Grey Correlation Degree Analysis of High Yield and High Quality Breeding of Soybean in Relay Strip Intercropping(PDF)

¡¶´ó¶¹¿Æѧ¡·[ISSN:1000-9841/CN:23-1227/S]

Issue:

2015Äê04ÆÚ

Page:

565-570

Research Field:

Publishing date:

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Title:

Grey Correlation Degree Analysis of High Yield and High Quality Breeding of Soybean in Relay Strip Intercropping

Author(s):

WU Yu-shan;  GONG Wan-zhuo;  TAN Qian-jun;  WU Xiao-ling;  LIU Wei-guo;  YANG Feng;  YANG Wen-yu

College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China

Keywords:

Soybean;  Relay strip intercropping;  Germplasm;  Grey correlation degree analysis;  High yield breeding;  Quality breeding

PACS:

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DOI:

10.11861/j.issn.1000-9841.2015.04.0565

Abstract:

Relationship between agronomic traits and yield, protein content and fat content is beneficial to screening high yield and quality soybean cultivars in relay strip intercropping.A field experiment was conducted on sixty-eight soybean germplasms by growing under shade (simulated the relay strip intercropping system), grey relational analysis were used to analyze the relationship between agronomic characteristics and yield, protein and fat contents of sixty-eight soybean germplasms.Variability analysis demonstated that the potential to increase yield, protein content and fat content was limited with the variation coefficient was less than 5%, respectively. There were six agronomic traits which the variation coefficient was greater than 10% in the rest of the eight agronomic traits. Especially the variation coefficient of the bottom of the pod, branch number and pod number per plant of high fat varieties was greater than 30%.The potential to increase soybean yield, protein content and fat content through the choice of agronomic traits was larger.Associated order of high yield varieties, high-protein varieties high-fat varieties and agronomic traits was as follows: Growth period£¾ plant height£¾ branches£¾ bottom pod height£¾ pod number£¾ grain weight£¾ nodes on main stem; Growth period£¾ nodes on main stem £¾ plant height £¾ bottom pod height£¾ branches£¾ grain weight £¾ pods per plant; Growth period£¾ bottom pod height £¾ grain weight £¾ plant height £¾ nodes on main stem £¾ branches£¾ pods per plant. Correlation analysis showed that the yield of high yield varieties was significant positive correlated with protein content and significant negative correlation with fat content. There is no significant correlation between yield of high protein content varieties and protein content.And also there is no significant correlation between yield of high fat content varieties and fat content.These results suggest that soybean germplasms with long maturity groups can improve yield, protein content and fat content respectively. High yield and high protein can simultaneously be satisfied for soybean breeding with better adaptation to intercropping.Soybean germplasms with long maturity groups, more branch number and pod number, and moderate plant height can be used to breed high yield and high protein varieties. Selecting varieties with better suitable height of bottom pod and 100-seed weight is expected to increase soybean fat content.This research provides the basis theory for high yield and high quality breeding of soybean in relay strip intercropping.

References:

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