Strong culm: a crucial trait for developing next-generation climate-resilient rice lines

Guha, Pritam Kanti; Magar, Nakul D.; Kommana, Madhavilatha; Barbadikar, Kalyani M.; Suneel, B.; Gokulan, C.; Lakshmi, D. Vijay; Patel, Hitendra Kumar; Sonti, Ramesh V.; Sundaram, R. M.; Madhav, Maganti Sheshu

doi:10.1007/s12298-024-01445-6

Cited by 2 publications

References 99 publications

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Dissecting the Genetic Basis of Superior Traits in Thermosensitive Genic Male Sterile Line 1892S Through Genome-Wide Analysis

Zhang,

Zhang

2024

Preprint

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Hybrid rice has revolutionized food security by leveraging heterosis, a phenomenon where offspring outperform their parents. Sterile lines, crucial for controlled cross-pollination in hybrid breeding, have played a central role in this success. This study delves into the superior alleles of 1892S, a two-line sterile rice line widely used as a female parent in central China. By integrating extensive hybridization data, high-throughput genome sequencing, and bioinformatic analysis (RiceNavi), we elucidate the genetic underpinnings of 1892S's exceptional adaptability. The results reveal its remarkable compatibility as a female parent in over 114 hybrid varieties, potentially due to the influence of Japonica characteristics contributing to strong hybrid vigor. Furthermore, some favorable alleles were identified that were associated with lodging resistance, high yield potential, and improved nitrogen use efficiency etc. The comprehensive characterization of 1892S provides valuable insights for future hybrid rice breeding programs, ultimately facilitating the development of superior rice varieties.

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Dissecting the Genetic Basis of Superior Traits in Thermosensitive Genic Male Sterile Line 1892S Through Genome-Wide Analysis

Zhang,

Zhang

2024

Preprint

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Genetic Dissection of Major Rice QTLs for Strong Culms and Fine Mapping of qWS5 for Breeding Application in Transplanted System

Bian,

Cao,

Zou

et al. 2024

Rice

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Background Rice is one of the major staples that feeds about one half of the global populations, and it is important to identify the genetic loci for the traits related to yield improvement. Lodging will cause severe yield loss when it happens, and stem diameter has been characterized as an important trait for lodging resistance. However, most QTLs for stem diameter have not been finely dissected due to their sensitivity to environmental fluctuation. Result In this study, we performed QTL analysis for stem diameter using populations derived from Nipponbare (NIP) and strong culm variety YYP1, and confirmed the single and combined effect of three major QTLs by recombinant inbred lines (RILs). Based on the QTL location, we found that qWS5 is a novel QTL not well characterized before. To finely dissect the novel locus, several recombinant heterogeneous inbred families (HIFs) were selected from the RILs for linkage analysis and their derived nearly isogenic lines (NILs) were subjected to detailed trait investigation throughout different years. The HIF-NILs strategy confined the QTL to about 380 kb region supported by repeated genotype and phenotype data, and it lays the foundation for QTL cloning in the future. In addition, introgression of the QTL to an elite japonica variety SD785 was performed by successive backcrossing, and it confirmed the value of qWS5 in increasing stem diameter and other agronomic traits during rice breeding. Conclusions We prove that qWS5 is a novel QTL with relatively stable effect for stem diameter and the QTL can be finely mapped to small region by the HIF-NILs strategy. The result will facilitate the improvement of rice lodging resistance by molecular marker assisted selection breeding.

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Strong culm: a crucial trait for developing next-generation climate-resilient rice lines

Cited by 2 publications

References 99 publications

Dissecting the Genetic Basis of Superior Traits in Thermosensitive Genic Male Sterile Line 1892S Through Genome-Wide Analysis

Dissecting the Genetic Basis of Superior Traits in Thermosensitive Genic Male Sterile Line 1892S Through Genome-Wide Analysis

Genetic Dissection of Major Rice QTLs for Strong Culms and Fine Mapping of qWS5 for Breeding Application in Transplanted System

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