High Pollen Sterility and 2&lt;i&gt;n&lt;/i&gt; Pollen Grains in an Asynaptic 4&lt;i&gt;x&lt;/i&gt; Cytotype (2&lt;i&gt;n&lt;/i&gt;=48) of &lt;i&gt;Solanum nigrum&lt;/i&gt; L.

Singhal, Vijay Kumar; Kaur, Maninder; Kumar, Himshikha Puneet; Gupta, Raghbir Chand

doi:10.1508/cytologia.77.333

Cited by 14 publications

(3 citation statements)

References 47 publications

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“…The asynaptic nature of line Vf6 could be the cause for the large fraction of non-viable pollen. Several studies with asynaptics lines of V. faba [ 41 ] and Solanum nigrum [ 42 ] revealed a higher amount of non-viable pollen.…”

Section: Discussionmentioning

confidence: 99%

Study and QTL mapping of reproductive and morphological traits implicated in the autofertility of faba bean

et al. 2022

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Autofertility describes the ability of faba bean flowers to self-fertilize thereby ensuring the productivity of this crop in the absence of pollinators or mechanical disturbance. In the legume crop faba bean (Vicia faba L.), lack of autofertility in a context of insufficient pollination can lead to a severe decrease in grain yield. Here we performed the first QTL analysis aimed at identifying the genomic regions controlling autofertility in this crop. We combined pod and seed setting scores from a recombinant inbred population (RIL) segregating for autofertility in different environments and years with measurements of morphological floral traits and pollen production and viability. This approach revealed 19 QTLs co-localizing in six genomic regions. Extensive co-localization was evident for various floral features whose QTLs clustered in chrs. I, II and V, while other QTLs in chrs. III, IV and VI revealed co-localization of flower characteristics and pod and seed set data. The percentage of phenotypic variation explained by the QTLs ranged from 8.9 for style length to 25.7 for stigma angle. In the three QTLs explaining the highest phenotypic variation (R2 > 20), the marker alleles derived from the autofertile line Vf27. We further inspected positional candidates identified by these QTLs which represent a valuable resource for further validation. Our results advance the understanding of autofertility in faba bean and will aid the identification of responsible genes for genomic-assisted breeding in this crop.

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Section: Discussionmentioning

confidence: 99%

Study and QTL mapping of reproductive and morphological traits implicated in the autofertility of faba bean

et al. 2022

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“…However, in reality, the germination rate of Solanum nigrum seeds tends to be relatively low. 10 Previous studies have investigated the impact of factors such as genetics, signalling molecules, and pistil physiology on seed germination. However, it remains unclear whether the process of pollen tube fertilisation affects the germination rate.…”

Section: Introductionmentioning

confidence: 99%

“…In theory, all ovules of Solanum nigrum should be fertilised, yielding fertile seeds. However, in reality, the germination rate of Solanum nigrum seeds tends to be relatively low 10 …”

Section: Introductionmentioning

confidence: 99%

The fertility tracks of pollen tube in the ovary of Solanum nigrum by three‐dimensional reconstruction

Ming,

Chen,

et al. 2023

Journal of Microscopy

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In this paper, we present an enhanced method for automatically capturing a large number of consecutive paraffin sections using a microscope. Leveraging these microstructural images, we employed three‐dimensional visualisation and reconstruction techniques to investigate the dispersal growth process of pollen tube bundles upon entering the ovary of Solanum nigrum. Additionally, we explored their behaviour within different ovules and examined the relationship between the germination rate of seeds and the fertilisation process. Our findings reveal that despite the abundance of Solanum nigrum seeds, only a fraction of them is capable of successful germination. The germination rate of seeds is closely related to whether fertilisation of the ovules and pollen tubes is completed. Due to the limited number of pollen tubes entering the ovary, only a portion of the ovules can be fertilised. The proportion of fertilised ovules positively correlates with the germination rate of the seeds. Through three‐dimensional reconstruction, we observed a phenomenon of proximity during the pollination process, wherein ovules closer to the pollen tube bundles are more likely to be fertilised. Furthermore, fertilised ovules exhibited significant changes in morphology and embryo sac structure. The number of fertilised ovules directly impacts the germination rate of wild Solanum nigrum seeds. Although all Solanum nigrum ovules have the potential to develop into seeds, most seeds originating from unfertilised ovules are unable to germinate normally, resulting in an incomplete germination rate of seeds and preventing it from reaching 100%.

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Heteroploidy in Brassica juncea: Basics and Applications

Gupta

Banga

2022

The Brassica Juncea Genome

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High Pollen Sterility and 2<i>n</i> Pollen Grains in an Asynaptic 4<i>x</i> Cytotype (2<i>n</i>=48) of <i>Solanum nigrum</i> L.

Cited by 14 publications

References 47 publications

Study and QTL mapping of reproductive and morphological traits implicated in the autofertility of faba bean

Study and QTL mapping of reproductive and morphological traits implicated in the autofertility of faba bean

The fertility tracks of pollen tube in the ovary of Solanum nigrum by three‐dimensional reconstruction

Heteroploidy in Brassica juncea: Basics and Applications

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