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Estimation and Association of Genetic Diversity and Heterosis in Basmati Rice
Pradhan, Sharat Kumar,Singh, Sanjay,Bose, Lotan Kumar,Chandra, Ramesh,Singh, Omkar Nath The Korean Society of Crop Science 2007 Journal of crop science and biotechnology Vol.10 No.2
A representative group of 38 improved basmati lines including maintainers of sterile lines were studied for genetic diversity utilizing Mahalanobis $D^2$ statistics. A wide diversity was observed having ten clusters with high intra- and inter-cluster distance. Heterosis was estimated utilizing the cytoplasmic male sterile lines from the clusters having high intra- and inter-cluster distance. Highly heterotic hybrids were obtained from the hybridization programme. Cross combinations IR68281A/Pusa 1235-95-73-1-1, IR68281A/RP 3644-41-9-5, Pusa 3A/UPR 2268-4-1, IR 68281A/Pusa Basmati-1, IR68281A/BTCE 10-98, and IR58025A/HKR 97-401 were found to be highly heterotic for grain yield/plant with other agronomic and quality traits. Additionally, a positive association of intra-cluster distance with heterosis was observed, which could be utilized as a guideline for predicting heterosis in basmati hybrid rice breeding program. Also, a positive association between inter-cluster distance and heterosis was observed.
Estimation and Association of Genetic Diversity and Heterosis in Basmati Rice
Sharat Kumar Pradhan,Sanjay Singh,Lotan Kumar Bose,Ramesh Chandra,Omkar Nath Singh 한국작물학회 2007 Journal of crop science and biotechnology Vol.10 No.2
A representative group of 38 improved basmati lines including maintainers of sterile lines were studied for genetic diversity utilizing Mahalanobis D2 statistics. A wide diversity was observed having ten clusters with high intra- and inter-cluster distance. Heterosis was estimated utilizing the cytoplasmic male sterile lines from the clusters having high intra- and inter-cluster distance. Highly heterotic hybrids were obtained from the hybridization programme. Cross combinations IR68281A/Pusa 1235-95-73-1-1, IR 68281A/RP 3644-41-9-5, Pusa 3A/UPR 2268-4-1, IR 68281A/Pusa Basmati-1, IR68281A/BTCE 10-98, and IR58025A/HKR 97- 401 were found to be highly heterotic for grain yield/plant with other agronomic and quality traits. Additionally, a positive association of intra-cluster distance with heterosis was observed, which could be utilized as a guideline for predicting heterosis in basmati hybrid rice breeding program. Also, a positive association between inter-cluster distance and heterosis was observed. A representative group of 38 improved basmati lines including maintainers of sterile lines were studied for genetic diversity utilizing Mahalanobis D2 statistics. A wide diversity was observed having ten clusters with high intra- and inter-cluster distance. Heterosis was estimated utilizing the cytoplasmic male sterile lines from the clusters having high intra- and inter-cluster distance. Highly heterotic hybrids were obtained from the hybridization programme. Cross combinations IR68281A/Pusa 1235-95-73-1-1, IR 68281A/RP 3644-41-9-5, Pusa 3A/UPR 2268-4-1, IR 68281A/Pusa Basmati-1, IR68281A/BTCE 10-98, and IR58025A/HKR 97- 401 were found to be highly heterotic for grain yield/plant with other agronomic and quality traits. Additionally, a positive association of intra-cluster distance with heterosis was observed, which could be utilized as a guideline for predicting heterosis in basmati hybrid rice breeding program. Also, a positive association between inter-cluster distance and heterosis was observed.
Genetic Variability of Quality Characters and Grain Yield in Lowland Rice Genotypes of Eastern India
Lotan Kumar Bose,Sanjukta Das,Sarat Kumar Pradhan,HataNath Subudhi,Sanjay Singh,OnkarNath Singh 한국육종학회 2007 한국육종학회지 Vol.39 No.1
Twenty-five promising lowland rice genotypes of eastern India were studied for genetic variability in twelve quality characters and grain yield. Analysis of variance for all the characters indicated significant differences among genotypes for all the phys
Ashok Karuppannasamy,Bhargava Chikmagalur Nagaraja,Prasad Babu Karakatti,Rohan Wishard,Manamohan Malligopal,Rai Anil,Sanjay Kumar Pradhan,Parvathy Madhusoodanan Sujatha,Kennedy John Samuel,Asokan Rama 한국응용곤충학회 2023 Journal of Asia-Pacific Entomology Vol.26 No.1
Overuse of synthetic chemicals over a long period of time has not only resulted in control failures but also enormous ecological damage. This necessitates developing eco-friendly, effective alternatives for sustainable pest management. In this regard, potential of CRISPR/Cas9 mediated genome editing to introduce site specific mu tations that mostly resulting in loss of function has been successfully demonstrated in wide varieties of organisms including insects. This has opened a new avenue to design and implement futuristic pest management strategies like precision guided sterile insect technique (pgSIT) for an area wide suppression. This requires validation of target genes employing Ribonucleoprotein (RNP) complex containing sgRNA and Cas9 protein before under taking transgenesis for achieving pgSIT. In the present study, we have for the first time, supporting CRISPR/Cas9 mediated editing of the eye colour gene, Tryptophan 2, 3-dioxygenase of the eggplant shoot and fruit borer, Leucinodes orbonalis using RNP complex. The mutant moths of both sexes exhibited reddish brown eyed phenotype. Having established an RNP mediated editing system in L. orbonalis, the key genes involved in sex determination and spermatogenesis will be validated for developing a pgSIT system for L. orbonalis.