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  • CSIRO Publishing  (3)
  • Yan, Xiaolong  (3)
  • Biodiversity Research  (3)
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  • CSIRO Publishing  (3)
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  • Biodiversity Research  (3)
  • 1
    Online Resource
    Online Resource
    Corrigendum to: Genetic mapping of basal root gravitropism and phosphorus acquisition efficiency in common bean
    CSIRO Publishing ; 2006
    In:  Functional Plant Biology Vol. 33, No. 2 ( 2006), p. 207-
    Details
    In: Functional Plant Biology, CSIRO Publishing, Vol. 33, No. 2 ( 2006), p. 207-
    Abstract: Root gravitropism determines the relative distribution of plant roots in different soil layers, and therefore, may influence the acquisition of shallow soil resources such as phosphorus (P). Growth pouch and field studies were conducted to evaluate root gravitropism of common bean (Phaseolus vulgaris L.) in response to P deficiency and to detect quantitative trait loci (QTL) associated with this trait. A deep-rooted genotype, DOR364, was crossed with a shallow-rooted genotype, G19833, to obtain 86 F5.7 recombinant inbred lines (RILs). Root gravitropic traits were measured as basal root growth angle (BRGA), shallow basal root length (SBRL, basal root length in the top 0-3 cm of soil) and relative shallow basal root length (RSBRL, percentage of basal root length in the top 0-3 cm of soil relative to total basal root length). Large genetic variability for these traits was found in the parents and RILs, with BRGA ranging from -18.73 to 56.69� and SBRL ranging from 0.42 to 2.63 m per plant. The parents and six RILs with contrasting root gravitropism were further evaluated in the field, where root shallowness was significantly correlated with plant growth and P uptake. QTL were detected by single point analysis (SPA), interval mapping (IM) and composite interval mapping (CIM) techniques with a genetic map for the DOR364 � G19833 population consisting of 236 molecular markers. The IM�/�CIM QTL were detected among the 11 linkage groups of common bean, with 16 QTL controlling the above root traits and six QTL controlling P acquisition efficiency (PAE) in the field study. At least three of the root trait QTL were associated with QTL for PAE, suggesting that root gravitropic traits are associated with PAE and that QTL for these traits can be used to facilitate selection and breeding for higher P efficiency in common bean and other crops.
    Type of Medium: Online Resource
    ISSN: 1445-4408
    URL: Article
    DOI: 10.1071/FP03255_CO
    Language: English
    Publisher: CSIRO Publishing
    Publication Date: 2006
    SSG: 12
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  • 2
    Online Resource
    Online Resource
    Genetic variability for root morph-architecture traits and root growth dynamics as related to phosphorus efficiency in soybean
    CSIRO Publishing ; 2010
    In:  Functional Plant Biology Vol. 37, No. 4 ( 2010), p. 304-
    Details
    In: Functional Plant Biology, CSIRO Publishing, Vol. 37, No. 4 ( 2010), p. 304-
    Abstract: Root morphology and architecture are believed to be important for plant phosphorus (P) efficiency, but their genetic information is relatively scarce. In the present study, a field and a specially designed minirhizotron experiments were conducted using two soybean (Glycine max L. Merr.) genotypes and their 88 recombinant inbred lines (RILs) to elucidate the genetic variability for root morph-architecture traits and root growth dynamics as related to P efficiency in soybean. The results indicated that the root morph-architecture traits were continually segregated in the RILs with a normal distribution, indicating which are possibly controlled by quantitative trait loci. Significantly positive correlations were found between root and P traits, suggesting feasibility of screening P efficient genotype through simple selection of root traits in field. Most root morph-architecture traits were closely correlated, showing a coordinating contribution to P efficiency. Furthermore, root morphological traits always had higher heritability than architecture traits, thus, could serve as more reliable index in field selection. The dynamic parameters of root growth from the minirhizotron experiment showed that the P efficient genotype established longer and larger root system with preferring distribution in surface layer and also kept more active roots, therefore, had a better growth performance in field, than the P-inefficient genotype. Taken together, this is the first report on in situ root growth dynamics and its relation to P efficiency using minirhizotron systems in crops. Our findings help to better understand the relationships between P efficiency and root traits and, thus, facilitate development of P efficient genotypes in crops.
    Type of Medium: Online Resource
    ISSN: 1445-4408
    URL: Article
    DOI: 10.1071/FP09215
    Language: English
    Publisher: CSIRO Publishing
    Publication Date: 2010
    SSG: 12
    Location Call Number Limitation Availability
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    Online Resource
  • 3
    Online Resource
    Online Resource
    Genetic mapping of basal root gravitropism and phosphorus acquisition efficiency in common bean
    CSIRO Publishing ; 2004
    In:  Functional Plant Biology Vol. 31, No. 10 ( 2004), p. 959-
    Details
    In: Functional Plant Biology, CSIRO Publishing, Vol. 31, No. 10 ( 2004), p. 959-
    Abstract: Root gravitropism determines the relative distribution of plant roots in different soil layers, and therefore, may influence the acquisition of shallow soil resources such as phosphorus (P). Growth pouch and field studies were conducted to evaluate root gravitropism of common bean (Phaseolus vulgaris L.) in response to P deficiency and to detect quantitative trait loci (QTL) associated with this trait. A deep-rooted genotype, DOR364, was crossed with a shallow-rooted genotype, G19833, to obtain 86 F5.7 recombinant inbred lines (RILs). Root gravitropic traits were measured as basal root growth angle (BRGA), shallow basal root length (SBRL, basal root length in the top 0–3 cm of soil) and relative shallow basal root length (RSBRL, percentage of basal root length in the top 0–3 cm of soil relative to total basal root length). Large genetic variability for these traits was found in the parents and RILs, with BRGA ranging from –18.73 to 56.69º and SBRL ranging from 0.42 to 2.63 m per plant. The parents and six RILs with contrasting root gravitropism were further evaluated in the field, where root shallowness was significantly correlated with plant growth and P uptake. QTL were detected by single point analysis (SPA), interval mapping (IM) and composite interval mapping (CIM) techniques with a genetic map for the DOR364 × G19833 population consisting of 236 molecular markers. The IM / CIM QTL were detected among the 11 linkage groups of common bean, with 16 QTL controlling the above root traits and six QTL controlling P acquisition efficiency (PAE) in the field study. At least three of the root trait QTL were associated with QTL for PAE, suggesting that root gravitropic traits are associated with PAE and that QTL for these traits can be used to facilitate selection and breeding for higher P efficiency in common bean and other crops.
    Type of Medium: Online Resource
    ISSN: 1445-4408
    URL: Article
    DOI: 10.1071/FP03255
    Language: English
    Publisher: CSIRO Publishing
    Publication Date: 2004
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
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