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| 1 | Physiological traits contributed to the recent increase in yield potential of winter wheat from Henan Province, China显示文摘This experiment aims to test the traits responsible for the increase in yield potential of winter wheat released in Henan Province, China. Seven established cultivars released in the last 20 years and three advanced lines were assayed. The results showed that grain yield was positively correlated with harvest index(HI), kernel number per square meter, and aboveground biomass. In addition, the HI and aboveground biomass showed an increasing trend with the year of release.Therefore, we can conclude that bread wheat breeding advances during recent decades in Henan Province, China,have been achieved through an increase in HI, kernel number per square meter, and aboveground biomass. A higher d13C seems also to be involved in these advances, which suggests a progressive improvement in constitutive water use efficiency not associated with a trend towards lower stomatal conductance in the most recent genotypes. However, genetic advance Researchdoes not appear related to changes in photosynthesis rates on area basis when measured in the flag leaf or the spike,but only to a higher, whole‐spike photosynthesis. Results also indirectly support the concept that under potential yield conditions, the spike contributed more than the flag leaf to kernel formation. | Bangwei Zhou álvaro Sanz-Sáez Abdelhalim Elazab Tianmin Shen Rut Sánchez-Bragado Jordi Bort Maria Dolors Serret José Luis Araus | 2014 | Journal of Integrative Plant Biology2014，56，5： | 6 |
| 2 | Genetic Analysis of Carbon Isotope Discrimination and its Relation to Yield in a Wheat Doubled Haploid Population显示文摘Carbon isotope discrimination(△13C) is considered a useful indicator for indirect selection of grain yield(GY) in cereals.Therefore,it is important to evaluate the genetic variation in △13C and its relationship with GY.A doubled haploid(DH) population derived from a cross of two common wheat varieties,Hanxuan 10(H10) and Lumai 14(L14),was phenotyped for △13C in the flag leaf,GY and yield associated traits in two trials contrasted by water availability,specifically,rain-fed and irrigated.Quantitative trait loci(QTLs) were identified by single locus and two locus QTL analyses.QTLs for △13C were located on chromosomes 1A,2B,3B,5A,7A and 7B,and QTLs for other traits on all chromosomes except 1A,4D,5A,5B and 6D.The population selected for high △13C had an increased frequency of QTL for high △13C,GY and number of spikes per plant(NSP) when grown under rain-fed conditions and only for high △13C and NSP when grown under irrigated conditions,which was consistent with agronomic performance of the corresponding trait values in the high △13C progeny;that is,significantly greater than that in the low △13C.Therefore,selection for △13C was beneficial in increasing grain yield in rain-fed environments. | Xianshan Wu Xiaoping Chang Ruilian Jing | 2011 | Journal of Integrative Plant Biology2011，53，9： | 6 |
| 3 | Traits associated with winter wheat grain yield in Central and West Asia显示文摘Improved adaptation of winter wheat(Triticum aestivum L.) to drought and heat may be influenced by days to heading, plant height, biomass, canopy temperature(CT) at grain filling, and rate of senescence. This study shows that,under supplemental irrigation or rainfed conditions, days to heading and plant height together explain up to 68% of grain yield(GY) variation, and these associations were further confirmed in several locations across West and Central Asia.Days to heading can be slightly reduced below that of check line Karahan to further improve GY while avoiding the effect of late frosts. Plant height has been decreased in recent germplasm, but further reductions below that of check line Karahan could still improve GY in a wide range of environments. However, in Iranian sites, taller genotypes showed better adaptation with higher biomass and increased reservesfor grain filling. Canopy temperature and rate senescence were not associated with GY. A normalized difference vegetation index, used to estimate biomass(Feekes stages 4–5), had intermediate heritability across environments and correlated positively with GY under low plant density and should be explored further as a tool for early selection. | Marta Silva Lopes Didem Saglam Mutlu Ozdogan Matthew Reynolds | 2014 | Journal of Integrative Plant Biology2014，56，7： | 0 |
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