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Citation:

Estimation of Parents Genetic Gain by Open-pollinated Progeny Test of Seedling Seed Orchard of Masson Pine

  • Received Date: 2011-10-06
  • Using the progeny test plantation of Pinus massoniana seedling seed orchard located in Baisha Forestry Farm, Fujian province as materials, the genetic variations, heritabilities and increments (height, diameter at breast height, and stem volume) and form (stem straightness, crown width, and branch diameter) traits of P. massoniana at age 5 and 6 were estimated and analyzed. The genetic variations differed among traits. Obvious genetic variations possessed among and within families and intra-family variation (85%) was a main source. Family and individual heritabilities ranged from 0.493 to 0.731, and 0.080 to 0.199, respectively. Best linear prediction with stem volume and multi-traits (stem volume, crown width, branch diameter and stem straightness) was used to estimate the aggregated breeding values of families at age 6. Furthermore, realized and predicted genetic gains of female parents with different selection methods and selection rates were presented, in which the even-weighted multi-traits joint selection was the best way for female parent family selection and could get relatively higher genetic gains.
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Estimation of Parents Genetic Gain by Open-pollinated Progeny Test of Seedling Seed Orchard of Masson Pine

  • 1. Key Laboratory of Forest Genetics and Gene Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, China
  • 2. Baisha Forestry Farm, Shanghang 364200, Fujian, China

Abstract: Using the progeny test plantation of Pinus massoniana seedling seed orchard located in Baisha Forestry Farm, Fujian province as materials, the genetic variations, heritabilities and increments (height, diameter at breast height, and stem volume) and form (stem straightness, crown width, and branch diameter) traits of P. massoniana at age 5 and 6 were estimated and analyzed. The genetic variations differed among traits. Obvious genetic variations possessed among and within families and intra-family variation (85%) was a main source. Family and individual heritabilities ranged from 0.493 to 0.731, and 0.080 to 0.199, respectively. Best linear prediction with stem volume and multi-traits (stem volume, crown width, branch diameter and stem straightness) was used to estimate the aggregated breeding values of families at age 6. Furthermore, realized and predicted genetic gains of female parents with different selection methods and selection rates were presented, in which the even-weighted multi-traits joint selection was the best way for female parent family selection and could get relatively higher genetic gains.

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