Articles by Author: Marvellous Zhou

Search results for Marvellous Zhou

We found 19 results for you
  1. Minimum detectable differences for cane yield, sucrose content and sugar yield among the Midlands and Coastal Short Cycle sugarcane breeding programmes in South Africa

    Minimum detectable differences for cane yield, sucrose content and sugar yield among the Midlands and Coastal Short Cycle sugarcane breeding programmes in South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Minimum detectable differences (MDD) are the smallest difference between two genotypes that can be determined accurately at a given statistical significance threshold. The effect of genotype by environment interaction reduces accuracy of determining genetic values, increases MDD and reduces selection...
  2. Family versus individual plant selection for stem borer (<em>Eldana saccharina</em>) resistance in early stages of sugarcane breeding in South Africa

    Family versus individual plant selection for stem borer (<em>Eldana saccharina</em>) resistance in early stages of sugarcane breeding in South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Eldana saccharina is an indigenous lepidopteran insect pest and the most damaging stem borer of sugarcane in southern Africa. Breeding for E. saccharina resistance in South Africa started in 1980 by crossing resistant parents (expected to possess resistance genes) and...
  3. Cultivar genetic gains from 50 years of irrigated sugarcane breeding in South Africa

    Cultivar genetic gains from 50 years of irrigated sugarcane breeding in South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Cultivar genetic gains provide a measure of benefits to growers from sugarcane breeding programmes and determine the effectiveness of cultivar development. The objective of this study was to determine the genetic gains for cane yield, percent estimated recoverable crystal (ERC%)...
  4. Trends and magnitudes of genotype × environment interaction variance components for yield, quality and agronomic traits among coastal short cycle sugarcane breeding populations

    Trends and magnitudes of genotype × environment interaction variance components for yield, quality and agronomic traits among coastal short cycle sugarcane breeding populations

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Genotype × environment interactions (G×E) can reduce the genetic contribution to the phenotype and increase minimum detectable differences, which eventually reduce selection precision. This study was conducted to determine the magnitudes and trends of G×E variance components for sugarcane yield,...
  5. Seasonal and varietal effects on tiller population development of sugarcane (<em>Saccharum Officinarum</em> L.)

    Seasonal and varietal effects on tiller population development of sugarcane (<em>Saccharum Officinarum</em> L.)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Tillers carry leaves, determine leaf area index and indirectly influence the amount of photosynthetically active radiation (PAR) intercepted by the sugarcane canopy. Tillers develop into stalks, the sink for the products of photosynthesis. The objective of this study was to...
  6. Optimum replications and crop-years for sugarcane genotype trials at Dwangwa Sugar Estate in Malawi

    Optimum replications and crop-years for sugarcane genotype trials at Dwangwa Sugar Estate in Malawi

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The ability to detect significant differences among genotypes in trials depends on the variance associated with the means. Dwangwa Sugar Estate, Malawi, imports genotypes from the South African Sugarcane Research Institute (SASRI) to test for possible commercial release. The objective...
  7. Simultaneous selection for yield and ratooning ability in sugarcane genotypes using analysis of covariance

    Simultaneous selection for yield and ratooning ability in sugarcane genotypes using analysis of covariance

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Ratooning ability increases sugarcane production economics by reducing frequency of planting. During sugarcane breeding, indirect selection for pest resistance and direct selection for high ratoon yields increases ratooning ability. The objective of this study was to describe the simultaneous screening...
  8. Family selection gains for quality traits among South African sugarcane breeding populations

    Family selection gains for quality traits among South African sugarcane breeding populations

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    In sugarcane breeding, family selection has been shown to produce larger gains than individual plant selection. During family selection, whole families of seedlings are selected or rejected based on data derived from replicated family plots. The objective of this study...
  9. On the irrationality of a certain multivariate infinite product

    On the irrationality of a certain multivariate infinite product

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    By using simultaneous rational approximation, we prove that If q, m, M are integers with q > 1, m ≥ 2, M ≥ m 2 − 2, and r 1, r 2, …, r m are any positive rationals,...
  10. NOTES ON NILPOTENCY OF NIL SUBRINGS OF ENDOMORPHISM RINGS OF MODULES

    NOTES ON NILPOTENCY OF NIL SUBRINGS OF ENDOMORPHISM RINGS OF MODULES

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    A family K of right R-modules is called a natural class if K is closed under submodules, direct sums, infective hulls, and isomorphic copies. The main result of this note is the following: Let K be a natural class on...