Genetic Mechanisms for Hybrid Breeding in Vegetable Crops

Singh, Hardev; Sekhon, Bhallan Singh; Kumar, Pardeep; Dhall, R. K.; Devi, Ruma; Dhillon, Tarsem Singh; Sharma, Suman; Khar, Anil; Yadav, Ramesh Kumar; Tomar, B S; Ntanasi, Theodora; Sabatino, Leo; Ntatsi, Georgia

doi:10.3390/plants12122294

Cited by 8 publications

(2 citation statements)

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“…(2018) . The findings of Singh et al (2023) indicate that the presence of favourable heterosis in hybrids may offer opportunities for the utilisation of genes that can facilitate the development of cultivars with superior yield potential.…”

Section: Discussionmentioning

confidence: 99%

Optimizing hybrid vigor: a comprehensive analysis of genetic distance and heterosis in eggplant landraces

Rajan,

Debnath,

Perveen

et al. 2023

Front. Plant Sci.

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IntroductionThis study explored the molecular characterization of 14 eggplant (brinjal) genotypes to evaluate their genetic diversity and the impact of heterosis. As eggplant is a vital horticultural crop with substantial economic and nutritional value, a comprehensive understanding of its genetic makeup and heterosis effects is essential for effective breeding strategies. Our aim was not only to dissect the genetic diversity among these genotypes but also to determine how genetic distance impacts heterotic patterns, which could ultimately help improve hybrid breeding programs.MethodsGenetic diversity was assessed using 20 SSR markers, and the parental lines were grouped into five clusters based on the Unweighted Pair Group Method of Arithmetic Means (UPGMA). Heterosis was examined through yield and yield-related traits among parents and hybrids.ResultsPolymorphisms were detected in eight out of the twenty SSR markers across the parental lines. Notably, a high genetic distance was observed between some parents. The analysis of yield and yield-related traits demonstrated significant heterosis over mid, superior, and standard parents, particularly in fruit yield per plant. Two crosses (RKML-26 X PPC and RKML1 X PPC) displayed substantial heterosis over mid and better parents, respectively. However, the positive correlation between genetic distance and heterosis was only up to a certain threshold; moderate genetic distance often resulted in higher heterosis compared to very high genetic distance.DiscussionThese findings emphasize the critical role of parental selection in hybrid breeding programs. The results contribute to the understanding of the relationship between genetic distance and heterosis, and it is suggested that future research should delve into the genetic mechanisms that drive heterosis and the effect of genetic distance variance on heterosis. The insights drawn from this study can be harnessed to enhance crop yield and economic value in breeding programs.

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Section: Discussionmentioning

confidence: 99%

Optimizing hybrid vigor: a comprehensive analysis of genetic distance and heterosis in eggplant landraces

Rajan,

Debnath,

Perveen

et al. 2023

Front. Plant Sci.

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“…Breeding genetically distant morphotypes can result in a heterotic effect [36]. Heterosis plays a crucial role in breeding programs and leads to remarkable improvements in yield, quality, and earliness, which are considered the desirable outcomes when genetically distant parents are used to produce hybrid off-springs [37].…”

Section: Genetic Distancementioning

confidence: 99%

Assessing Genetic Variation among Strychnos spinosa Lam. Morphotypes Using Simple Sequence Repeat Markers

Mbhele,

Zharare,

Zimudzi

et al. 2023

Plants

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Strychnos spinosa Lam., commonly known as green monkey orange, is a highly valued indigenous fruit tree in South Africa with potential for domestication and commercialization. However, no study has reported on the molecular diversity of Strychnos spinosa morphotypes. Therefore, this study aimed to determine genetic variation among 32 Strychnos spinosa morphotypes using simple sequence repeat (SSR) markers. Fourteen amplified SSR markers produced 159 alleles, with a mean of 5.68 per locus. The polymorphic information content (PIC) values ranged from 0.22 (Ssp_1) to 0.84 (Ssp_6). Morphotypes were clustered in a biplot based on their genetic distances. The dendrogram chiefly discriminated morphotypes according to variation of pericarp texture. The population structure had the highest delta value K = 3, thus the 32 morphotypes were divided into three subpopulations based on the Bayesian approach. The affinities produced by the population structure agreed with the genetic distance of closely related morphotypes. This study is the first to report on SSR marker development and their successful use for genetic diversity and population structure studies of Strychnos spinosa. It provides insights into the molecular characterisation of Strychnos spinosa. This can lead to breeding programs and crop improvement programs, particularly in varietal developmental programs, which can contribute to alleviating food security challenges.

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