Frequency and fertility restoration efficiency of Rf3 and Rf4 genes in Indian rice          下载免费PDF全文

Jawahar Lal Katara  Ram Lakhan Verma  Debkanta Nayak  Umakanta Ngangkham  Soham Ray  Hatanath Subudhi  Lambodar Behera  Sanghamitra Samantaray  Ravi Nageswara Rao  Onkar Nath Singh  Trilochan Mohapatra 《Plant Breeding》2017,136(1):74-82

Identification of new parental lines is crucial for developing ecology‐specific hybrids with ideal agronomic performance. We screened a total of 570 different ecology‐specific Indian rice varieties for the presence of fertility restorer genes, Rf3 and Rf4 using tightly linked markers DRRM Rf3‐10 and RM6100, respectively. Among these varieties, 13% carried Rf3Rf3/Rf4Rf4, 31% carried rf3rf3/rf4rf4, 6% carried Rf3Rf3/rf4rf4 and remaining 50% carried Rf4Rf4/rf3rf3 allelic combinations. A mini set of 40 varieties with variable allelic combinations of fertility restorer genes were testcrossed with WA and Kalinga‐based CMS lines. All the 80 F₁s were evaluated for spikelet fertility and fertility restoration ability. Rf3Rf3/rf4rf4 genotypes mostly behaved as partial maintainers or partial restorers. In contrast, rf3rf3/Rf4Rf4 genotypes were partial or effective restorers. However, double dominant genotypes showed better fertility restoration than the genotypes containing Rf3 or Rf4 individually. Some of the genotypes showed unexpected restoration pattern implying occurrence of other fertility restorer(s) apart from Rf3 and Rf4. The perfect restorers and maintainers identified in this study can be directly used in hybrid rice breeding.  相似文献   

Effects of high temperature on spikelet sterility in rice (Oryza sativa L.): association between molecular markers and allelic phenotypic effect in field condition     

Chidambaranathan  Parameswaran  Balasubramaniasai  Cayalvizhi  Behura  Niranjana  Purty  Mohini  Samantaray  Sanghamitra  Subudhi  Hatanath  Ngangkham  Umakanta  Devanna  B. N.  Katara  Jawahar Lal  Kumar  Awadhesh  Behera  Lambodar 《Genetic Resources and Crop Evolution》2021,68(5):1923-1935

Genetic Resources and Crop Evolution - Rice varieties are generally bred for higher yield but may possess genomic regions conferring tolerance to abiotic stresses. Climate change driven heat stress...  相似文献