scholarly journals Detergent induced pollen sterility in some vegetable crops

2005 ◽  
Vol 11 (1) ◽  
Author(s):  
S. V. S. Chauhan ◽  
D. K. Agnihotri
Keyword(s):  
Lycopersicon Esculentum ◽  
Aqueous Solutions ◽  
Male Sterility ◽  
Seed Production ◽  
Synthetic Detergent ◽  
Pollen Sterility ◽  
Hybrid Seed ◽  
Hybrid Seed Production ◽  
Vegetable Crops ◽  
Number Of Seeds

Efficacy of a popular synthetic detergent, Surf excel in some important vegetable crops viz. Okra or lady finger (Abelmoschus esculentus L.), chilli or red pepper (Capsicum annuum L.) and tomato (Lycopersicon esculentum Mill) was evaluated for inducing male sterility and hybrid seed production. Foliar sprays with aqueous solutions of Surf excel (1.0 and 1.5% w/v) in these crops induced complete pollen sterility. The treated plants showed a delay in flowering, a reduction in the number of flowers and fruits/plant, number of seeds/fruit resulting in a reduction in yield/plant. However, the male sterility thus induced was successfully exploited for hybrid seed production.

scholarly journals Molecular basis underlying male sterility in bHLH142 overexpressing rice

2017 ◽  
Author(s):  
Swee-Suak Ko ◽  
Min-Jeng Li ◽  
Yi-Jyun Lin ◽  
Hong-Xian Hsing ◽  
Ting-Ting Yang ◽  
...  
Keyword(s):  
Male Sterility ◽  
Seed Production ◽  
Pollen Development ◽  
Early Stage ◽  
Pollen Sterility ◽  
Hybrid Seed ◽  
New Method ◽  
Hybrid Seed Production ◽  
Ros Scavenging ◽  
Early Expression

AbstractDevelopment of stable male sterility lines is essential for efficient hybrid seed production. We previously showed that knockout of bHLH142 in rice (Oryza sativa) causes pollen sterility by interrupting tapetal programmed cell death (PCD). In this study, we demonstrated that overexpression of bHLH142 (OE142) under the control of ubiquitin promoter also leads to male sterility in rice by triggering the premature onset of PCD. Protein of bHLH142 was found to accumulate specifically in the OE142 anthers. Overexpression of bHLH142 induced early expression of several key regulatory transcription factors in pollen development. In particular, the upregulation of EAT1 at the early stage of pollen development promoted premature PCD in the OE142 anthers, while its downregulation at the late stage impaired pollen development by suppressing genes involved in pollen wall biosynthesis, ROS scavenging and PCD. Collectively, these events led to male sterility in OE142. Analyses of related mutants further revealed the hierarchy of these pollen development regulatory genes. Thus, the findings of this study create a new method to generate genic male sterility in rice. Exploitation of this novel functionality of bHLH142 would confer a big advantage to hybrid seed production.HighlightOverexpression of bHLH142 leads to male sterility in transgenic rice due to early onset of tapetal PCD. This study creates a new method to generate male sterility in rice.

scholarly journals Male Sterility and its Commercial Exploitation in Hybrid Seed Production of Vegetable Crops: A Review

2019 ◽  
Vol 40 (04) ◽  
Author(s):  
Pramod Sharma ◽  
Sunil A Nair ◽  
Payal Sharma
Keyword(s):  
Male Sterility ◽  
Seed Production ◽  
Large Scale ◽  
Pollen Grains ◽  
Hybrid Seed ◽  
Scale Production ◽  
Hybrid Seed Production ◽  
Vegetable Crops ◽  
Male Sterile ◽  
Large Scale Production

Male sterility is described as absence of functional pollen grains in hermaphrodite flowers facilitating large scale production of hybrid seeds in vegetable crops. It eases hybrid seed production at commercial level in crops like tomato, chilli, capsicum, carrot, onion, cabbage, cauliflower and cucurbits. Male sterility would reduce the cost of hybrid seed production by limiting the labour making it efficient and economical. Incorporation of biotechnological tools in conventional plant breeding techniques would aid the breeders in limiting the drawbacks surrounding exploitation of male sterility for development of new hybrids. The present review is an attempt to summarize and to know the commercial utilization of male sterile line in hybrid seed production of vegetables.

scholarly journals Molecular regulation ofZmMs7required for maize male fertility and development of a dominant male-sterility system in multiple species

2020 ◽  
Vol 117 (38) ◽  
pp. 23499-23509 ◽  
Author(s):  
Xueli An ◽  
Biao Ma ◽  
Meijuan Duan ◽  
Zhenying Dong ◽  
Ruogu Liu ◽  
...  
Keyword(s):  
Male Sterility ◽  
Seed Production ◽  
Target Genes ◽  
Hybrid Seed ◽  
Molecular Regulation ◽  
Dominant Male ◽  
Hybrid Seed Production ◽  
Maize Breeding ◽  
Pollen Exine ◽  
Multiple Species

Understanding the molecular basis of male sterility and developing practical male-sterility systems are essential for heterosis utilization and commercial hybrid seed production in crops. Here, we report molecular regulation by genic male-sterility genemaize male sterility 7(ZmMs7) and its application for developing a dominant male-sterility system in multiple species.ZmMs7is specifically expressed in maize anthers, encodes a plant homeodomain (PHD) finger protein that functions as a transcriptional activator, and plays a key role in tapetal development and pollen exine formation. ZmMs7 can interact with maize nuclear factor Y (NF-Y) subunits to form ZmMs7-NF-YA6-YB2-YC9/12/15 protein complexes that activate target genes by directly binding to CCAAT box in their promoter regions. Premature expression ofZmMs7in maize by an anther-specific promoterp5126results in dominant and complete male sterility but normal vegetative growth and female fertility. Early expression ofZmMs7downstream genes induced by prematurely expressed ZmMs7 leads to abnormal tapetal development and pollen exine formation inp5126-ZmMs7maize lines. Thep5126-ZmMs7transgenic rice andArabidopsisplants display similar dominant male sterility. Meanwhile, themCherrygene coupled withp5126-ZmMs7facilitates the sorting of dominant sterility seeds based on fluorescent selection. In addition, both thems7-6007recessive male-sterility line andp5126-ZmMs7Mdominant male-sterility line are highly stable under different genetic germplasms and thus applicable for hybrid maize breeding. Together, our work provides insight into the mechanisms of anther and pollen development and a promising technology for hybrid seed production in crops.

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