Development of Heterotic Groups in Triticale

被引：62

作者：

Fischer, S. ^{[1
]}

Maurer, H. P. ^{[2
]}

Wuerschum, T. ^{[2
]}

Moehring, J. ^{[3
]}

Piepho, H. -P. ^{[3
]}

Schoen, C. C. ^{[4
]}

Thiemt, E. -M. ^{[5
]}

Dhillon, B. S. ^{[1
]}

Weissmann, E. A. ^{[6
]}

Melchinger, A. E. ^{[1
]}

Reif, J. C. ^{[2
]}

机构：

[1] Univ Hohenheim, Inst Plant Breeding Seed Sci & Populat Genet, D-70593 Stuttgart, Germany

[2] Univ Hohenheim, State Plant Breeding Inst, D-70593 Stuttgart, Germany

[3] Univ Hohenheim, Bioinformat Unit, Inst Crop Prod & Grassland Res, D-70593 Stuttgart, Germany

[4] Tech Univ Munchen Weihenstephan, Ctr Life & Food Sci, D-85350 Freising Weihenstephan, Germany

[5] Testing Stn Scharnhorst, D-31535 Neustadt, Germany

[6] Saatzucht Dr Hege GbRmbH, D-74638 Domane Hohebuch, Waldenburg, Germany

来源：

CROP SCIENCE | 2010年 / 50卷 / 02期

关键词：

COMBINING ABILITY; AGRONOMIC TRAITS; WINTER TRITICALE; HYBRID PERFORMANCE; YIELD; DIVERGENCE; VARIANCE; IMPACT; MAIZE; WHEAT;

D O I：

10.2135/cropsci2009.04.0225

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Heterotic groups are an essential prerequisite for efficient hybrid breeding. The present study in winter triticale (xTriticosecale Wittmack) was performed to (i) evaluate the magnitude of heterosis, (ii) investigate the efficiency of the prediction of hybrid performance based on midparent value or general combining ability (GCA) effects, and (iii) identify two heterotic groups by employing principle coordinate analysis and an enumeration algorithm for maximizing F-1 performance, midparent heterosis, and sigma(2)(GCA)/sigma(2)(SCA) ratio for grain yield. Twenty-one inbred lines and their 210 diallel crosses were field-evaluated for grain yield at five agroecologically diverse locations in Germany. On average, the hybrids yielded 8.6% higher than the midparent performance, and the maximum superiority was 12.4%. Hybrid performance was predicted more reliably with GCA effects rather than with midparent performance. An enumeration algorithm based on optimum allocation of parents to heterotic groups, improved all three criteria. F, performance, midparent heterosis, and sigma(2)(GCA)/sigma(2)(SCA) ratio increased by about 3, 24, and 70%, respectively, as compared with the base situation of having no heterotic groups. These improvements substantiate the potential advantages, when heterotic groups are developed in hybrid breeding.

引用

页码：584 / 590

页数：7

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