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The current method of doubled haploid (DH) development in maize involves in vivo production of haploids using R1-njbased haploid inducer lines that upon use as male render a small fraction of seed in the pollinated female ears haploid. Identification of haploid seed relies on R1-nj marker expression in the endosperm and embryo, and the degree of its expression determines efficiency of DH development process. In the present study, R1-nj expression in the endosperm was characterized in crosses of CIMMYT’s R1-nj-based haploid inducer TAILP1 with a set comprising 18 early maturity hybrids and their 23 parental inbreds. Kernel colour inhibition was observed only in a small proportion of the hybrids and inbreds. Comparison of R1-nj expression in the hybrids and their parental inbreds revealed a distinct pattern, which may be useful in identifying source populations and/or determining parental constituents for synthesizing source populations with predicted amenability to doubled haploid development using R1-nj-based haploid inducers. However, deviation from the pattern was noted in hybrids involving inbreds with higher degree of colour inhibition, which suggests complex nature of R1-nj phenotype expression and necessitates further investigation involving larger sets of germplasm for dissecting the role of maternal and paternal genetic factors in determining R1-nj phenotype expression. The hybrids found exhibiting complete kernel anthocyanin expression in present study can be used directly as source populations for DH development using R1-nj based haploid inducers. Besides, since the inbreds used in the study have originated from and/or are accessible to CGIAR/NARS maize breeding programmes, the information on their kernel anthocyanin expression can be helpful in selection of source populations or generating new source populations amenable for DH development using R1-nj based haploid inducers.

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Block chain technology has become extremely popular in recent years, largely because of how safe and decentralized it is. Block chain technology has opened up new prospects in the financial sector with the rise of crypto currencies and non-fungible tokens (NFTs). However, it can be challenging for investors to understand and make wise investment decisions given the abundance of crypto currencies and NFTs available. We suggest an Internet Computer block chain-based crypto currency recommendation and NFT exchange platform that makes use of REST APIs in order to solve this problem. The platform makes use of machine learning algorithms to analyze user data, offer investments based on their goals for investing, risk tolerance, and other preferences. The site also functions as a marketplace where NFTs may be bought and sold. Users can trade NFTs without relying on centralized intermediaries thanks to the Internet Computer block chain's secure and decentralized ecosystem. While keeping ownership and control over their assets, users can securely swap NFTs and other digital assets. To provide a user-friendly interface for accessing investment suggestions and NFT trading functions, the platform makes use of REST APIs. Because of the REST APIs, a larger audience can engage with the platform in a standardized and scalable manner. We make use of the special characteristics of the Internet Computer block chain, such as smart contracts and canisters, to guarantee the security and dependability of the platform. On the Internet Computer block chain, code is executed and data is managed by canisters, which are scalable and secure computing units. In conclusion, our Internet Computer block chain-based crypto currency recommendation and NFT exchange platform, which uses REST APIs, provides a safe and scalable option for investors looking to trade NFTs and make informed investment decisions. Users benefit from a personalized and secure investing experience thanks to the platform's usage of machine learning algorithms and the distinctive characteristics of the Internet Computer block chain Key Word: Block chain technology, Crypto currencies, Non-fungible tokens (NFTs), REST APIs, Internet Computer block chain, Investment recommendations.

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