Phenotypic and molecular characterization of rice germplasm lines and identification of novel source for low soil phosphorus tolerance in rice
Mahadeva Swamy, H.K.
Phenotypic and molecular characterization of rice germplasm lines and identification of novel source for low soil phosphorus tolerance in rice - Netherlands : Springer Nature B.V., 2019.
Peer review
Phosphorus (P) is an essential macro-nutrient required for growth and development of all crop plants including rice. Low availability of P in the soils manifests in terms of impeding crop growth leading to yield losses in rice. Adequate genetic variability for low soil P tolerance and also P use efficiency has been documented in rice and a major QTL called Pup1, conferring tolerance to low soil P has been identified, characterized and cloned from an Indian landrace, Kasalath. In the present study, a set of 98 germplasm lines collected from North-Eastern part of India were characterized for low soil P tolerance by screening them in a plot with low soil P (with available P < 2.0 kg ha−1) and also a plot with normal soil P (available P > 20 kg ha−1). The rice lines showed significantly high genetic variability for low soil P tolerance associated traits. Stress indices were estimated based on yield under normal and low soil P conditions and cluster analysis based on the stress indices; yield under normal and low soil P condition grouped the genotypes into highly tolerant, tolerant and sensitive to low soil P. Among the rice lines, 18 showed tolerance to low soil P (i.e. yield reduction < 70% in low soil P condition). The genotypic analysis based on Pup1 associated molecular markers revealed the presence of complete or partial Pup1 genomic region in most of the germplasm lines. Interestingly, a landrace called Wazuhophek was observed to be completely devoid of Pup1 and hence it can serve as novel source for low P tolerance.
Text in English
0014-2336 1573-5060 (Online)
https://doi.org/10.1007/s10681-019-2443-0
Phosphorus
Germplasm
Stress
Rice
Molecular characterization
Phenotypic and molecular characterization of rice germplasm lines and identification of novel source for low soil phosphorus tolerance in rice - Netherlands : Springer Nature B.V., 2019.
Peer review
Phosphorus (P) is an essential macro-nutrient required for growth and development of all crop plants including rice. Low availability of P in the soils manifests in terms of impeding crop growth leading to yield losses in rice. Adequate genetic variability for low soil P tolerance and also P use efficiency has been documented in rice and a major QTL called Pup1, conferring tolerance to low soil P has been identified, characterized and cloned from an Indian landrace, Kasalath. In the present study, a set of 98 germplasm lines collected from North-Eastern part of India were characterized for low soil P tolerance by screening them in a plot with low soil P (with available P < 2.0 kg ha−1) and also a plot with normal soil P (available P > 20 kg ha−1). The rice lines showed significantly high genetic variability for low soil P tolerance associated traits. Stress indices were estimated based on yield under normal and low soil P conditions and cluster analysis based on the stress indices; yield under normal and low soil P condition grouped the genotypes into highly tolerant, tolerant and sensitive to low soil P. Among the rice lines, 18 showed tolerance to low soil P (i.e. yield reduction < 70% in low soil P condition). The genotypic analysis based on Pup1 associated molecular markers revealed the presence of complete or partial Pup1 genomic region in most of the germplasm lines. Interestingly, a landrace called Wazuhophek was observed to be completely devoid of Pup1 and hence it can serve as novel source for low P tolerance.
Text in English
0014-2336 1573-5060 (Online)
https://doi.org/10.1007/s10681-019-2443-0
Phosphorus
Germplasm
Stress
Rice
Molecular characterization