A STUDY ON RE- SELECTION OF ADVANCED GENERATIONSOYBEANS STRAINS(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:

2000年02期

Page:

140-145

Research Field:

Publishing date:

Info

Title:

A STUDY ON RE- SELECTION OF ADVANCED GENERATIONSOYBEANS STRAINS

Author(s):

Zhu Cheng so ng　Chen Xin　Gu Heping

Inst itute of industrial Crops, J iangsu Academy of Agricul tural Sciences, N anjina 210014

Keywords:

Soy bean;  Re- selection;  Genetic v aria tio n;  Multiple no rmal di st ribution

PACS:

-

DOI:

10.11861/j.issn.1000-9841.2000.02.0140

Abstract:

Re- selection w as made in tw o adva nced genera tion soybea n st rains. Geneticva ria tion and g enetic gains o f sev eral principal characters o f tw o st rains w ere estima ted,then the possibili ty of re- selectio n wa s di scussed. The multiv ariate v ariabi li ty w as alsoestima ted fo r 8 ag ro nomic t rai ts and 3 yield- component t rai ts, the mul tiv ariate relativ eg enetic g ains o f 3 t rait s for simul taneo us seleci ton w ere a naly zed. Po pulatio n si ze neededin multiple character selection fo r di fferent demands w as ev aluated by using approx ima tecalcualtio n of multiple normal di st ribution. A new idea served fo r study o n genetic g ainso f mul tiple character and estimation of basic population si ze w as represented in thepaper. The results show ed that 2. 5% - 5% relativ e g enetic gains o f number o f pods perplant and 100- g rain w eigh t of the Nannong 88- 48 st rain ca n be g ot wi th number ofg rains per pod keeping at the o rigina l lev el f rom pure line selectio n o f 600- 1000 plantsand about 2. 5 - 5% , 2. 5% - 5% , 7. 5% - 15% relativ e g enetic gains of days tomaturity, incidence of infected seed, incidence o f insect- bi t seed of Sudo u 89- 2 straincan be o btained w hen it s yield remains a t the o riginal lev el throug h pure line selectionf rom 1200- 2500 plants.

References:

1　盖钧镒、崔章林,中国大豆育成品种的亲本分析,南京农业大学学报, 1994, 17( 3): 19- 23

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