Arid
DOI10.1023/A:1003965025727
Heterosis in landrace-based topcross hybrids of pearl millet across arid environments
Yadav, OP; Weltzien-Rattunde, E; Bidinger, FR; Mahalakshmi, V
通讯作者Yadav, OP
来源期刊EUPHYTICA
ISSN0014-2336
出版年2000
卷号112期号:3页码:285-295
英文摘要

This study quantified the magnitude of heterosis in pearl millet (Pennisetum glaucum) topcross hybrids produced by crossing 16 diverse landraces and three high yielding open-pollinating varieties on two homozygous male-sterile lines. Hybrids and pollinators were grown in 12 year x location combinations in India that were grouped into three zones. Genetic components of variance quantifying the differences among these hybrids were estimated. The hybrids showed a conspicuous heterosis for grain yield, earliness and biomass yield but not for straw yield. The level and direction of heterosis for time to flowering depended strongly on the earliness of the male-sterile line. In the terminal drought stress zone hybrids made on the early maturing male-sterile line 843A had the highest level of heterosis for grain yield (88%). This was partly due to escape from terminal stress. In the other two zones the heterosis for grain yield was on average 30%. Heterosis for biomass yield and biomass yield per day was on average also positive in all three zones. For all traits, except time to flowering and biomass yield per day, pollinator effects were the only significant source of variation. Differences between hybrids were mostly caused by additive genetic effects. Significant amount of heterosis observed in landrace-based topcross hybrids for grain yield and other productivity-related traits suggested that substantial improvement in pearl millet productivity in and environments can be obtained by topcrossing locally adapted landraces on suitable male-sterile lines.


英文关键词genetic variance heterosis landrace Pennisetum glaucum stress environments topcross hybrids
类型Article
语种英语
国家India
收录类别SCI-E
WOS记录号WOS:000085981900009
WOS关键词PERFORMANCE ; STABILITY ; TRAITS ; STRESS ; YIELD
WOS类目Agronomy ; Plant Sciences ; Horticulture
WOS研究方向Agriculture ; Plant Sciences
来源机构ICAR Central Arid Zone Research Institute ; International Crops Research Institute for the Semi-Arid Tropics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/138930
作者单位(1)Cent Arid Zone Res Inst, Jodhpur 342003, Rajasthan, India;(2)Int Crops Res Inst Semi Arid Trop, Patancheru 502324, Andhra Pradesh, India
推荐引用方式
GB/T 7714
Yadav, OP,Weltzien-Rattunde, E,Bidinger, FR,et al. Heterosis in landrace-based topcross hybrids of pearl millet across arid environments[J]. ICAR Central Arid Zone Research Institute, International Crops Research Institute for the Semi-Arid Tropics,2000,112(3):285-295.
APA Yadav, OP,Weltzien-Rattunde, E,Bidinger, FR,&Mahalakshmi, V.(2000).Heterosis in landrace-based topcross hybrids of pearl millet across arid environments.EUPHYTICA,112(3),285-295.
MLA Yadav, OP,et al."Heterosis in landrace-based topcross hybrids of pearl millet across arid environments".EUPHYTICA 112.3(2000):285-295.
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