Models for activation of plant genetic resources for crop breeding programs

Author:

Kannenberg L. W.,Falk D. E.

Abstract

Although plant breeders recognize that their working germplasm is constricted, most make little use of the extensive genetic variability in gene banks and other collections. This is because breeders continue to make reasonable progress in most crop species and broadening the activated genetic base generally will dilute agronomic performance. Yet new germplasm can (1) raise the genetic ceiling on improvement, (2) decrease vulnerability to biotic and abiotic stresses, and (3) add new developmental pathways and ecological adaptations. Two breeding systems — HOPE for corn and RIPE for barley — are described which can significantly broaden the genetic base deployed in breeding programs while still producing lines and cultivars with commercial potential. The Hierarchical Open-ended Population Enrichment (HOPE) breeding system consists of two complementary sets, each of four gene pools arranged in a hierarchy based on agronomic performance. Introductions are added continually and desirable genes and gene complexes can routinely move upward in the hierarchy. Increasingly stringent selection procedures at each higher level of the hierarchy shape the extensive variability at the lower levels into the quality germplasm at the Elite level, which serves as the source of inbred lines. The Recurrent Introgressive Population Enrichment (RIPE) breeding system for barley employs male sterile facilitated recurrent selection to progressively introgress new genes and gene complexes into an Elite population which serves as the source of potential new cultivars. Key words: Broad-based breeding system, HOPE (maize), hierarchical open-ended system, RIPE (barley), recurrent introgressive selection, male sterile facilitated selection

Publisher

Canadian Science Publishing

Subject

Horticulture,Plant Science,Agronomy and Crop Science

Cited by 40 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3