Nagai and Kida  were the first to observe hybrid vigor in eggplant. The commercial exploitation of heterosis in eggplant is possible due to. Ten genetically diverse parental lines, their 45 hybrids of brinjal obtained Keywords: Dialle cross, brinjal, fruit yield, quality traits, heterosis. through heterosis breeding which is feasible in this crop (kakizaki, ) . Hence reports are available on hybrid vigor in brinjal. Pal and.
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Expression of heterosis for productive traits in F1 eggplant Solanum melongena L. Send correspondence to J.
study of heterosis in brinjal (Solanum melongena L.) 
The F1 hybrids used were: A randomized complete block design with three replications was used. Significant heterosis relative to the parental means was detected for all traits studied. The eggplant Solanum melongena L. The high degree of heterosis in eggplants has been reported in several studies, in the Brazilian and world-wide literature Monteiro, ; Noda, ; Dixit et al. Most authors recommend the commercial use of eggplant hybrids because of heterosis for fruit yield traits Monteiro, Table I – Description of the eggplant parentals.
Seeds from three of the 20 experimental hybrids obtained did not germinate. The seven cultivars, two lines, 18 F1 hybrids and two commercial hybrids were tested in a randomized complete block design with three replications at the experimental field of the ESAL campus, Lavras, MG, from February to October Each experimental plot consisted of 10 plants and was spaced at 1. Growing conditions were maintained similar to those normally used for a commercial eggplant crop.
Heterosis for different quantitative traits in brinjal (Solanum melongena L
Fourteen harvests were carried out, at brinjla day intervals, during a three and a half month period. The fruits classified as first class corresponded to the official commercial classification, classes Extra AA and Extra A. All hybrids showed positive heterosis and heterobeltiosis for total yield Table II. The hybrids displaying high heterosis also had high heterobeltiosis Table II. Pal and SinghOdland and NollIkuta and Monteiro also found significant heterosis results for this trait.
The heterosis magnitude indicates that the use of F1 hybrid plants improves this characteristic. The values obtained for the yield characteristics in the hybrids depended on the parents involved in the crosses, but all the yield characteristics had some type of genetic gain in the hybrids, compared to the parents.
The heterosis and heterobeltiosis for hybrid early heteorsis were also positive Table II. Cultivars Embu and B were parentals in those hybrids. The magnitude of the heterosis depended on the genotypes used.
The use of F1 hybrids in eggplants provided a quick and practical way of obtaining greater early yields. Under Brazilian conditions, early yield is not a limiting trait. However, it may be useful in the Southern region when planting is carried out soon after winter. In the temperate regions, the best prices are normally paid at the beginning of the production season, which makes early cultivars more valuable.
study of heterosis in brinjal (Solanum melongena L.)
On the other hand, the Santa Genebra x Melitino hybrid displayed a negative heterobeltiosis value. All the other hybrids showed positive values. The large magnitudes for this trait showed, in general, the great superiority of bbrinjal F1 hybrids, compared to the open pollinated cultivars, for obtaining good quality fruit.
Monteiro and Noda also reached this conclusion. First class fruit yield is a production characteristic which allows phenotypic selection of superior genotypes, in a screening process. However, since it does not take into account the yield of slightly inferior but still commercially viable fruits, this criterium cannot be used as the only selection method. Fruit characteristics are very important in eggplant breeding, as quality in vegetables is as much or more important than quantity Paterniani, The assessment criteria for quality values are more efficient than those which merely quantify production Noda, The commercial valorization of a crop, in terms of product quality, is dependent on its capacity to concentrate the heetrosis number of fruit within the market standards.
Positive heterosis for weight of early fruit was detected for the majority of hybrids, with highest positive scores for hybrids Embu x Melitino, Embu x Florida Market 10 and Embu x Black Beauty. On the other hand, the heyerosis values were mostly negative, though the hybrid Embu x Melitino was positive and outstanding Table III. Following the same tendency of the early assessment, the mean fruit weight had positive heterosis for the majority of the hybrids.
Heterobeltiosis values were mostly negative. The mean fruit weight, independent of the heterosis and heterobeltiosis values found, showed small difference from the established standard in the market commercial F hybrid. For abbreviations see Table II. When the yield characteristics are used as assessment criteria, it is desirable that the heterosis and heterobeltiosis levels, shown in the hybrid combinations, be as high as possible.
In view of the high heterosis and or heterobeltiosis values shown for the different characteristics, heterossis importance of the non-additive genetic effects in their expression can be inferred. Thus, it is presumed that the establishment of a population with a wide genetic base, using recurrent selection methods for increasing combining ability along with reciprocal recurrent selection, will lead to future new lines which result in hybrids superior to those studied.
Heterosis breeding in brinjal. Heterosis and combining ability in eggplant. Hybrid vigour and combining ability in eggplants.
Studies in hybrid vigour. II – Notes on the brinjal and bitter gourd. Estudos Recentes sobre Heterose. Heterosis and genetic architecture of leaf and yield characters in eggplant. All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License. Services on Demand Hetersis.
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How to cite this article. Average plant height cm.
First class fruit yield. Average early fruit weight.