Genetic diversity and QTL-marker association analysis of rice germplasm for grain number per panicle and its contributing traits
Rice is one of the leading cereal crops that consumed over half of the world’s population. The number of grains per panicle is the main trait to decide grain yield potential of rice. Rice germplasm have rich diversity for panicle related trait. Hence, a study was undertaken to screen 77 diverse ri...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Indian Society of Plant Breeders
2022-06-01
|
| Series: | Electronic Journal of Plant Breeding |
| Subjects: | |
| Online Access: | https://www.ejplantbreeding.org/index.php/EJPB/article/view/4315 |
| _version_ | 1827972946233131008 |
|---|---|
| author | M. Arunkumar1, S. Geetha2*, K. Amudha3, R. Suresh4, V. Ravichandran5 and K. Geetha6 |
| author_facet | M. Arunkumar1, S. Geetha2*, K. Amudha3, R. Suresh4, V. Ravichandran5 and K. Geetha6 |
| author_sort | M. Arunkumar1, S. Geetha2*, K. Amudha3, R. Suresh4, V. Ravichandran5 and K. Geetha6 |
| collection | DOAJ |
| description | Rice is one of the leading cereal crops that consumed over half of the world’s population. The number of grains
per panicle is the main trait to decide grain yield potential of rice. Rice germplasm have rich diversity for panicle
related trait. Hence, a study was undertaken to screen 77 diverse rice germplasm for grain number per panicle and
its contributing traits. Mahalanobis’ D2 analysis was performed to study genetic diversity among the germplasm. Eight
clusters were formed and cluster IV was found to be the largest cluster with 37 genotypes. Cluster V had 20 genotypes
with the highest cluster mean value of 298 for the number of grains per panicle. Grain yield per plant and the number of
spikelets per panicle were found to be the biggest contributor for total divergence. QTL linked markers were screened
in diverse rice germplasm. Among the six QTLs screened, five QTLs were significantly associated with grain number
per panicle and its relevant traits. For grain number per panicle the QTLs, Gn1a (0.1058), qGN 4.1 (0.117) and NGP 4
(0.062) recorded high R2 values. Among the markers, Gn1a indel 3 (GN1a), NKSSR 04-19 (q GN 4.1), RM 6314 (NGP
4) and RM1183 (NOG 1) were identified as the most informative markers for utilization in marker assisted breeding
programme. From this study, genotypes viz., Kallukar, CO52, IET 29504, IET 29506, RP-5594-97-5-1, MTU1360, ADT
54 possess high mean value for grain number per panicle and grain yield, linked with functional markers could be used
as a donor in marker assisted breeding programme. |
| first_indexed | 2024-04-09T19:28:58Z |
| format | Article |
| id | doaj.art-784c4e16101046939fd541500269a368 |
| institution | Directory Open Access Journal |
| issn | 0975-928X |
| language | English |
| last_indexed | 2024-04-09T19:28:58Z |
| publishDate | 2022-06-01 |
| publisher | Indian Society of Plant Breeders |
| record_format | Article |
| series | Electronic Journal of Plant Breeding |
| spelling | doaj.art-784c4e16101046939fd541500269a3682023-04-05T05:28:52ZengIndian Society of Plant BreedersElectronic Journal of Plant Breeding0975-928X2022-06-0113255856610.37992/2022.1302.068Genetic diversity and QTL-marker association analysis of rice germplasm for grain number per panicle and its contributing traitsM. Arunkumar1, S. Geetha2*, K. Amudha3, R. Suresh4, V. Ravichandran5 and K. Geetha601Department of Genetics and Plant Breeding, Tamil Nadu Agricultural University, Coimbatore 641003, India 2Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore 641003, India 3Department of Rice, Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore 641003, India 4 Tamil Nadu Rice Research Institute, Tamil Nadu Agricultural University, Aduthurai – 612 101, India 5 Department of Crop Physiology, Tamil Nadu Agricultural University, Coimbatore 641003, India 6 Regional Research Station, Tamil Nadu Agricultural University, Paiyur- 635 112, India *E-Mail : geethagovind1@gmail.comRice is one of the leading cereal crops that consumed over half of the world’s population. The number of grains per panicle is the main trait to decide grain yield potential of rice. Rice germplasm have rich diversity for panicle related trait. Hence, a study was undertaken to screen 77 diverse rice germplasm for grain number per panicle and its contributing traits. Mahalanobis’ D2 analysis was performed to study genetic diversity among the germplasm. Eight clusters were formed and cluster IV was found to be the largest cluster with 37 genotypes. Cluster V had 20 genotypes with the highest cluster mean value of 298 for the number of grains per panicle. Grain yield per plant and the number of spikelets per panicle were found to be the biggest contributor for total divergence. QTL linked markers were screened in diverse rice germplasm. Among the six QTLs screened, five QTLs were significantly associated with grain number per panicle and its relevant traits. For grain number per panicle the QTLs, Gn1a (0.1058), qGN 4.1 (0.117) and NGP 4 (0.062) recorded high R2 values. Among the markers, Gn1a indel 3 (GN1a), NKSSR 04-19 (q GN 4.1), RM 6314 (NGP 4) and RM1183 (NOG 1) were identified as the most informative markers for utilization in marker assisted breeding programme. From this study, genotypes viz., Kallukar, CO52, IET 29504, IET 29506, RP-5594-97-5-1, MTU1360, ADT 54 possess high mean value for grain number per panicle and grain yield, linked with functional markers could be used as a donor in marker assisted breeding programme.https://www.ejplantbreeding.org/index.php/EJPB/article/view/4315ricegrain numberqtlsdiversity analysisgrain yield |
| spellingShingle | M. Arunkumar1, S. Geetha2*, K. Amudha3, R. Suresh4, V. Ravichandran5 and K. Geetha6 Genetic diversity and QTL-marker association analysis of rice germplasm for grain number per panicle and its contributing traits Electronic Journal of Plant Breeding rice grain number qtls diversity analysis grain yield |
| title | Genetic diversity and QTL-marker association analysis of rice germplasm for grain number per panicle and its contributing traits |
| title_full | Genetic diversity and QTL-marker association analysis of rice germplasm for grain number per panicle and its contributing traits |
| title_fullStr | Genetic diversity and QTL-marker association analysis of rice germplasm for grain number per panicle and its contributing traits |
| title_full_unstemmed | Genetic diversity and QTL-marker association analysis of rice germplasm for grain number per panicle and its contributing traits |
| title_short | Genetic diversity and QTL-marker association analysis of rice germplasm for grain number per panicle and its contributing traits |
| title_sort | genetic diversity and qtl marker association analysis of rice germplasm for grain number per panicle and its contributing traits |
| topic | rice grain number qtls diversity analysis grain yield |
| url | https://www.ejplantbreeding.org/index.php/EJPB/article/view/4315 |
| work_keys_str_mv | AT marunkumar1sgeetha2kamudha3rsuresh4vravichandran5andkgeetha6 geneticdiversityandqtlmarkerassociationanalysisofricegermplasmforgrainnumberperpanicleanditscontributingtraits |