressive segregates.
Trends in Biosciences, 8(12): 3252 – 3255.
Studies on Heterosis and genetic analysis for some quantitative and quality traits in tomato . The journal publishes original full-length research papers in all areas related to plant biology. Existence of a large number of related species with wide variability and dominant characters suggest possible role of India as a secondary centre of origin. The present investigation “Studies on genetic variability, heritability and genetic advance in okra [ Abelmoschus esculentus (L.) Moench]” was carried out during kharif season of 2012-2013 at the Vegetable Research Farm, Department of Horticulture, College of Agriculture, J.N.K.V.V., Jabalpur (M.P.). Heterosis breeding for the development of hybrid cultivar mainly utilizes dominance variance in both self and cross pollinated vegetable crops. Keywords: Heterosis, heterobeltiosis, standard heterosis, fruit yield, okra Introduction like carbohydrates, minerals, vitamins, proteins and dietary fibers.
Two Egyptian and four exotic parental genotypes of okra were self pollinated for one generation and crossed in half diallel design to study heterosis and combining ability for earliness, vegetative and yield components traits. Impact of Seed Treatment of Plant Growth Regulators on Seed Germination and Growth of Okra (Abelmoschus Esculentus (L.) Moench) cv. Okra is a seed propagated hot weather crop sensitive to frost, low temperature, and waterlogging as well as drought conditions. Therefore, the prevalence of genetic variation among the genotypes is a pre-requisite for the selection of the parents (Gupta et al., 2018). The results revealed that the most outstanding for fresh pod yield per plant were okra cultivar Kwadag Y’ar gagure Salkade, and Kwadam, in descending order, with yield ranging from 580.38 to 622.67 g, while the Composite cultivar had the lowest value of pod yield of 428.62 g over the two years. variability of the different varieties of okra by the combination and grouping of characters into genotypes of interest could contribute to the varietal improvement of this species (Lukonge, 2005). Similarly, the heterosis effect appeared in F1 in these hybrids with UAE22 as a mother form keeps up to the third generation. Breeding for resistance against blackrot, stalk rot and heterosis studies in late cauliflower .
American–Eurasian Journal of Agriculture and Environmental Sciences, 13(2), 162–167. heterosis in okra pdf It is very important to our program that we s3666 the needs of the agencies that require our accreditation. A study was conducted in okra to estimate the magnitude of heterosis and to identify the good combiners for yield and quality parameters. The study reveals good scope for exploitation of heterosis in okra for high yield. Hence, identification of suitable donor parent among cultivated species of okra is a prerequisite for the development of tolerant recombinant line(s) to ELCV disease. It is developed through geneic male sterile line Early flowering and first female flower appears at 9 th node from the base of the vine.
In our study, 24 hybrids obtained by diallel cross between ecotypes of okra were subjected to analysis of their combining ability effects and hybrid vigor for. The objective of this study was to evaluate the performance of okra hybrids derived from the reciprocal crosses of two inbred breeding lines, IK7 (medium maturing) and Iwo Nla (early maturing) under rainfed conditions. Heterosis for fruit yield and its component traits in double cross derived inbred lines of okra [Abelmoschus esculentus (L.) Moench] Published on Jun 25, 2018 10:14 AM. Moreover, F 1 generation combined the characters of Clemson Spineless and Dwarf long green varieties and also had additional improved genetic attributes.
For plant height cross Results and discussion The exploitation of heterosis in crop plant is regarded as one of the major breakthrough in the field of plant breeding. pdf economic impact of macro and micro-nutrients management on okra production m.d. In contrast, this technology has not been effectively deployed in West African Okra. Abstract: Combining ability was estimated for six diverse okra genotypes or varieties by diallel analysis. Line X Tester Analysis for Heterosis in Okra [ Abelmoschus esculentus (L.) Moench] Thirteen genetically diverse parents collected from the different parts of the country and their 36 crosses generated by using line x tester mating design, was undertaken to study the heterosis and heterobeltiosis for fruits yield and its contributing characters in okra. The study of heterosis would help in selection of heterotic crosses for commercial exploitation of F1 hybrids in okra (Abelmoschus esculentus (L.) Moench).